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| author | Mike Galbraith <efault@gmx.de> | 2007-07-09 18:52:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-07-09 18:52:00 +0200 |
| commit | ff80a77f20f811c0cc5b251d0f657cbc6f788385 (patch) | |
| tree | f3f45cd248803c31ae9a616969db5460085f39ac | |
| parent | sched: add CFS documentation (diff) | |
| download | linux-ff80a77f20f811c0cc5b251d0f657cbc6f788385.tar.xz linux-ff80a77f20f811c0cc5b251d0f657cbc6f788385.zip | |
sched: simplify sched_find_first_bit()
simplify sched_rt.c's sched_find_first_bit() function: there are
only 100 RT priority levels left.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/asm-generic/bitops/sched.h | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/include/asm-generic/bitops/sched.h b/include/asm-generic/bitops/sched.h index 815bb0148060..604fab7031a6 100644 --- a/include/asm-generic/bitops/sched.h +++ b/include/asm-generic/bitops/sched.h @@ -6,28 +6,23 @@ /* * Every architecture must define this function. It's the fastest - * way of searching a 140-bit bitmap where the first 100 bits are - * unlikely to be set. It's guaranteed that at least one of the 140 - * bits is cleared. + * way of searching a 100-bit bitmap. It's guaranteed that at least + * one of the 100 bits is cleared. */ static inline int sched_find_first_bit(const unsigned long *b) { #if BITS_PER_LONG == 64 - if (unlikely(b[0])) + if (b[0]) return __ffs(b[0]); - if (likely(b[1])) - return __ffs(b[1]) + 64; - return __ffs(b[2]) + 128; + return __ffs(b[1]) + 64; #elif BITS_PER_LONG == 32 - if (unlikely(b[0])) + if (b[0]) return __ffs(b[0]); - if (unlikely(b[1])) + if (b[1]) return __ffs(b[1]) + 32; - if (unlikely(b[2])) + if (b[2]) return __ffs(b[2]) + 64; - if (b[3]) - return __ffs(b[3]) + 96; - return __ffs(b[4]) + 128; + return __ffs(b[3]) + 96; #else #error BITS_PER_LONG not defined #endif |