Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1408 | serge | 1 | #ifndef _ASM_GENERIC_BITOPS_SCHED_H_ |
2 | #define _ASM_GENERIC_BITOPS_SCHED_H_ |
||
3 | |||
4 | #include |
||
5 | #include |
||
6 | |||
7 | /* |
||
8 | * Every architecture must define this function. It's the fastest |
||
9 | * way of searching a 100-bit bitmap. It's guaranteed that at least |
||
10 | * one of the 100 bits is cleared. |
||
11 | */ |
||
12 | static inline int sched_find_first_bit(const unsigned long *b) |
||
13 | { |
||
14 | #if BITS_PER_LONG == 64 |
||
15 | if (b[0]) |
||
16 | return __ffs(b[0]); |
||
17 | return __ffs(b[1]) + 64; |
||
18 | #elif BITS_PER_LONG == 32 |
||
19 | if (b[0]) |
||
20 | return __ffs(b[0]); |
||
21 | if (b[1]) |
||
22 | return __ffs(b[1]) + 32; |
||
23 | if (b[2]) |
||
24 | return __ffs(b[2]) + 64; |
||
25 | return __ffs(b[3]) + 96; |
||
26 | #else |
||
27 | #error BITS_PER_LONG not defined |
||
28 | #endif |
||
29 | } |
||
30 | |||
31 | #endif /* _ASM_GENERIC_BITOPS_SCHED_H_ */ |