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asm-generic: add another generic ext2 atomic bitops 

The majority of architectures implement ext2 atomic bitops as
test_and_{set,clear}_bit() without spinlock.

This adds this type of generic implementation in ext2-atomic-setbit.h and
use it wherever possible.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Suggested-by: Andreas Dilger <adilger@dilger.ca>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2011-07-26 16:09:04 -07:00 committed by Linus Torvalds
parent b2c9cd3793
commit 148817ba09
15 changed files with 28 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/alpha/include/asm/bitops.h
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@ -456,8 +456,7 @@ sched_find_first_bit(const unsigned long b[2])
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

5
arch/arm/include/asm/bitops.h
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@ -310,10 +310,7 @@ static inline int find_next_bit_le(const void *p, int size, int offset)
/*
* Ext2 is defined to use little-endian byte ordering.
*/
#define ext2_set_bit_atomic(lock, nr, p) \
test_and_set_bit_le(nr, p)
#define ext2_clear_bit_atomic(lock, nr, p) \
test_and_clear_bit_le(nr, p)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

3
arch/cris/include/asm/bitops.h
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@ -156,8 +156,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#include <asm-generic/bitops/sched.h>

3
arch/frv/include/asm/bitops.h
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@ -403,8 +403,7 @@ int __ilog2_u64(u64 n)
#include <asm-generic/bitops/le.h>
#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))
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

3
arch/ia64/include/asm/bitops.h
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@ -458,8 +458,7 @@ static __inline__ unsigned long __arch_hweight64(unsigned long x)
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#include <asm-generic/bitops/sched.h>

7
arch/mn10300/include/asm/bitops.h
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@ -227,12 +227,7 @@ int ffs(int x)
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/hweight.h>
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit((nr), (addr))
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit((nr), (addr))
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#include <asm-generic/bitops/le.h>
#endif /* __KERNEL__ */

9
arch/parisc/include/asm/bitops.h
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@ -223,14 +223,7 @@ static __inline__ int fls(int x)
#ifdef __KERNEL__
#include <asm-generic/bitops/le.h>
/* '3' is bits per byte */
#define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
#define ext2_set_bit_atomic(l,nr,addr) \
test_and_set_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
#define ext2_clear_bit_atomic(l,nr,addr) \
test_and_clear_bit( (nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

5
arch/powerpc/include/asm/bitops.h
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@ -327,10 +327,7 @@ unsigned long find_next_bit_le(const void *addr,
unsigned long size, unsigned long offset);
/* Bitmap functions for the ext2 filesystem */
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit_le((nr), (unsigned long*)addr)
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit_le((nr), (unsigned long*)addr)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#include <asm-generic/bitops/sched.h>

5
arch/s390/include/asm/bitops.h
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@ -832,10 +832,7 @@ static inline int find_next_bit_le(void *vaddr, unsigned long size,
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit_le(nr, addr)
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit_le(nr, addr)
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

5
arch/sparc/include/asm/bitops_64.h
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@ -91,10 +91,7 @@ static inline unsigned int __arch_hweight8(unsigned int w)
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(lock,nr,addr) \
test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr))
#define ext2_clear_bit_atomic(lock,nr,addr) \
test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr))
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */

5
arch/tile/include/asm/bitops_64.h
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@ -97,9 +97,6 @@ static inline int test_and_change_bit(unsigned nr,
return (oldval & mask) != 0;
}
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit((nr), (unsigned long *)(addr))
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit((nr), (unsigned long *)(addr))
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* _ASM_TILE_BITOPS_64_H */

5
arch/x86/include/asm/bitops.h
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@ -458,10 +458,7 @@ static inline int fls(int x)
#include <asm-generic/bitops/le.h>
#define ext2_set_bit_atomic(lock, nr, addr) \
test_and_set_bit((nr), (unsigned long *)(addr))
#define ext2_clear_bit_atomic(lock, nr, addr) \
test_and_clear_bit((nr), (unsigned long *)(addr))
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */
#endif /* _ASM_X86_BITOPS_H */

14
arch/xtensa/include/asm/bitops.h
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@ -108,19 +108,7 @@ static inline unsigned long __fls(unsigned long word)
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/le.h>
#ifdef __XTENSA_EL__
# define ext2_set_bit_atomic(lock,nr,addr) \
test_and_set_bit((nr), (unsigned long*)(addr))
# define ext2_clear_bit_atomic(lock,nr,addr) \
test_and_clear_bit((nr), (unsigned long*)(addr))
#elif defined(__XTENSA_EB__)
# define ext2_set_bit_atomic(lock,nr,addr) \
test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
# define ext2_clear_bit_atomic(lock,nr,addr) \
test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
#else
# error processor byte order undefined!
#endif
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>

11
include/asm-generic/bitops/ext2-atomic-setbit.h Normal file
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@ -0,0 +1,11 @@
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
/*
* Atomic bitops based version of ext2 atomic bitops
*/
#define ext2_set_bit_atomic(l, nr, addr) test_and_set_bit_le(nr, addr)
#define ext2_clear_bit_atomic(l, nr, addr) test_and_clear_bit_le(nr, addr)
#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ */

4
include/asm-generic/bitops/ext2-atomic.h
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@ -1,6 +1,10 @@
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
/*
* Spinlock based version of ext2 atomic bitops
*/
#define ext2_set_bit_atomic(lock, nr, addr) \
({ \
int ret; \