[patch 35/44] sparc: use generic bitops

Akinobu Mita
2006-02-01T09:08:30Z

[-- Attachment #1: sparc.patch --]
[-- Type: text/plain, Size: 10746 bytes --]

- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove __ffs()
- remove sched_find_first_bit()
- remove ffs()
- remove generic_fls()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove ext2_{set,clear}_bit_atomic()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
include/asm-sparc/bitops.h | 388 +--------------------------------------------
1 files changed, 12 insertions(+), 376 deletions(-)

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
@@ -152,386 +152,22 @@ static inline void change_bit(unsigned l
: "memory", "cc");
}

-/*
- * non-atomic versions
- */
-static inline void __set_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
-
- *p |= mask;
-}
-
-static inline void __clear_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
-
- *p &= ~mask;
-}
-
-static inline void __change_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
-
- *p ^= mask;
-}
-
-static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
- unsigned long old = *p;
-
- *p = old | mask;
- return (old & mask) != 0;
-}
-
-static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
- unsigned long old = *p;
-
- *p = old & ~mask;
- return (old & mask) != 0;
-}
-
-static inline int __test_and_change_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = 1UL << (nr & 0x1f);
- unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
- unsigned long old = *p;
-
- *p = old ^ mask;
- return (old & mask) != 0;
-}
+#include <asm-generic/bitops/non-atomic.h>

#define smp_mb__before_clear_bit() do { } while(0)
#define smp_mb__after_clear_bit() do { } while(0)

-/* The following routine need not be atomic. */
-static inline int test_bit(int nr, __const__ volatile unsigned long *addr)
-{
- return (1UL & (((unsigned long *)addr)[nr >> 5] >> (nr & 31))) != 0UL;
-}
-
-/* The easy/cheese version for now. */
-static inline unsigned long ffz(unsigned long word)
-{
- unsigned long result = 0;
-
- while(word & 1) {
- result++;
- word >>= 1;
- }
- return result;
-}
-
-/**
- * __ffs - find first bit in word.
- * @word: The word to search
- *
- * Undefined if no bit exists, so code should check against 0 first.
- */
-static inline int __ffs(unsigned long word)
-{
- int num = 0;
-
- if ((word & 0xffff) == 0) {
- num += 16;
- word >>= 16;
- }
- if ((word & 0xff) == 0) {
- num += 8;
- word >>= 8;
- }
- if ((word & 0xf) == 0) {
- num += 4;
- word >>= 4;
- }
- if ((word & 0x3) == 0) {
- num += 2;
- word >>= 2;
- }
- if ((word & 0x1) == 0)
- num += 1;
- return num;
-}
-
-/*
- * Every architecture must define this function. It's the fastest
- * way of searching a 140-bit bitmap where the first 100 bits are
- * unlikely to be set. It's guaranteed that at least one of the 140
- * bits is cleared.
- */
-static inline int sched_find_first_bit(unsigned long *b)
-{
-
- if (unlikely(b[0]))
- return __ffs(b[0]);
- if (unlikely(b[1]))
- return __ffs(b[1]) + 32;
- if (unlikely(b[2]))
- return __ffs(b[2]) + 64;
- if (b[3])
- return __ffs(b[3]) + 96;
- return __ffs(b[4]) + 128;
-}
-
-/*
- * ffs: find first bit set. This is defined the same way as
- * the libc and compiler builtin ffs routines, therefore
- * differs in spirit from the above ffz (man ffs).
- */
-static inline int ffs(int x)
-{
- if (!x)
- return 0;
- return __ffs((unsigned long)x) + 1;
-}
-
-/*
- * fls: find last (most-significant) bit set.
- * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
- */
-#define fls(x) generic_fls(x)
-#define fls64(x) generic_fls64(x)
-
-/*
- * hweightN: returns the hamming weight (i.e. the number
- * of bits set) of a N-bit word
- */
-#define hweight32(x) generic_hweight32(x)
-#define hweight16(x) generic_hweight16(x)
-#define hweight8(x) generic_hweight8(x)
-
-/*
- * find_next_zero_bit() finds the first zero bit in a bit string of length
- * 'size' bits, starting the search at bit 'offset'. This is largely based
- * on Linus's ALPHA routines, which are pretty portable BTW.
- */
-static inline unsigned long find_next_zero_bit(const unsigned long *addr,
- unsigned long size, unsigned long offset)
-{
- const unsigned long *p = addr + (offset >> 5);
- unsigned long result = offset & ~31UL;
- unsigned long tmp;
-
- if (offset >= size)
- return size;
- size -= result;
- offset &= 31UL;
- if (offset) {
- tmp = *(p++);
- tmp |= ~0UL >> (32-offset);
- if (size < 32)
- goto found_first;
- if (~tmp)
- goto found_middle;
- size -= 32;
- result += 32;
- }
- while (size & ~31UL) {
- if (~(tmp = *(p++)))
- goto found_middle;
- result += 32;
- size -= 32;
- }
- if (!size)
- return result;
- tmp = *p;
-
-found_first:
- tmp |= ~0UL << size;
- if (tmp == ~0UL) /* Are any bits zero? */
- return result + size; /* Nope. */
-found_middle:
- return result + ffz(tmp);
-}
-
-/*
- * Linus sez that gcc can optimize the following correctly, we'll see if this
- * holds on the Sparc as it does for the ALPHA.
- */
-#define find_first_zero_bit(addr, size) \
- find_next_zero_bit((addr), (size), 0)
-
-/**
- * find_next_bit - find the first set bit in a memory region
- * @addr: The address to base the search on
- * @offset: The bitnumber to start searching at
- * @size: The maximum size to search
- *
- * Scheduler induced bitop, do not use.
- */
-static inline int find_next_bit(const unsigned long *addr, int size, int offset)
-{
- const unsigned long *p = addr + (offset >> 5);
- int num = offset & ~0x1f;
- unsigned long word;
-
- word = *p++;
- word &= ~((1 << (offset & 0x1f)) - 1);
- while (num < size) {
- if (word != 0) {
- return __ffs(word) + num;
- }
- word = *p++;
- num += 0x20;
- }
- return num;
-}
-
-/**
- * find_first_bit - find the first set bit in a memory region
- * @addr: The address to start the search at
- * @size: The maximum size to search
- *
- * Returns the bit-number of the first set bit, not the number of the byte
- * containing a bit.
- */
-#define find_first_bit(addr, size) \
- find_next_bit((addr), (size), 0)
-
-/*
- */
-static inline int test_le_bit(int nr, __const__ unsigned long * addr)
-{
- __const__ unsigned char *ADDR = (__const__ unsigned char *) addr;
- return (ADDR[nr >> 3] >> (nr & 7)) & 1;
-}
-
-/*
- * non-atomic versions
- */
-static inline void __set_le_bit(int nr, unsigned long *addr)
-{
- unsigned char *ADDR = (unsigned char *)addr;
-
- ADDR += nr >> 3;
- *ADDR |= 1 << (nr & 0x07);
-}
-
-static inline void __clear_le_bit(int nr, unsigned long *addr)
-{
- unsigned char *ADDR = (unsigned char *)addr;
-
- ADDR += nr >> 3;
- *ADDR &= ~(1 << (nr & 0x07));
-}
-
-static inline int __test_and_set_le_bit(int nr, unsigned long *addr)
-{
- int mask, retval;
- unsigned char *ADDR = (unsigned char *)addr;
-
- ADDR += nr >> 3;
- mask = 1 << (nr & 0x07);
- retval = (mask & *ADDR) != 0;
- *ADDR |= mask;
- return retval;
-}
-
-static inline int __test_and_clear_le_bit(int nr, unsigned long *addr)
-{
- int mask, retval;
- unsigned char *ADDR = (unsigned char *)addr;
-
- ADDR += nr >> 3;
- mask = 1 << (nr & 0x07);
- retval = (mask & *ADDR) != 0;
- *ADDR &= ~mask;
- return retval;
-}
-
-static inline unsigned long find_next_zero_le_bit(const unsigned long *addr,
- unsigned long size, unsigned long offset)
-{
- const unsigned long *p = addr + (offset >> 5);
- unsigned long result = offset & ~31UL;
- unsigned long tmp;
-
- if (offset >= size)
- return size;
- size -= result;
- offset &= 31UL;
- if(offset) {
- tmp = *(p++);
- tmp |= __swab32(~0UL >> (32-offset));
- if(size < 32)
- goto found_first;
- if(~tmp)
- goto found_middle;
- size -= 32;
- result += 32;
- }
- while(size & ~31UL) {
- if(~(tmp = *(p++)))
- goto found_middle;
- result += 32;
- size -= 32;
- }
- if(!size)
- return result;
- tmp = *p;
-
-found_first:
- tmp = __swab32(tmp) | (~0UL << size);
- if (tmp == ~0UL) /* Are any bits zero? */
- return result + size; /* Nope. */
- return result + ffz(tmp);
-
-found_middle:
- return result + ffz(__swab32(tmp));
-}
-
-#define find_first_zero_le_bit(addr, size) \
- find_next_zero_le_bit((addr), (size), 0)
-
-#define ext2_set_bit(nr,addr) \
- __test_and_set_le_bit((nr),(unsigned long *)(addr))
-#define ext2_clear_bit(nr,addr) \
- __test_and_clear_le_bit((nr),(unsigned long *)(addr))
-
-#define ext2_set_bit_atomic(lock, nr, addr) \
- ({ \
- int ret; \
- spin_lock(lock); \
- ret = ext2_set_bit((nr), (unsigned long *)(addr)); \
- spin_unlock(lock); \
- ret; \
- })
-
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- ({ \
- int ret; \
- spin_lock(lock); \
- ret = ext2_clear_bit((nr), (unsigned long *)(addr)); \
- spin_unlock(lock); \
- ret; \
- })
-
-#define ext2_test_bit(nr,addr) \
- test_le_bit((nr),(unsigned long *)(addr))
-#define ext2_find_first_zero_bit(addr, size) \
- find_first_zero_le_bit((unsigned long *)(addr), (size))
-#define ext2_find_next_zero_bit(addr, size, off) \
- find_next_zero_le_bit((unsigned long *)(addr), (size), (off))
-
-/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) \
- __test_and_set_bit((nr),(unsigned long *)(addr))
-#define minix_set_bit(nr,addr) \
- __set_bit((nr),(unsigned long *)(addr))
-#define minix_test_and_clear_bit(nr,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) \
- find_first_zero_bit((unsigned long *)(addr),(size))
+#include <asm-generic/bitops/ffz.h>
+#include <asm-generic/bitops/__ffs.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/ffs.h>
+#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/ext2-non-atomic.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+#include <asm-generic/bitops/minix.h>

#endif /* __KERNEL__ */

--