Messages in this thread Patch in this message | | | Date | Thu, 26 Jan 2006 12:38:41 +0900 | Subject | [PATCH 11/12] generic ext2_{set,clear}_bit_atomic() | From | (Akinobu Mita) |
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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);
HAVE_ARCH_EXT2_ATOMIC_BITOPS is defined when the architecture has its own version of these functions.
This code largely copied from: include/asm-sparc/bitops.h
Index: 2.6-git/include/asm-generic/bitops.h =================================================================== --- 2.6-git.orig/include/asm-generic/bitops.h 2006-01-25 19:14:11.000000000 +0900 +++ 2.6-git/include/asm-generic/bitops.h 2006-01-25 19:14:12.000000000 +0900 @@ -645,6 +645,28 @@ #endif /* HAVE_ARCH_EXT2_NON_ATOMIC_BITOPS */ +#ifndef HAVE_ARCH_EXT2_ATOMIC_BITOPS + +#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 /* HAVE_ARCH_EXT2_ATOMIC_BITOPS */ + #endif /* __KERNEL__ */ #endif /* _ASM_GENERIC_BITOPS_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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