* [PATCH 2/2] kernel: Move arches to use common unaligned access
@ 2008-04-11 3:38 Harvey Harrison
2008-04-11 7:48 ` Ingo Molnar
2008-04-11 10:11 ` David Howells
0 siblings, 2 replies; 9+ messages in thread
From: Harvey Harrison @ 2008-04-11 3:38 UTC (permalink / raw)
To: Andrew Morton; +Cc: LKML, David Howells, linux-arch, Linus Torvalds
Unaligned access is ok for the following arches:
cris, m68k, mn10300, powerpc, s390, x86
Arches that use the no-builtin-memcpy implementation:
h8300, m32r, xtensa
generic_le:
alpha, blackfin, ia64,
generic_be:
parisc, sparc, sparc64
generic_le or be, choice based on compiler flags:
mips, sh
m86knommu is generic_be for Coldfire, otherwise unaligned access is ok.
frv uses the no_builtin_memcpy implementation when there is an MMU
configured, otherwise uses the generic be byteshifting version.
arm chooses endianness based on compiler settings, uses the byteshifting
versions.
v850 is le, uses the byteshifting versions for both be and le.
Remove the now unused asm-generic implementation.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
David, this version uses the generic C versions, but if your testing finds the
handrolled frv versions were better as we've been discussing, I will restore them.
include/asm-alpha/unaligned.h | 2 +-
include/asm-arm/unaligned.h | 166 +---------------------------------
include/asm-avr32/unaligned.h | 2 +-
include/asm-blackfin/unaligned.h | 2 +-
include/asm-cris/unaligned.h | 8 +--
include/asm-frv/unaligned.h | 184 ++-----------------------------------
include/asm-generic/unaligned.h | 124 -------------------------
include/asm-h8300/unaligned.h | 11 +--
include/asm-ia64/unaligned.h | 2 +-
include/asm-m32r/unaligned.h | 15 +---
include/asm-m68k/unaligned.h | 9 +--
include/asm-m68knommu/unaligned.h | 10 +--
include/asm-mips/unaligned.h | 29 ++----
include/asm-mn10300/unaligned.h | 126 +-------------------------
include/asm-parisc/unaligned.h | 2 +-
include/asm-powerpc/unaligned.h | 9 +--
include/asm-s390/unaligned.h | 9 +--
include/asm-sh/unaligned.h | 6 +-
include/asm-sparc/unaligned.h | 2 +-
include/asm-sparc64/unaligned.h | 2 +-
include/asm-v850/unaligned.h | 111 +----------------------
include/asm-x86/unaligned.h | 30 +------
include/asm-xtensa/unaligned.h | 12 +--
23 files changed, 48 insertions(+), 825 deletions(-)
diff --git a/include/asm-alpha/unaligned.h b/include/asm-alpha/unaligned.h
index a1d7284..18acc19 100644
--- a/include/asm-alpha/unaligned.h
+++ b/include/asm-alpha/unaligned.h
@@ -1,6 +1,6 @@
#ifndef __ALPHA_UNALIGNED_H
#define __ALPHA_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
#endif
diff --git a/include/asm-arm/unaligned.h b/include/asm-arm/unaligned.h
index 5db03cf..d5cf478 100644
--- a/include/asm-arm/unaligned.h
+++ b/include/asm-arm/unaligned.h
@@ -1,171 +1,7 @@
#ifndef __ASM_ARM_UNALIGNED_H
#define __ASM_ARM_UNALIGNED_H
-#include <asm/types.h>
-
-extern int __bug_unaligned_x(const void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8)
-
-#define __get_unaligned_2_be(__p) \
- (unsigned int)(__p[0] << 8 | __p[1])
-
-#define __get_unaligned_4_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define __get_unaligned_4_be(__p) \
- (unsigned int)(__p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3])
-
-#define __get_unaligned_8_le(__p) \
- ((unsigned long long)__get_unaligned_4_le((__p+4)) << 32 | \
- __get_unaligned_4_le(__p))
-
-#define __get_unaligned_8_be(__p) \
- ((unsigned long long)__get_unaligned_4_be(__p) << 32 | \
- __get_unaligned_4_be((__p+4)))
-
-#define __get_unaligned_le(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_le(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-#define __get_unaligned_be(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_be(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-
-static inline void __put_unaligned_2_le(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_2_be(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v >> 8;
- *__p++ = __v;
-}
-
-static inline void __put_unaligned_4_le(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_le(__v >> 16, __p + 2);
- __put_unaligned_2_le(__v, __p);
-}
-
-static inline void __put_unaligned_4_be(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_be(__v >> 16, __p);
- __put_unaligned_2_be(__v, __p + 2);
-}
-
-static inline void __put_unaligned_8_le(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_le(__v >> 32, __p+4);
- __put_unaligned_4_le(__v, __p);
-}
-
-static inline void __put_unaligned_8_be(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_be(__v >> 32, __p);
- __put_unaligned_4_be(__v, __p+4);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define __put_unaligned_le(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_le((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_le((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_le((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-#define __put_unaligned_be(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_be((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_be((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_be((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
+#include <linux/unaligned/generic.h>
/*
* Select endianness
diff --git a/include/asm-avr32/unaligned.h b/include/asm-avr32/unaligned.h
index 36f5fd4..28fa20e 100644
--- a/include/asm-avr32/unaligned.h
+++ b/include/asm-avr32/unaligned.h
@@ -11,6 +11,6 @@
* optimize word loads in general.
*/
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#endif /* __ASM_AVR32_UNALIGNED_H */
diff --git a/include/asm-blackfin/unaligned.h b/include/asm-blackfin/unaligned.h
index 10081dc..25861cd 100644
--- a/include/asm-blackfin/unaligned.h
+++ b/include/asm-blackfin/unaligned.h
@@ -1,6 +1,6 @@
#ifndef __BFIN_UNALIGNED_H
#define __BFIN_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
#endif /* __BFIN_UNALIGNED_H */
diff --git a/include/asm-cris/unaligned.h b/include/asm-cris/unaligned.h
index 7fbbb39..8bd3555 100644
--- a/include/asm-cris/unaligned.h
+++ b/include/asm-cris/unaligned.h
@@ -3,14 +3,8 @@
/*
* CRIS can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif
diff --git a/include/asm-frv/unaligned.h b/include/asm-frv/unaligned.h
index dc8e9c9..ff01156 100644
--- a/include/asm-frv/unaligned.h
+++ b/include/asm-frv/unaligned.h
@@ -9,9 +9,8 @@
* 2 of the License, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
-
+#ifndef _ASM_FRV_UNALIGNED_H_
+#define _ASM_FRV_UNALIGNED_H_
/*
* Unaligned accesses on uClinux can't be performed in a fault handler - the
@@ -19,184 +18,19 @@
*
* With the FR451, however, they are precise, and so we used to fix them up in
* the memory access fault handler. However, instruction bundling make this
- * impractical. So, now we fall back to using memcpy.
+ * impractical. So, now we fall back to using memmov.
*/
#ifdef CONFIG_MMU
-/*
- * The asm statement in the macros below is a way to get GCC to copy a
- * value from one variable to another without having any clue it's
- * actually doing so, so that it won't have any idea that the values
- * in the two variables are related.
- */
-
-#define get_unaligned(ptr) ({ \
- typeof((*(ptr))) __x; \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(&__x, __ptrcopy, sizeof(*(ptr))); \
- __x; \
-})
-
-#define put_unaligned(val, ptr) ({ \
- typeof((*(ptr))) __x = (val); \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(__ptrcopy, &__x, sizeof(*(ptr))); \
-})
-
+#include <linux/unaligned/no_builtin_memcpy.h>
extern int handle_misalignment(unsigned long esr0, unsigned long ear0, unsigned long epcr0);
#else
-#define get_unaligned(ptr) \
-({ \
- typeof(*(ptr)) x; \
- const char *__p = (const char *) (ptr); \
- \
- switch (sizeof(x)) { \
- case 1: \
- x = *(ptr); \
- break; \
- case 2: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I4.p %M4,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I5.p %M5,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- union { uint64_t x; u32 y[2]; } z; \
- uint8_t a; \
- asm(" ldub%I3 %M3,%0 \n" \
- " ldub%I4.p %M4,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I5.p %M5,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I6.p %M6,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I7 %M7,%1 \n" \
- " ldub%I8.p %M8,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I9.p %M9,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I10.p %M10,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- : "=&r"(z.y[0]), "=&r"(z.y[1]), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]), \
- "m"(__p[4]), "m"(__p[5]), "m"(__p[6]), "m"(__p[7]) \
- ); \
- x = z.x; \
- break; \
- } \
- \
- default: \
- x = 0; \
- BUG(); \
- break; \
- } \
- \
- x; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- char *__p = (char *) (ptr); \
- int x; \
- \
- switch (sizeof(*ptr)) { \
- case 2: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2 %0,%M2 \n" \
- : "=r"(x), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4 %0,%M4 \n" \
- : "=r"(x), "=m"(__p[3]), "=m"(__p[2]), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- uint32_t __high, __low; \
- __high = (uint64_t)val >> 32; \
- __low = val & 0xffffffff; \
- asm(" stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4.p %0,%M4 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I5.p %0,%M5 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I6.p %1,%M6 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I7.p %1,%M7 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I8.p %1,%M8 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I9 %1,%M9 \n" \
- : "=&r"(__low), "=&r"(__high), "=m"(__p[7]), "=m"(__p[6]), \
- "=m"(__p[5]), "=m"(__p[4]), "=m"(__p[3]), "=m"(__p[2]), \
- "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(__low), "1"(__high) \
- ); \
- break; \
- } \
- \
- default: \
- *(ptr) = (val); \
- break; \
- } \
-} while(0)
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#endif
+#endif /* CONFIG_MMU */
-#endif
+#endif /* _ASM_FRV_UNALIGNED_H_ */
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
deleted file mode 100644
index 2fe1b2e..0000000
--- a/include/asm-generic/unaligned.h
+++ /dev/null
@@ -1,124 +0,0 @@
-#ifndef _ASM_GENERIC_UNALIGNED_H_
-#define _ASM_GENERIC_UNALIGNED_H_
-
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- *
- * This is based almost entirely upon Richard Henderson's
- * asm-alpha/unaligned.h implementation. Some comments were
- * taken from David Mosberger's asm-ia64/unaligned.h header.
- */
-
-#include <linux/types.h>
-
-/*
- * The main single-value unaligned transfer routines.
- */
-#define get_unaligned(ptr) \
- __get_unaligned((ptr), sizeof(*(ptr)))
-#define put_unaligned(x,ptr) \
- ((void)sizeof(*(ptr)=(x)),\
- __put_unaligned((__force __u64)(x), (ptr), sizeof(*(ptr))))
-
-/*
- * This function doesn't actually exist. The idea is that when
- * someone uses the macros below with an unsupported size (datatype),
- * the linker will alert us to the problem via an unresolved reference
- * error.
- */
-extern void bad_unaligned_access_length(void) __attribute__((noreturn));
-
-struct __una_u64 { __u64 x __attribute__((packed)); };
-struct __una_u32 { __u32 x __attribute__((packed)); };
-struct __una_u16 { __u16 x __attribute__((packed)); };
-
-/*
- * Elemental unaligned loads
- */
-
-static inline __u64 __uldq(const __u64 *addr)
-{
- const struct __una_u64 *ptr = (const struct __una_u64 *) addr;
- return ptr->x;
-}
-
-static inline __u32 __uldl(const __u32 *addr)
-{
- const struct __una_u32 *ptr = (const struct __una_u32 *) addr;
- return ptr->x;
-}
-
-static inline __u16 __uldw(const __u16 *addr)
-{
- const struct __una_u16 *ptr = (const struct __una_u16 *) addr;
- return ptr->x;
-}
-
-/*
- * Elemental unaligned stores
- */
-
-static inline void __ustq(__u64 val, __u64 *addr)
-{
- struct __una_u64 *ptr = (struct __una_u64 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustl(__u32 val, __u32 *addr)
-{
- struct __una_u32 *ptr = (struct __una_u32 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustw(__u16 val, __u16 *addr)
-{
- struct __una_u16 *ptr = (struct __una_u16 *) addr;
- ptr->x = val;
-}
-
-#define __get_unaligned(ptr, size) ({ \
- const void *__gu_p = ptr; \
- __u64 __val; \
- switch (size) { \
- case 1: \
- __val = *(const __u8 *)__gu_p; \
- break; \
- case 2: \
- __val = __uldw(__gu_p); \
- break; \
- case 4: \
- __val = __uldl(__gu_p); \
- break; \
- case 8: \
- __val = __uldq(__gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (__force __typeof__(*(ptr)))__val; \
-})
-
-#define __put_unaligned(val, ptr, size) \
-({ \
- void *__gu_p = ptr; \
- switch (size) { \
- case 1: \
- *(__u8 *)__gu_p = (__force __u8)val; \
- break; \
- case 2: \
- __ustw((__force __u16)val, __gu_p); \
- break; \
- case 4: \
- __ustl((__force __u32)val, __gu_p); \
- break; \
- case 8: \
- __ustq(val, __gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (void)0; \
-})
-
-#endif /* _ASM_GENERIC_UNALIGNED_H */
diff --git a/include/asm-h8300/unaligned.h b/include/asm-h8300/unaligned.h
index ffb67f4..e8ff49d 100644
--- a/include/asm-h8300/unaligned.h
+++ b/include/asm-h8300/unaligned.h
@@ -1,15 +1,6 @@
#ifndef __H8300_UNALIGNED_H
#define __H8300_UNALIGNED_H
-
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
+#include <linux/unaligned/no_builtin_memcpy.h>
#endif
diff --git a/include/asm-ia64/unaligned.h b/include/asm-ia64/unaligned.h
index bb85598..2134205 100644
--- a/include/asm-ia64/unaligned.h
+++ b/include/asm-ia64/unaligned.h
@@ -1,6 +1,6 @@
#ifndef _ASM_IA64_UNALIGNED_H
#define _ASM_IA64_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
#endif /* _ASM_IA64_UNALIGNED_H */
diff --git a/include/asm-m32r/unaligned.h b/include/asm-m32r/unaligned.h
index fccc180..5a4c931 100644
--- a/include/asm-m32r/unaligned.h
+++ b/include/asm-m32r/unaligned.h
@@ -1,19 +1,6 @@
#ifndef _ASM_M32R_UNALIGNED_H
#define _ASM_M32R_UNALIGNED_H
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- */
-
-#include <asm/string.h>
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
+#include <linux/unaligned/no_builtin_memcpy.h>
#endif /* _ASM_M32R_UNALIGNED_H */
diff --git a/include/asm-m68k/unaligned.h b/include/asm-m68k/unaligned.h
index 804cb3f..94b4a77 100644
--- a/include/asm-m68k/unaligned.h
+++ b/include/asm-m68k/unaligned.h
@@ -3,14 +3,7 @@
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif
diff --git a/include/asm-m68knommu/unaligned.h b/include/asm-m68knommu/unaligned.h
index 869e9dd..6b5c7a2 100644
--- a/include/asm-m68knommu/unaligned.h
+++ b/include/asm-m68knommu/unaligned.h
@@ -4,19 +4,13 @@
#ifdef CONFIG_COLDFIRE
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#else
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif
diff --git a/include/asm-mips/unaligned.h b/include/asm-mips/unaligned.h
index 3249049..471e127 100644
--- a/include/asm-mips/unaligned.h
+++ b/include/asm-mips/unaligned.h
@@ -5,25 +5,16 @@
*
* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
*/
-#ifndef __ASM_GENERIC_UNALIGNED_H
-#define __ASM_GENERIC_UNALIGNED_H
+#ifndef __ASM_MIPS_UNALIGNED_H
+#define __ASM_MIPS_UNALIGNED_H
#include <linux/compiler.h>
+#if defined(__MIPSEB__)
+# include <linux/unaligned/generic_be.h>
+#elif defined(__MIPSEL__)
+# include <linux/unaligned/generic_le.h>
+#else
+# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
+#endif
-#define get_unaligned(ptr) \
-({ \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v = (val); \
-} while(0)
-
-#endif /* __ASM_GENERIC_UNALIGNED_H */
+#endif /* __ASM_MIPS_UNALIGNED_H */
diff --git a/include/asm-mn10300/unaligned.h b/include/asm-mn10300/unaligned.h
index cad3afb..c377ba0 100644
--- a/include/asm-mn10300/unaligned.h
+++ b/include/asm-mn10300/unaligned.h
@@ -8,129 +8,9 @@
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
+#ifndef _ASM_MN10300_UNALIGNED_H
+#define _ASM_MN10300_UNALIGNED_H
-#include <asm/types.h>
-
-#if 0
-extern int __bug_unaligned_x(void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
-({ \
- unsigned int __v1, __v2; \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
-})
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p + 4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val, ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: \
- __put_unaligned_2((val), (__u8 *)(ptr)); \
- break; \
- case 4: \
- __put_unaligned_4((val), (__u8 *)(ptr)); \
- break; \
- case 8: \
- __put_unaligned_8((val), (__u8 *)(ptr)); \
- break; \
- default: \
- __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-
-#else
-
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ({ *(ptr) = (val); (void) 0; })
-
-#endif
+#include <linux/unaligned/access_ok.h>
#endif
diff --git a/include/asm-parisc/unaligned.h b/include/asm-parisc/unaligned.h
index 53c9058..865867c 100644
--- a/include/asm-parisc/unaligned.h
+++ b/include/asm-parisc/unaligned.h
@@ -1,7 +1,7 @@
#ifndef _ASM_PARISC_UNALIGNED_H_
#define _ASM_PARISC_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#ifdef __KERNEL__
struct pt_regs;
diff --git a/include/asm-powerpc/unaligned.h b/include/asm-powerpc/unaligned.h
index 6c95dfa..59bcc21 100644
--- a/include/asm-powerpc/unaligned.h
+++ b/include/asm-powerpc/unaligned.h
@@ -5,15 +5,8 @@
/*
* The PowerPC can do unaligned accesses itself in big endian mode.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_UNALIGNED_H */
diff --git a/include/asm-s390/unaligned.h b/include/asm-s390/unaligned.h
index 8ee86db..1d4a684 100644
--- a/include/asm-s390/unaligned.h
+++ b/include/asm-s390/unaligned.h
@@ -11,14 +11,7 @@
/*
* The S390 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif
diff --git a/include/asm-sh/unaligned.h b/include/asm-sh/unaligned.h
index 5250e30..391da8d 100644
--- a/include/asm-sh/unaligned.h
+++ b/include/asm-sh/unaligned.h
@@ -2,6 +2,10 @@
#define __ASM_SH_UNALIGNED_H
/* SH can't handle unaligned accesses. */
-#include <asm-generic/unaligned.h>
+#ifdef __LITTLE_ENDIAN__
+#include <linux/unaligned/generic_le.h>
+#else
+#include <linux/unaligned/generic_be.h>
+#endif
#endif /* __ASM_SH_UNALIGNED_H */
diff --git a/include/asm-sparc/unaligned.h b/include/asm-sparc/unaligned.h
index b6f8edd..9f1bb56 100644
--- a/include/asm-sparc/unaligned.h
+++ b/include/asm-sparc/unaligned.h
@@ -1,6 +1,6 @@
#ifndef _ASM_SPARC_UNALIGNED_H_
#define _ASM_SPARC_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#endif /* _ASM_SPARC_UNALIGNED_H */
diff --git a/include/asm-sparc64/unaligned.h b/include/asm-sparc64/unaligned.h
index 1ed3ba5..faa18cd 100644
--- a/include/asm-sparc64/unaligned.h
+++ b/include/asm-sparc64/unaligned.h
@@ -1,6 +1,6 @@
#ifndef _ASM_SPARC64_UNALIGNED_H_
#define _ASM_SPARC64_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#endif /* _ASM_SPARC64_UNALIGNED_H */
diff --git a/include/asm-v850/unaligned.h b/include/asm-v850/unaligned.h
index e30b186..09fc37c 100644
--- a/include/asm-v850/unaligned.h
+++ b/include/asm-v850/unaligned.h
@@ -17,114 +17,9 @@
#ifndef __V850_UNALIGNED_H__
#define __V850_UNALIGNED_H__
-#include <asm/types.h>
-
-extern int __bug_unaligned_x(void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
- ({ \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: { \
- unsigned int __v1, __v2; \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- } \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
- })
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p+4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val,ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2((val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4((val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8((val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
#endif /* __V850_UNALIGNED_H__ */
diff --git a/include/asm-x86/unaligned.h b/include/asm-x86/unaligned.h
index 913598d..7ba2e1a 100644
--- a/include/asm-x86/unaligned.h
+++ b/include/asm-x86/unaligned.h
@@ -3,35 +3,7 @@
/*
* The x86 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-/**
- * get_unaligned - get value from possibly mis-aligned location
- * @ptr: pointer to value
- *
- * This macro should be used for accessing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. retrieving a u16 value from a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define get_unaligned(ptr) (*(ptr))
-
-/**
- * put_unaligned - put value to a possibly mis-aligned location
- * @val: value to place
- * @ptr: pointer to location
- *
- * This macro should be used for placing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. writing a u16 value to a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif /* _ASM_X86_UNALIGNED_H */
diff --git a/include/asm-xtensa/unaligned.h b/include/asm-xtensa/unaligned.h
index 2822089..45eb203 100644
--- a/include/asm-xtensa/unaligned.h
+++ b/include/asm-xtensa/unaligned.h
@@ -13,16 +13,6 @@
#ifndef _XTENSA_UNALIGNED_H
#define _XTENSA_UNALIGNED_H
-#include <linux/string.h>
-
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
+#include <linux/unaligned/no_builtin_memcpy.h>
#endif /* _XTENSA_UNALIGNED_H */
--
1.5.5.144.g3e42
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 3:38 [PATCH 2/2] kernel: Move arches to use common unaligned access Harvey Harrison
@ 2008-04-11 7:48 ` Ingo Molnar
2008-04-11 10:11 ` David Howells
1 sibling, 0 replies; 9+ messages in thread
From: Ingo Molnar @ 2008-04-11 7:48 UTC (permalink / raw)
To: Harvey Harrison
Cc: Andrew Morton, LKML, David Howells, linux-arch, Linus Torvalds
* Harvey Harrison <harvey.harrison@gmail.com> wrote:
> diff --git a/include/asm-x86/unaligned.h b/include/asm-x86/unaligned.h
> index 913598d..7ba2e1a 100644
> --- a/include/asm-x86/unaligned.h
> +++ b/include/asm-x86/unaligned.h
nice work - the x86 bits and the general concept:
Acked-by: Ingo Molnar <mingo@elte.hu>
Ingo
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 3:38 [PATCH 2/2] kernel: Move arches to use common unaligned access Harvey Harrison
2008-04-11 7:48 ` Ingo Molnar
@ 2008-04-11 10:11 ` David Howells
2008-04-11 10:16 ` David Miller
2008-04-11 15:19 ` Harvey Harrison
1 sibling, 2 replies; 9+ messages in thread
From: David Howells @ 2008-04-11 10:11 UTC (permalink / raw)
To: Harvey Harrison; +Cc: dhowells, Andrew Morton, LKML, linux-arch, Linus Torvalds
Harvey Harrison <harvey.harrison@gmail.com> wrote:
> -#ifndef _ASM_UNALIGNED_H
> -#define _ASM_UNALIGNED_H
> -
> +#ifndef _ASM_FRV_UNALIGNED_H_
> +#define _ASM_FRV_UNALIGNED_H_
Why?
> - * impractical. So, now we fall back to using memcpy.
> + * impractical. So, now we fall back to using memmov.
That's memmove, not memmov. Any why memmove, not memcpy? Is __tmp likely to
overlap with *ptr?
Also, for FRV, I think calling memmove/memcpy for MMU kernels may be the wrong
thing to do... I'm sort of leaning towards doing the same thing as NOMMU
kernels and just using your inline ones.
The advantage of the inline ones is that they are quicker and probably involve
fewer instructions executed; whereas using memcpy/memmove may end up with
smaller, but slower code. Hmmm... Maybe key on CONFIG_CC_OPTIMIZE_FOR_SIZE?
David
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 10:11 ` David Howells
@ 2008-04-11 10:16 ` David Miller
2008-04-11 10:27 ` David Howells
2008-04-11 15:19 ` Harvey Harrison
1 sibling, 1 reply; 9+ messages in thread
From: David Miller @ 2008-04-11 10:16 UTC (permalink / raw)
To: dhowells; +Cc: harvey.harrison, akpm, linux-kernel, linux-arch, torvalds
From: David Howells <dhowells@redhat.com>
Date: Fri, 11 Apr 2008 11:11:28 +0100
> Harvey Harrison <harvey.harrison@gmail.com> wrote:
>
> > - * impractical. So, now we fall back to using memcpy.
> > + * impractical. So, now we fall back to using memmov.
>
> That's memmove, not memmov. Any why memmove, not memcpy? Is __tmp likely to
> overlap with *ptr?
No, I think it has something to do with what cases GCC is allowed to
optimize the call inline and what cases it cannot wrt. alignment of
datums.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 10:16 ` David Miller
@ 2008-04-11 10:27 ` David Howells
0 siblings, 0 replies; 9+ messages in thread
From: David Howells @ 2008-04-11 10:27 UTC (permalink / raw)
To: David Miller
Cc: dhowells, harvey.harrison, akpm, linux-kernel, linux-arch,
torvalds
David Miller <davem@davemloft.net> wrote:
> No, I think it has something to do with what cases GCC is allowed to
> optimize the call inline and what cases it cannot wrt. alignment of
> datums.
As he says in his comment, in fact.
David
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 10:11 ` David Howells
2008-04-11 10:16 ` David Miller
@ 2008-04-11 15:19 ` Harvey Harrison
2008-04-11 15:50 ` David Howells
1 sibling, 1 reply; 9+ messages in thread
From: Harvey Harrison @ 2008-04-11 15:19 UTC (permalink / raw)
To: David Howells; +Cc: Andrew Morton, LKML, linux-arch, Linus Torvalds
On Fri, 2008-04-11 at 11:11 +0100, David Howells wrote:
> Harvey Harrison <harvey.harrison@gmail.com> wrote:
>
> > -#ifndef _ASM_UNALIGNED_H
> > -#define _ASM_UNALIGNED_H
> > -
> > +#ifndef _ASM_FRV_UNALIGNED_H_
> > +#define _ASM_FRV_UNALIGNED_H_
>
> Why?
Consistency with every other arch..no other reason.
>
> > - * impractical. So, now we fall back to using memcpy.
> > + * impractical. So, now we fall back to using memmov.
>
> That's memmove, not memmov. Any why memmove, not memcpy? Is __tmp likely to
> overlap with *ptr?
>
> Also, for FRV, I think calling memmove/memcpy for MMU kernels may be the wrong
> thing to do... I'm sort of leaning towards doing the same thing as NOMMU
> kernels and just using your inline ones.
OK, just let me know what you decide. I'm stil open to bringing back
the frv asm versions if the do end up being faster.
>
> The advantage of the inline ones is that they are quicker and probably involve
> fewer instructions executed; whereas using memcpy/memmove may end up with
> smaller, but slower code. Hmmm... Maybe key on CONFIG_CC_OPTIMIZE_FOR_SIZE?
>
I suppose an out-of-line version could be easily added to accomplish
this. It would be identical to the byteshifting implementation-wise.
Let me know if you'd like me to spin such a patch.
Harvey
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 15:19 ` Harvey Harrison
@ 2008-04-11 15:50 ` David Howells
2008-04-11 17:31 ` Harvey Harrison
2008-04-11 17:55 ` [PATCH 2/2-revised] " Harvey Harrison
0 siblings, 2 replies; 9+ messages in thread
From: David Howells @ 2008-04-11 15:50 UTC (permalink / raw)
To: Harvey Harrison; +Cc: dhowells, Andrew Morton, LKML, linux-arch, Linus Torvalds
Harvey Harrison <harvey.harrison@gmail.com> wrote:
> Consistency with every other arch..no other reason.
But not M68K(NOMMU), Alpha, Blackfin, Cris, H8300, MN10300, ..., but generally
consistent with the other FRV headers (some other people have added differ).
Hmmm... It looks like MIPS is weird. That says __ASM_GENERIC_UNALIGNED_H,
which is probably wrong.
David
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2] kernel: Move arches to use common unaligned access
2008-04-11 15:50 ` David Howells
@ 2008-04-11 17:31 ` Harvey Harrison
2008-04-11 17:55 ` [PATCH 2/2-revised] " Harvey Harrison
1 sibling, 0 replies; 9+ messages in thread
From: Harvey Harrison @ 2008-04-11 17:31 UTC (permalink / raw)
To: David Howells; +Cc: Andrew Morton, LKML, linux-arch, Linus Torvalds
On Fri, 2008-04-11 at 16:50 +0100, David Howells wrote:
> Harvey Harrison <harvey.harrison@gmail.com> wrote:
>
> > Consistency with every other arch..no other reason.
>
> But not M68K(NOMMU), Alpha, Blackfin, Cris, H8300, MN10300, ..., but generally
> consistent with the other FRV headers (some other people have added differ).
>
> Hmmm... It looks like MIPS is weird. That says __ASM_GENERIC_UNALIGNED_H,
> which is probably wrong.
>
> David
Well, now's the time to decide on something as I'm changing every arch.
What is the general pattern used for this kind of thing? Or am I just
asking what color to paint this bikeshed?
Harvey
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 2/2-revised] kernel: Move arches to use common unaligned access
2008-04-11 15:50 ` David Howells
2008-04-11 17:31 ` Harvey Harrison
@ 2008-04-11 17:55 ` Harvey Harrison
1 sibling, 0 replies; 9+ messages in thread
From: Harvey Harrison @ 2008-04-11 17:55 UTC (permalink / raw)
To: David Howells; +Cc: Andrew Morton, LKML, linux-arch, Linus Torvalds
Unaligned access is ok for the following arches:
cris, m68k, mn10300, powerpc, s390, x86
Arches that use the no-builtin-memcpy implementation:
h8300, m32r, xtensa
generic_le:
alpha, blackfin, ia64,
generic_be:
parisc, sparc, sparc64
generic_le or be, choice based on compiler flags:
mips, sh
m86knommu is generic_be for Coldfire, otherwise unaligned access is ok.
frv uses the no_builtin_memcpy implementation when there is an MMU
configured, otherwise uses the generic be byteshifting version.
arm chooses endianness based on compiler settings, uses the byteshifting
versions.
v850 is le, uses the byteshifting versions for both be and le.
Remove the now unused asm-generic implementation.
[revised: standardize #ifdef testing across arches _ASM_ARCH_UNALIGNED_H_ ]
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
include/asm-alpha/unaligned.h | 8 +-
include/asm-arm/unaligned.h | 172 +---------------------------------
include/asm-avr32/unaligned.h | 8 +-
include/asm-blackfin/unaligned.h | 8 +-
include/asm-cris/unaligned.h | 14 +--
include/asm-frv/unaligned.h | 184 ++-----------------------------------
include/asm-generic/unaligned.h | 124 -------------------------
include/asm-h8300/unaligned.h | 17 +---
include/asm-ia64/unaligned.h | 8 +-
include/asm-m32r/unaligned.h | 21 +----
include/asm-m68k/unaligned.h | 15 +--
include/asm-m68knommu/unaligned.h | 16 +--
include/asm-mips/unaligned.h | 29 ++----
include/asm-mn10300/unaligned.h | 128 +-------------------------
include/asm-parisc/unaligned.h | 2 +-
include/asm-powerpc/unaligned.h | 15 +--
include/asm-s390/unaligned.h | 15 +--
include/asm-sh/unaligned.h | 12 ++-
include/asm-sparc/unaligned.h | 4 +-
include/asm-sparc64/unaligned.h | 4 +-
include/asm-um/unaligned.h | 6 +-
include/asm-v850/unaligned.h | 117 +----------------------
include/asm-x86/unaligned.h | 36 +-------
include/asm-xtensa/unaligned.h | 18 +---
24 files changed, 102 insertions(+), 879 deletions(-)
diff --git a/include/asm-alpha/unaligned.h b/include/asm-alpha/unaligned.h
index a1d7284..2e241f7 100644
--- a/include/asm-alpha/unaligned.h
+++ b/include/asm-alpha/unaligned.h
@@ -1,6 +1,6 @@
-#ifndef __ALPHA_UNALIGNED_H
-#define __ALPHA_UNALIGNED_H
+#ifndef _ASM_ALPHA_UNALIGNED_H_
+#define _ASM_ALPHA_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
-#endif
+#endif /* _ASM_ALPHA_UNALIGNED_H_ */
diff --git a/include/asm-arm/unaligned.h b/include/asm-arm/unaligned.h
index 5db03cf..dc9f327 100644
--- a/include/asm-arm/unaligned.h
+++ b/include/asm-arm/unaligned.h
@@ -1,171 +1,7 @@
-#ifndef __ASM_ARM_UNALIGNED_H
-#define __ASM_ARM_UNALIGNED_H
+#ifndef _ASM_ARM_UNALIGNED_H_
+#define _ASM_ARM_UNALIGNED_H_
-#include <asm/types.h>
-
-extern int __bug_unaligned_x(const void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8)
-
-#define __get_unaligned_2_be(__p) \
- (unsigned int)(__p[0] << 8 | __p[1])
-
-#define __get_unaligned_4_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define __get_unaligned_4_be(__p) \
- (unsigned int)(__p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3])
-
-#define __get_unaligned_8_le(__p) \
- ((unsigned long long)__get_unaligned_4_le((__p+4)) << 32 | \
- __get_unaligned_4_le(__p))
-
-#define __get_unaligned_8_be(__p) \
- ((unsigned long long)__get_unaligned_4_be(__p) << 32 | \
- __get_unaligned_4_be((__p+4)))
-
-#define __get_unaligned_le(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_le(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-#define __get_unaligned_be(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_be(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-
-static inline void __put_unaligned_2_le(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_2_be(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v >> 8;
- *__p++ = __v;
-}
-
-static inline void __put_unaligned_4_le(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_le(__v >> 16, __p + 2);
- __put_unaligned_2_le(__v, __p);
-}
-
-static inline void __put_unaligned_4_be(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_be(__v >> 16, __p);
- __put_unaligned_2_be(__v, __p + 2);
-}
-
-static inline void __put_unaligned_8_le(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_le(__v >> 32, __p+4);
- __put_unaligned_4_le(__v, __p);
-}
-
-static inline void __put_unaligned_8_be(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_be(__v >> 32, __p);
- __put_unaligned_4_be(__v, __p+4);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define __put_unaligned_le(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_le((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_le((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_le((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-#define __put_unaligned_be(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_be((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_be((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_be((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
+#include <linux/unaligned/generic.h>
/*
* Select endianness
@@ -178,4 +14,4 @@ static inline void __put_unaligned_8_be(const unsigned long long __v, register _
#define put_unaligned __put_unaligned_be
#endif
-#endif
+#endif /* _ASM_ARM_UNALIGNED_H_ */
diff --git a/include/asm-avr32/unaligned.h b/include/asm-avr32/unaligned.h
index 36f5fd4..5008d9b 100644
--- a/include/asm-avr32/unaligned.h
+++ b/include/asm-avr32/unaligned.h
@@ -1,5 +1,5 @@
-#ifndef __ASM_AVR32_UNALIGNED_H
-#define __ASM_AVR32_UNALIGNED_H
+#ifndef _ASM_AVR32_UNALIGNED_H_
+#define _ASM_AVR32_UNALIGNED_H_
/*
* AVR32 can handle some unaligned accesses, depending on the
@@ -11,6 +11,6 @@
* optimize word loads in general.
*/
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
-#endif /* __ASM_AVR32_UNALIGNED_H */
+#endif /* _ASM_AVR32_UNALIGNED_H_ */
diff --git a/include/asm-blackfin/unaligned.h b/include/asm-blackfin/unaligned.h
index 10081dc..3328e24 100644
--- a/include/asm-blackfin/unaligned.h
+++ b/include/asm-blackfin/unaligned.h
@@ -1,6 +1,6 @@
-#ifndef __BFIN_UNALIGNED_H
-#define __BFIN_UNALIGNED_H
+#ifndef _ASM_BLACKFIN_UNALIGNED_H_
+#define _ASM_BLACKFIN_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
-#endif /* __BFIN_UNALIGNED_H */
+#endif /* _ASM_BLACKFIN_UNALIGNED_H_ */
diff --git a/include/asm-cris/unaligned.h b/include/asm-cris/unaligned.h
index 7fbbb39..daa1b91 100644
--- a/include/asm-cris/unaligned.h
+++ b/include/asm-cris/unaligned.h
@@ -1,16 +1,10 @@
-#ifndef __CRIS_UNALIGNED_H
-#define __CRIS_UNALIGNED_H
+#ifndef _ASM_CRIS_UNALIGNED_H_
+#define _ASM_CRIS_UNALIGNED_H_
/*
* CRIS can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-#define get_unaligned(ptr) (*(ptr))
+#include <linux/unaligned/access_ok.h>
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif
+#endif /* _ASM_CRIS_UNALIGNED_H_ */
diff --git a/include/asm-frv/unaligned.h b/include/asm-frv/unaligned.h
index dc8e9c9..ff01156 100644
--- a/include/asm-frv/unaligned.h
+++ b/include/asm-frv/unaligned.h
@@ -9,9 +9,8 @@
* 2 of the License, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
-
+#ifndef _ASM_FRV_UNALIGNED_H_
+#define _ASM_FRV_UNALIGNED_H_
/*
* Unaligned accesses on uClinux can't be performed in a fault handler - the
@@ -19,184 +18,19 @@
*
* With the FR451, however, they are precise, and so we used to fix them up in
* the memory access fault handler. However, instruction bundling make this
- * impractical. So, now we fall back to using memcpy.
+ * impractical. So, now we fall back to using memmov.
*/
#ifdef CONFIG_MMU
-/*
- * The asm statement in the macros below is a way to get GCC to copy a
- * value from one variable to another without having any clue it's
- * actually doing so, so that it won't have any idea that the values
- * in the two variables are related.
- */
-
-#define get_unaligned(ptr) ({ \
- typeof((*(ptr))) __x; \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(&__x, __ptrcopy, sizeof(*(ptr))); \
- __x; \
-})
-
-#define put_unaligned(val, ptr) ({ \
- typeof((*(ptr))) __x = (val); \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(__ptrcopy, &__x, sizeof(*(ptr))); \
-})
-
+#include <linux/unaligned/no_builtin_memcpy.h>
extern int handle_misalignment(unsigned long esr0, unsigned long ear0, unsigned long epcr0);
#else
-#define get_unaligned(ptr) \
-({ \
- typeof(*(ptr)) x; \
- const char *__p = (const char *) (ptr); \
- \
- switch (sizeof(x)) { \
- case 1: \
- x = *(ptr); \
- break; \
- case 2: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I4.p %M4,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I5.p %M5,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- union { uint64_t x; u32 y[2]; } z; \
- uint8_t a; \
- asm(" ldub%I3 %M3,%0 \n" \
- " ldub%I4.p %M4,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I5.p %M5,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I6.p %M6,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I7 %M7,%1 \n" \
- " ldub%I8.p %M8,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I9.p %M9,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I10.p %M10,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- : "=&r"(z.y[0]), "=&r"(z.y[1]), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]), \
- "m"(__p[4]), "m"(__p[5]), "m"(__p[6]), "m"(__p[7]) \
- ); \
- x = z.x; \
- break; \
- } \
- \
- default: \
- x = 0; \
- BUG(); \
- break; \
- } \
- \
- x; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- char *__p = (char *) (ptr); \
- int x; \
- \
- switch (sizeof(*ptr)) { \
- case 2: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2 %0,%M2 \n" \
- : "=r"(x), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4 %0,%M4 \n" \
- : "=r"(x), "=m"(__p[3]), "=m"(__p[2]), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- uint32_t __high, __low; \
- __high = (uint64_t)val >> 32; \
- __low = val & 0xffffffff; \
- asm(" stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4.p %0,%M4 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I5.p %0,%M5 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I6.p %1,%M6 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I7.p %1,%M7 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I8.p %1,%M8 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I9 %1,%M9 \n" \
- : "=&r"(__low), "=&r"(__high), "=m"(__p[7]), "=m"(__p[6]), \
- "=m"(__p[5]), "=m"(__p[4]), "=m"(__p[3]), "=m"(__p[2]), \
- "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(__low), "1"(__high) \
- ); \
- break; \
- } \
- \
- default: \
- *(ptr) = (val); \
- break; \
- } \
-} while(0)
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#endif
+#endif /* CONFIG_MMU */
-#endif
+#endif /* _ASM_FRV_UNALIGNED_H_ */
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
deleted file mode 100644
index 2fe1b2e..0000000
--- a/include/asm-generic/unaligned.h
+++ /dev/null
@@ -1,124 +0,0 @@
-#ifndef _ASM_GENERIC_UNALIGNED_H_
-#define _ASM_GENERIC_UNALIGNED_H_
-
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- *
- * This is based almost entirely upon Richard Henderson's
- * asm-alpha/unaligned.h implementation. Some comments were
- * taken from David Mosberger's asm-ia64/unaligned.h header.
- */
-
-#include <linux/types.h>
-
-/*
- * The main single-value unaligned transfer routines.
- */
-#define get_unaligned(ptr) \
- __get_unaligned((ptr), sizeof(*(ptr)))
-#define put_unaligned(x,ptr) \
- ((void)sizeof(*(ptr)=(x)),\
- __put_unaligned((__force __u64)(x), (ptr), sizeof(*(ptr))))
-
-/*
- * This function doesn't actually exist. The idea is that when
- * someone uses the macros below with an unsupported size (datatype),
- * the linker will alert us to the problem via an unresolved reference
- * error.
- */
-extern void bad_unaligned_access_length(void) __attribute__((noreturn));
-
-struct __una_u64 { __u64 x __attribute__((packed)); };
-struct __una_u32 { __u32 x __attribute__((packed)); };
-struct __una_u16 { __u16 x __attribute__((packed)); };
-
-/*
- * Elemental unaligned loads
- */
-
-static inline __u64 __uldq(const __u64 *addr)
-{
- const struct __una_u64 *ptr = (const struct __una_u64 *) addr;
- return ptr->x;
-}
-
-static inline __u32 __uldl(const __u32 *addr)
-{
- const struct __una_u32 *ptr = (const struct __una_u32 *) addr;
- return ptr->x;
-}
-
-static inline __u16 __uldw(const __u16 *addr)
-{
- const struct __una_u16 *ptr = (const struct __una_u16 *) addr;
- return ptr->x;
-}
-
-/*
- * Elemental unaligned stores
- */
-
-static inline void __ustq(__u64 val, __u64 *addr)
-{
- struct __una_u64 *ptr = (struct __una_u64 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustl(__u32 val, __u32 *addr)
-{
- struct __una_u32 *ptr = (struct __una_u32 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustw(__u16 val, __u16 *addr)
-{
- struct __una_u16 *ptr = (struct __una_u16 *) addr;
- ptr->x = val;
-}
-
-#define __get_unaligned(ptr, size) ({ \
- const void *__gu_p = ptr; \
- __u64 __val; \
- switch (size) { \
- case 1: \
- __val = *(const __u8 *)__gu_p; \
- break; \
- case 2: \
- __val = __uldw(__gu_p); \
- break; \
- case 4: \
- __val = __uldl(__gu_p); \
- break; \
- case 8: \
- __val = __uldq(__gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (__force __typeof__(*(ptr)))__val; \
-})
-
-#define __put_unaligned(val, ptr, size) \
-({ \
- void *__gu_p = ptr; \
- switch (size) { \
- case 1: \
- *(__u8 *)__gu_p = (__force __u8)val; \
- break; \
- case 2: \
- __ustw((__force __u16)val, __gu_p); \
- break; \
- case 4: \
- __ustl((__force __u32)val, __gu_p); \
- break; \
- case 8: \
- __ustq(val, __gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (void)0; \
-})
-
-#endif /* _ASM_GENERIC_UNALIGNED_H */
diff --git a/include/asm-h8300/unaligned.h b/include/asm-h8300/unaligned.h
index ffb67f4..f32b266 100644
--- a/include/asm-h8300/unaligned.h
+++ b/include/asm-h8300/unaligned.h
@@ -1,15 +1,6 @@
-#ifndef __H8300_UNALIGNED_H
-#define __H8300_UNALIGNED_H
+#ifndef _ASM_H8300_UNALIGNED_H_
+#define _ASM_H8300_UNALIGNED_H_
+#include <linux/unaligned/no_builtin_memcpy.h>
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
-
-#endif
+#endif /* _ASM_H8300_UNALIGNED_H_ */
diff --git a/include/asm-ia64/unaligned.h b/include/asm-ia64/unaligned.h
index bb85598..451768e 100644
--- a/include/asm-ia64/unaligned.h
+++ b/include/asm-ia64/unaligned.h
@@ -1,6 +1,6 @@
-#ifndef _ASM_IA64_UNALIGNED_H
-#define _ASM_IA64_UNALIGNED_H
+#ifndef _ASM_IA64_UNALIGNED_H_
+#define _ASM_IA64_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_le.h>
-#endif /* _ASM_IA64_UNALIGNED_H */
+#endif /* _ASM_IA64_UNALIGNED_H_ */
diff --git a/include/asm-m32r/unaligned.h b/include/asm-m32r/unaligned.h
index fccc180..618c737 100644
--- a/include/asm-m32r/unaligned.h
+++ b/include/asm-m32r/unaligned.h
@@ -1,19 +1,6 @@
-#ifndef _ASM_M32R_UNALIGNED_H
-#define _ASM_M32R_UNALIGNED_H
+#ifndef _ASM_M32R_UNALIGNED_H_
+#define _ASM_M32R_UNALIGNED_H_
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- */
+#include <linux/unaligned/no_builtin_memcpy.h>
-#include <asm/string.h>
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
-
-#endif /* _ASM_M32R_UNALIGNED_H */
+#endif /* _ASM_M32R_UNALIGNED_H_ */
diff --git a/include/asm-m68k/unaligned.h b/include/asm-m68k/unaligned.h
index 804cb3f..71209d8 100644
--- a/include/asm-m68k/unaligned.h
+++ b/include/asm-m68k/unaligned.h
@@ -1,16 +1,9 @@
-#ifndef __M68K_UNALIGNED_H
-#define __M68K_UNALIGNED_H
+#ifndef _ASM_M68K_UNALIGNED_H_
+#define _ASM_M68K_UNALIGNED_H_
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif
+#endif /* _ASM_M68K_UNALIGNED_H_ */
diff --git a/include/asm-m68knommu/unaligned.h b/include/asm-m68knommu/unaligned.h
index 869e9dd..65d9464 100644
--- a/include/asm-m68knommu/unaligned.h
+++ b/include/asm-m68knommu/unaligned.h
@@ -1,23 +1,17 @@
-#ifndef __M68K_UNALIGNED_H
-#define __M68K_UNALIGNED_H
+#ifndef _ASM_M68KNOMMU_UNALIGNED_H_
+#define _ASM_M68KNOMMU_UNALIGNED_H_
#ifdef CONFIG_COLDFIRE
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#else
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif
-#endif
+#endif /* _ASM_M68KNOMMU_UNALIGNED_H_ */
diff --git a/include/asm-mips/unaligned.h b/include/asm-mips/unaligned.h
index 3249049..1cb8ce7 100644
--- a/include/asm-mips/unaligned.h
+++ b/include/asm-mips/unaligned.h
@@ -5,25 +5,16 @@
*
* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
*/
-#ifndef __ASM_GENERIC_UNALIGNED_H
-#define __ASM_GENERIC_UNALIGNED_H
+#ifndef _ASM_MIPS_UNALIGNED_H_
+#define _ASM_MIPS_UNALIGNED_H_
#include <linux/compiler.h>
+#if defined(__MIPSEB__)
+# include <linux/unaligned/generic_be.h>
+#elif defined(__MIPSEL__)
+# include <linux/unaligned/generic_le.h>
+#else
+# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
+#endif
-#define get_unaligned(ptr) \
-({ \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v = (val); \
-} while(0)
-
-#endif /* __ASM_GENERIC_UNALIGNED_H */
+#endif /* _ASM_MIPS_UNALIGNED_H_ */
diff --git a/include/asm-mn10300/unaligned.h b/include/asm-mn10300/unaligned.h
index cad3afb..517a9f7 100644
--- a/include/asm-mn10300/unaligned.h
+++ b/include/asm-mn10300/unaligned.h
@@ -8,129 +8,9 @@
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
+#ifndef _ASM_MN10300_UNALIGNED_H_
+#define _ASM_MN10300_UNALIGNED_H_
-#include <asm/types.h>
+#include <linux/unaligned/access_ok.h>
-#if 0
-extern int __bug_unaligned_x(void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
-({ \
- unsigned int __v1, __v2; \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
-})
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p + 4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val, ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: \
- __put_unaligned_2((val), (__u8 *)(ptr)); \
- break; \
- case 4: \
- __put_unaligned_4((val), (__u8 *)(ptr)); \
- break; \
- case 8: \
- __put_unaligned_8((val), (__u8 *)(ptr)); \
- break; \
- default: \
- __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-
-#else
-
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ({ *(ptr) = (val); (void) 0; })
-
-#endif
-
-#endif
+#endif /* _ASM_MN10300_UNALIGNED_H_ */
diff --git a/include/asm-parisc/unaligned.h b/include/asm-parisc/unaligned.h
index 53c9058..865867c 100644
--- a/include/asm-parisc/unaligned.h
+++ b/include/asm-parisc/unaligned.h
@@ -1,7 +1,7 @@
#ifndef _ASM_PARISC_UNALIGNED_H_
#define _ASM_PARISC_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
#ifdef __KERNEL__
struct pt_regs;
diff --git a/include/asm-powerpc/unaligned.h b/include/asm-powerpc/unaligned.h
index 6c95dfa..4b443a3 100644
--- a/include/asm-powerpc/unaligned.h
+++ b/include/asm-powerpc/unaligned.h
@@ -1,19 +1,12 @@
-#ifndef _ASM_POWERPC_UNALIGNED_H
-#define _ASM_POWERPC_UNALIGNED_H
+#ifndef _ASM_POWERPC_UNALIGNED_H_
+#define _ASM_POWERPC_UNALIGNED_H_
#ifdef __KERNEL__
/*
* The PowerPC can do unaligned accesses itself in big endian mode.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#include <linux/unaligned/access_ok.h>
#endif /* __KERNEL__ */
-#endif /* _ASM_POWERPC_UNALIGNED_H */
+#endif /* _ASM_POWERPC_UNALIGNED_H_ */
diff --git a/include/asm-s390/unaligned.h b/include/asm-s390/unaligned.h
index 8ee86db..85047d7 100644
--- a/include/asm-s390/unaligned.h
+++ b/include/asm-s390/unaligned.h
@@ -6,19 +6,12 @@
* Derived from "include/asm-i386/unaligned.h"
*/
-#ifndef __S390_UNALIGNED_H
-#define __S390_UNALIGNED_H
+#ifndef _ASM_S390_UNALIGNED_H_
+#define _ASM_S390_UNALIGNED_H_
/*
* The S390 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif
+#endif /* _ASM_S390_UNALIGNED_H_ */
diff --git a/include/asm-sh/unaligned.h b/include/asm-sh/unaligned.h
index 5250e30..dc9055c 100644
--- a/include/asm-sh/unaligned.h
+++ b/include/asm-sh/unaligned.h
@@ -1,7 +1,11 @@
-#ifndef __ASM_SH_UNALIGNED_H
-#define __ASM_SH_UNALIGNED_H
+#ifndef _ASM_SH_UNALIGNED_H_
+#define _ASM_SH_UNALIGNED_H_
/* SH can't handle unaligned accesses. */
-#include <asm-generic/unaligned.h>
+#ifdef __LITTLE_ENDIAN__
+#include <linux/unaligned/generic_le.h>
+#else
+#include <linux/unaligned/generic_be.h>
+#endif
-#endif /* __ASM_SH_UNALIGNED_H */
+#endif /* _ASM_SH_UNALIGNED_H_ */
diff --git a/include/asm-sparc/unaligned.h b/include/asm-sparc/unaligned.h
index b6f8edd..4a6b228 100644
--- a/include/asm-sparc/unaligned.h
+++ b/include/asm-sparc/unaligned.h
@@ -1,6 +1,6 @@
#ifndef _ASM_SPARC_UNALIGNED_H_
#define _ASM_SPARC_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
-#endif /* _ASM_SPARC_UNALIGNED_H */
+#endif /* _ASM_SPARC_UNALIGNED_H_ */
diff --git a/include/asm-sparc64/unaligned.h b/include/asm-sparc64/unaligned.h
index 1ed3ba5..8069e1e 100644
--- a/include/asm-sparc64/unaligned.h
+++ b/include/asm-sparc64/unaligned.h
@@ -1,6 +1,6 @@
#ifndef _ASM_SPARC64_UNALIGNED_H_
#define _ASM_SPARC64_UNALIGNED_H_
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/generic_be.h>
-#endif /* _ASM_SPARC64_UNALIGNED_H */
+#endif /* _ASM_SPARC64_UNALIGNED_H_ */
diff --git a/include/asm-um/unaligned.h b/include/asm-um/unaligned.h
index 1d2497c..bc2cc11 100644
--- a/include/asm-um/unaligned.h
+++ b/include/asm-um/unaligned.h
@@ -1,6 +1,6 @@
-#ifndef __UM_UNALIGNED_H
-#define __UM_UNALIGNED_H
+#ifndef _ASM_UM_UNALIGNED_H_
+#define _ASM_UM_UNALIGNED_H_
#include "asm/arch/unaligned.h"
-#endif
+#endif /* _ASM_UM_UNALIGNED_H_ */
diff --git a/include/asm-v850/unaligned.h b/include/asm-v850/unaligned.h
index e30b186..aee4cf6 100644
--- a/include/asm-v850/unaligned.h
+++ b/include/asm-v850/unaligned.h
@@ -14,117 +14,12 @@
* annoying to use.
*/
-#ifndef __V850_UNALIGNED_H__
-#define __V850_UNALIGNED_H__
+#ifndef _ASM_V850_UNALIGNED_H_
+#define _ASM_V850_UNALIGNED_H_
-#include <asm/types.h>
+#include <linux/unaligned/generic.h>
-extern int __bug_unaligned_x(void *ptr);
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
- ({ \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: { \
- unsigned int __v1, __v2; \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- } \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
- })
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p+4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val,ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2((val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4((val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8((val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-
-#endif /* __V850_UNALIGNED_H__ */
+#endif /* _ASM_V850_UNALIGNED_H_ */
diff --git a/include/asm-x86/unaligned.h b/include/asm-x86/unaligned.h
index 913598d..1696bc0 100644
--- a/include/asm-x86/unaligned.h
+++ b/include/asm-x86/unaligned.h
@@ -1,37 +1,9 @@
-#ifndef _ASM_X86_UNALIGNED_H
-#define _ASM_X86_UNALIGNED_H
+#ifndef _ASM_X86_UNALIGNED_H_
+#define _ASM_X86_UNALIGNED_H_
/*
* The x86 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
-/**
- * get_unaligned - get value from possibly mis-aligned location
- * @ptr: pointer to value
- *
- * This macro should be used for accessing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. retrieving a u16 value from a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define get_unaligned(ptr) (*(ptr))
-
-/**
- * put_unaligned - put value to a possibly mis-aligned location
- * @val: value to place
- * @ptr: pointer to location
- *
- * This macro should be used for placing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. writing a u16 value to a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif /* _ASM_X86_UNALIGNED_H */
+#endif /* _ASM_X86_UNALIGNED_H_ */
diff --git a/include/asm-xtensa/unaligned.h b/include/asm-xtensa/unaligned.h
index 2822089..6222cc4 100644
--- a/include/asm-xtensa/unaligned.h
+++ b/include/asm-xtensa/unaligned.h
@@ -10,19 +10,9 @@
* Copyright (C) 2001 - 2005 Tensilica Inc.
*/
-#ifndef _XTENSA_UNALIGNED_H
-#define _XTENSA_UNALIGNED_H
+#ifndef _ASM_XTENSA_UNALIGNED_H_
+#define _ASM_XTENSA_UNALIGNED_H_
-#include <linux/string.h>
+#include <linux/unaligned/no_builtin_memcpy.h>
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
-
-#endif /* _XTENSA_UNALIGNED_H */
+#endif /* _ASM_XTENSA_UNALIGNED_H_ */
--
1.5.5.144.g3e42
^ permalink raw reply related [flat|nested] 9+ messages in thread
end of thread, other threads:[~2008-04-11 17:55 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-04-11 3:38 [PATCH 2/2] kernel: Move arches to use common unaligned access Harvey Harrison
2008-04-11 7:48 ` Ingo Molnar
2008-04-11 10:11 ` David Howells
2008-04-11 10:16 ` David Miller
2008-04-11 10:27 ` David Howells
2008-04-11 15:19 ` Harvey Harrison
2008-04-11 15:50 ` David Howells
2008-04-11 17:31 ` Harvey Harrison
2008-04-11 17:55 ` [PATCH 2/2-revised] " Harvey Harrison
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