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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
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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; \