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authorAkinobu Mita <mita@miraclelinux.com>2006-03-26 13:39:16 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-26 20:57:11 +0400
commit765f34fe324bdf0c0544b3404d25aaa511e3834b (patch)
tree073161aa7c213b15e0d3be6d99a2649de3030e00 /include/asm-generic/bitops
parent930ae745f50088279fdc06057a429f16495b53a2 (diff)
downloadlinux-765f34fe324bdf0c0544b3404d25aaa511e3834b.tar.xz
[PATCH] bitops: generic ext2_{set,clear}_bit_atomic()
This patch introduces the C-language equivalents of the functions below: int ext2_set_bit_atomic(int nr, volatile unsigned long *addr); int ext2_clear_bit_atomic(int nr, volatile unsigned long *addr); In include/asm-generic/bitops/ext2-atomic.h This code largely copied from: include/asm-sparc/bitops.h Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic/bitops')
-rw-r--r--include/asm-generic/bitops/ext2-atomic.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-generic/bitops/ext2-atomic.h b/include/asm-generic/bitops/ext2-atomic.h
new file mode 100644
index 000000000000..ab1c875efb74
--- /dev/null
+++ b/include/asm-generic/bitops/ext2-atomic.h
@@ -0,0 +1,22 @@
+#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
+#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
+
+#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; \
+ })
+
+#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ */