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| author | Alexander van Heukelum <heukelum@mailshack.com> | 2008-04-01 11:46:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-26 19:21:16 +0200 |
| commit | 77b9bd9c49442407804c37bcc82021a35277f83c (patch) | |
| tree | 251900d95c6c9c5371542d5dda7d89cb31cd0801 /include/asm-x86 | |
| parent | d57594c203b1e7b54373080a797f0cbfa4aade68 (diff) | |
| download | linux-77b9bd9c49442407804c37bcc82021a35277f83c.tar.bz2 | |
x86: generic versions of find_first_(zero_)bit, convert i386
Generic versions of __find_first_bit and __find_first_zero_bit
are introduced as simplified versions of __find_next_bit and
__find_next_zero_bit. Their compilation and use are guarded by
a new config variable GENERIC_FIND_FIRST_BIT.
The generic versions of find_first_bit and find_first_zero_bit
are implemented in terms of the newly introduced __find_first_bit
and __find_first_zero_bit.
This patch does not remove the i386-specific implementation,
but it does switch i386 to use the generic functions by setting
GENERIC_FIND_FIRST_BIT=y for X86_32.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/bitops_32.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86/bitops_32.h b/include/asm-x86/bitops_32.h index 3ed64b21b765..ba2c0defafa8 100644 --- a/include/asm-x86/bitops_32.h +++ b/include/asm-x86/bitops_32.h @@ -5,6 +5,7 @@ * Copyright 1992, Linus Torvalds. */ +#ifndef CONFIG_GENERIC_FIND_FIRST_BIT /** * find_first_zero_bit - find the first zero bit in a memory region * @addr: The address to start the search at @@ -59,6 +60,7 @@ static inline unsigned find_first_bit(const unsigned long *addr, unsigned size) } return x; } +#endif #ifdef __KERNEL__ |