[patch 04/44] use non atomic operations for minix_*_bit() and ext2_*_bit()

Akinobu Mita
2006-02-01T09:02:28Z

Bitmap functions for the minix filesystem and the ext2 filesystem do not
require the atomic guarantees except ext2_set_bit_atomic() and
ext2_clear_bit_atomic().

But these are defined by using atomic bit operations on several architectures.
(cris, frv, h8300, ia64, m32r, m68k, m68knommu, mips, s390, sh, sh64, sparc,
sparc64, v850, and xtensa)

This patch switches to non atomic bit operation.

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>

include/asm-cris/bitops.h | 8 ++++----
include/asm-frv/bitops.h | 14 +++++++-------
include/asm-h8300/bitops.h | 6 +++---
include/asm-ia64/bitops.h | 10 +++++-----
include/asm-m32r/bitops.h | 2 +-
include/asm-m68k/bitops.h | 10 +++++-----
include/asm-m68knommu/bitops.h | 6 +++---
include/asm-mips/bitops.h | 6 +++---
include/asm-s390/bitops.h | 10 +++++-----
include/asm-sh/bitops.h | 16 +++++-----------
include/asm-sh64/bitops.h | 16 +++++-----------
include/asm-sparc/bitops.h | 6 +++---
include/asm-sparc64/bitops.h | 6 +++---
include/asm-v850/bitops.h | 10 +++++-----
include/asm-xtensa/bitops.h | 6 +++---
15 files changed, 60 insertions(+), 72 deletions(-)

Index: 2.6-git/include/asm-h8300/bitops.h
=================================--- 2.6-git.orig/include/asm-h8300/bitops.h
+++ 2.6-git/include/asm-h8300/bitops.h
@@ -397,9 +397,9 @@ found_middle:
}

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-ia64/bitops.h
=================================--- 2.6-git.orig/include/asm-ia64/bitops.h
+++ 2.6-git/include/asm-ia64/bitops.h
@@ -394,18 +394,18 @@ extern int __find_next_bit(const void *a

#define __clear_bit(nr, addr) clear_bit(nr, addr)

-#define ext2_set_bit test_and_set_bit
+#define ext2_set_bit __test_and_set_bit
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit test_and_clear_bit
+#define ext2_clear_bit __test_and_clear_bit
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#define ext2_test_bit test_bit
#define ext2_find_first_zero_bit find_first_zero_bit
#define ext2_find_next_zero_bit find_next_zero_bit

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-mips/bitops.h
=================================--- 2.6-git.orig/include/asm-mips/bitops.h
+++ 2.6-git/include/asm-mips/bitops.h
@@ -956,9 +956,9 @@ found_middle:
* FIXME: These assume that Minix uses the native byte/bitorder.
* This limits the Minix filesystem's value for data exchange very much.
*/
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-s390/bitops.h
=================================--- 2.6-git.orig/include/asm-s390/bitops.h
+++ 2.6-git/include/asm-s390/bitops.h
@@ -871,11 +871,11 @@ static inline int sched_find_first_bit(u
*/

#define ext2_set_bit(nr, addr) \
- test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
+ __test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_clear_bit(nr, addr) \
- test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
+ __test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
#define ext2_test_bit(nr, addr) \
@@ -1014,11 +1014,11 @@ ext2_find_next_zero_bit(void *vaddr, uns
/* Bitmap functions for the minix filesystem. */
/* FIXME !!! */
#define minix_test_and_set_bit(nr,addr) \
- test_and_set_bit(nr,(unsigned long *)addr)
+ __test_and_set_bit(nr,(unsigned long *)addr)
#define minix_set_bit(nr,addr) \
- set_bit(nr,(unsigned long *)addr)
+ __set_bit(nr,(unsigned long *)addr)
#define minix_test_and_clear_bit(nr,addr) \
- test_and_clear_bit(nr,(unsigned long *)addr)
+ __test_and_clear_bit(nr,(unsigned long *)addr)
#define minix_test_bit(nr,addr) \
test_bit(nr,(unsigned long *)addr)
#define minix_find_first_zero_bit(addr,size) \
Index: 2.6-git/include/asm-sh/bitops.h
=================================--- 2.6-git.orig/include/asm-sh/bitops.h
+++ 2.6-git/include/asm-sh/bitops.h
@@ -339,8 +339,8 @@ static inline int sched_find_first_bit(c
}

#ifdef __LITTLE_ENDIAN__
-#define ext2_set_bit(nr, addr) test_and_set_bit((nr), (addr))
-#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr), (addr))
+#define ext2_set_bit(nr, addr) __test_and_set_bit((nr), (addr))
+#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr), (addr))
#define ext2_test_bit(nr, addr) test_bit((nr), (addr))
#define ext2_find_first_zero_bit(addr, size) find_first_zero_bit((addr), (size))
#define ext2_find_next_zero_bit(addr, size, offset) \
@@ -349,30 +349,24 @@ static inline int sched_find_first_bit(c
static __inline__ int ext2_set_bit(int nr, volatile void * addr)
{
int mask, retval;
- unsigned long flags;
volatile unsigned char *ADDR = (unsigned char *) addr;

ADDR += nr >> 3;
mask = 1 << (nr & 0x07);
- local_irq_save(flags);
retval = (mask & *ADDR) != 0;
*ADDR |= mask;
- local_irq_restore(flags);
return retval;
}

static __inline__ int ext2_clear_bit(int nr, volatile void * addr)
{
int mask, retval;
- unsigned long flags;
volatile unsigned char *ADDR = (unsigned char *) addr;

ADDR += nr >> 3;
mask = 1 << (nr & 0x07);
- local_irq_save(flags);
retval = (mask & *ADDR) != 0;
*ADDR &= ~mask;
- local_irq_restore(flags);
return retval;
}

@@ -459,9 +453,9 @@ found_middle:
})

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-sh64/bitops.h
=================================--- 2.6-git.orig/include/asm-sh64/bitops.h
+++ 2.6-git/include/asm-sh64/bitops.h
@@ -382,8 +382,8 @@ static inline int sched_find_first_bit(u
#define hweight8(x) generic_hweight8(x)

#ifdef __LITTLE_ENDIAN__
-#define ext2_set_bit(nr, addr) test_and_set_bit((nr), (addr))
-#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr), (addr))
+#define ext2_set_bit(nr, addr) __test_and_set_bit((nr), (addr))
+#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr), (addr))
#define ext2_test_bit(nr, addr) test_bit((nr), (addr))
#define ext2_find_first_zero_bit(addr, size) find_first_zero_bit((addr), (size))
#define ext2_find_next_zero_bit(addr, size, offset) \
@@ -392,30 +392,24 @@ static inline int sched_find_first_bit(u
static __inline__ int ext2_set_bit(int nr, volatile void * addr)
{
int mask, retval;
- unsigned long flags;
volatile unsigned char *ADDR = (unsigned char *) addr;

ADDR += nr >> 3;
mask = 1 << (nr & 0x07);
- local_irq_save(flags);
retval = (mask & *ADDR) != 0;
*ADDR |= mask;
- local_irq_restore(flags);
return retval;
}

static __inline__ int ext2_clear_bit(int nr, volatile void * addr)
{
int mask, retval;
- unsigned long flags;
volatile unsigned char *ADDR = (unsigned char *) addr;

ADDR += nr >> 3;
mask = 1 << (nr & 0x07);
- local_irq_save(flags);
retval = (mask & *ADDR) != 0;
*ADDR &= ~mask;
- local_irq_restore(flags);
return retval;
}

@@ -502,9 +496,9 @@ found_middle:
})

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-sparc/bitops.h
=================================--- 2.6-git.orig/include/asm-sparc/bitops.h
+++ 2.6-git/include/asm-sparc/bitops.h
@@ -523,11 +523,11 @@ found_middle:

/* Bitmap functions for the minix filesystem. */
#define minix_test_and_set_bit(nr,addr) \
- test_and_set_bit((nr),(unsigned long *)(addr))
+ __test_and_set_bit((nr),(unsigned long *)(addr))
#define minix_set_bit(nr,addr) \
- set_bit((nr),(unsigned long *)(addr))
+ __set_bit((nr),(unsigned long *)(addr))
#define minix_test_and_clear_bit(nr,addr) \
- test_and_clear_bit((nr),(unsigned long *)(addr))
+ __test_and_clear_bit((nr),(unsigned long *)(addr))
#define minix_test_bit(nr,addr) \
test_bit((nr),(unsigned long *)(addr))
#define minix_find_first_zero_bit(addr,size) \
Index: 2.6-git/include/asm-sparc64/bitops.h
=================================--- 2.6-git.orig/include/asm-sparc64/bitops.h
+++ 2.6-git/include/asm-sparc64/bitops.h
@@ -280,11 +280,11 @@ extern unsigned long find_next_zero_le_b

/* Bitmap functions for the minix filesystem. */
#define minix_test_and_set_bit(nr,addr) \
- test_and_set_bit((nr),(unsigned long *)(addr))
+ __test_and_set_bit((nr),(unsigned long *)(addr))
#define minix_set_bit(nr,addr) \
- set_bit((nr),(unsigned long *)(addr))
+ __set_bit((nr),(unsigned long *)(addr))
#define minix_test_and_clear_bit(nr,addr) \
- test_and_clear_bit((nr),(unsigned long *)(addr))
+ __test_and_clear_bit((nr),(unsigned long *)(addr))
#define minix_test_bit(nr,addr) \
test_bit((nr),(unsigned long *)(addr))
#define minix_find_first_zero_bit(addr,size) \
Index: 2.6-git/include/asm-v850/bitops.h
=================================--- 2.6-git.orig/include/asm-v850/bitops.h
+++ 2.6-git/include/asm-v850/bitops.h
@@ -336,18 +336,18 @@ static inline int sched_find_first_bit(u
#define hweight16(x) generic_hweight16 (x)
#define hweight8(x) generic_hweight8 (x)

-#define ext2_set_bit test_and_set_bit
+#define ext2_set_bit __test_and_set_bit
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit test_and_clear_bit
+#define ext2_clear_bit __test_and_clear_bit
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#define ext2_test_bit test_bit
#define ext2_find_first_zero_bit find_first_zero_bit
#define ext2_find_next_zero_bit find_next_zero_bit

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit test_and_set_bit
-#define minix_set_bit set_bit
-#define minix_test_and_clear_bit test_and_clear_bit
+#define minix_test_and_set_bit __test_and_set_bit
+#define minix_set_bit __set_bit
+#define minix_test_and_clear_bit __test_and_clear_bit
#define minix_test_bit test_bit
#define minix_find_first_zero_bit find_first_zero_bit

Index: 2.6-git/include/asm-xtensa/bitops.h
=================================--- 2.6-git.orig/include/asm-xtensa/bitops.h
+++ 2.6-git/include/asm-xtensa/bitops.h
@@ -436,9 +436,9 @@ static inline int sched_find_first_bit(c

/* Bitmap functions for the minix filesystem. */

-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-m32r/bitops.h
=================================--- 2.6-git.orig/include/asm-m32r/bitops.h
+++ 2.6-git/include/asm-m32r/bitops.h
@@ -575,7 +575,7 @@ found_middle:
*/

#ifdef __LITTLE_ENDIAN__
-#define ext2_set_bit test_and_set_bit
+#define ext2_set_bit __test_and_set_bit
#define ext2_clear_bit __test_and_clear_bit
#define ext2_test_bit test_bit
#define ext2_find_first_zero_bit find_first_zero_bit
Index: 2.6-git/include/asm-cris/bitops.h
=================================--- 2.6-git.orig/include/asm-cris/bitops.h
+++ 2.6-git/include/asm-cris/bitops.h
@@ -352,17 +352,17 @@ found_middle:
#define find_first_bit(addr, size) \
find_next_bit((addr), (size), 0)

-#define ext2_set_bit test_and_set_bit
+#define ext2_set_bit __test_and_set_bit
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit test_and_clear_bit
+#define ext2_clear_bit __test_and_clear_bit
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#define ext2_test_bit test_bit
#define ext2_find_first_zero_bit find_first_zero_bit
#define ext2_find_next_zero_bit find_next_zero_bit

/* Bitmap functions for the minix filesystem. */
-#define minix_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-frv/bitops.h
=================================--- 2.6-git.orig/include/asm-frv/bitops.h
+++ 2.6-git/include/asm-frv/bitops.h
@@ -259,11 +259,11 @@ static inline int sched_find_first_bit(c
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)

-#define ext2_set_bit(nr, addr) test_and_set_bit ((nr) ^ 0x18, (addr))
-#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr) ^ 0x18, (addr))
+#define ext2_set_bit(nr, addr) __test_and_set_bit ((nr) ^ 0x18, (addr))
+#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 0x18, (addr))

-#define ext2_set_bit_atomic(lock,nr,addr) ext2_set_bit((nr), addr)
-#define ext2_clear_bit_atomic(lock,nr,addr) ext2_clear_bit((nr), addr)
+#define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit ((nr) ^ 0x18, (addr))
+#define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr) ^ 0x18, (addr))

static inline int ext2_test_bit(int nr, const volatile void * addr)
{
@@ -331,9 +331,9 @@ found_middle:
}

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) ext2_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) ext2_set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) ext2_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit ((nr) ^ 0x18, (addr))
+#define minix_set_bit(nr,addr) __set_bit((nr) ^ 0x18, (addr))
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit((nr) ^ 0x18, (addr))
#define minix_test_bit(nr,addr) ext2_test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) ext2_find_first_zero_bit(addr,size)

Index: 2.6-git/include/asm-m68k/bitops.h
=================================--- 2.6-git.orig/include/asm-m68k/bitops.h
+++ 2.6-git/include/asm-m68k/bitops.h
@@ -365,9 +365,9 @@ static inline int minix_find_first_zero_
return ((p - addr) << 4) + (res ^ 31);
}

-#define minix_test_and_set_bit(nr, addr) test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
-#define minix_set_bit(nr,addr) set_bit((nr) ^ 16, (unsigned long *)(addr))
-#define minix_test_and_clear_bit(nr, addr) test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_test_and_set_bit(nr, addr) __test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_set_bit(nr,addr) __set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))

static inline int minix_test_bit(int nr, const void *vaddr)
{
@@ -377,9 +377,9 @@ static inline int minix_test_bit(int nr,

/* Bitmap functions for the ext2 filesystem. */

-#define ext2_set_bit(nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
+#define ext2_set_bit(nr, addr) __test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
#define ext2_set_bit_atomic(lock, nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
-#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
+#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
#define ext2_clear_bit_atomic(lock, nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))

static inline int ext2_test_bit(int nr, const void *vaddr)
Index: 2.6-git/include/asm-m68knommu/bitops.h
=================================--- 2.6-git.orig/include/asm-m68knommu/bitops.h
+++ 2.6-git/include/asm-m68knommu/bitops.h
@@ -476,9 +476,9 @@ found_middle:
}

/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) __set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)

--