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mn10300: define __fls

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Like fls, but can't be handed 0 and returns the bit number.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell
2009-01-03 16:19:03 +10:30
parent 16a206260e
commit 5c134dad43
1 changed files with 11 additions and 0 deletions
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11
include/asm-mn10300/bitops.h
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@@ -195,6 +195,17 @@ int fls(int x)
return (x != 0) ? __ilog2_u32(x) + 1 : 0; return (x != 0) ? __ilog2_u32(x) + 1 : 0;
} }
/**
* __fls - find last (most-significant) set bit in a long word
* @word: the word to search
*
* Undefined if no set bit exists, so code should check against 0 first.
*/
static inline unsigned long __fls(unsigned long word)
{
return __ilog2_u32(word);
}
/** /**
* ffs - find first bit set * ffs - find first bit set
* @x: the word to search * @x: the word to search