mirror of
https://github.com/torvalds/linux.git
synced 2024-12-16 16:12:52 +00:00
ff80a77f20
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>
32 lines
721 B
C
32 lines
721 B
C
#ifndef _ASM_GENERIC_BITOPS_SCHED_H_
|
|
#define _ASM_GENERIC_BITOPS_SCHED_H_
|
|
|
|
#include <linux/compiler.h> /* unlikely() */
|
|
#include <asm/types.h>
|
|
|
|
/*
|
|
* Every architecture must define this function. It's the fastest
|
|
* 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 (b[0])
|
|
return __ffs(b[0]);
|
|
return __ffs(b[1]) + 64;
|
|
#elif BITS_PER_LONG == 32
|
|
if (b[0])
|
|
return __ffs(b[0]);
|
|
if (b[1])
|
|
return __ffs(b[1]) + 32;
|
|
if (b[2])
|
|
return __ffs(b[2]) + 64;
|
|
return __ffs(b[3]) + 96;
|
|
#else
|
|
#error BITS_PER_LONG not defined
|
|
#endif
|
|
}
|
|
|
|
#endif /* _ASM_GENERIC_BITOPS_SCHED_H_ */
|