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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-30 23:27:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-01 00:39:22 -0700 |
| commit | cdc39363d33506b0e067d41fc91f89d186bdf7f7 (patch) | |
| tree | abbc303abbccd730b56c35bd021f8ff57e4f5929 /include | |
| parent | ef6edc9746dc2bfdacf44eefd5f881179971c478 (diff) | |
| download | kernel_samsung_crespo-cdc39363d33506b0e067d41fc91f89d186bdf7f7.zip kernel_samsung_crespo-cdc39363d33506b0e067d41fc91f89d186bdf7f7.tar.gz kernel_samsung_crespo-cdc39363d33506b0e067d41fc91f89d186bdf7f7.tar.bz2 | |
[PATCH] Directed yield: direct yield of spinlocks for powerpc
Powerpc already has a directed yield for CONFIG_PREEMPT="n". To make it
work with CONFIG_PREEMPT="y" as well the _raw_{spin,read,write}_relax
primitives need to be defined to call __spin_yield() for spinlocks and
__rw_yield() for rw-locks.
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-powerpc/spinlock.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-powerpc/spinlock.h b/include/asm-powerpc/spinlock.h index eaccac8..cc4cfce 100644 --- a/include/asm-powerpc/spinlock.h +++ b/include/asm-powerpc/spinlock.h @@ -285,9 +285,9 @@ static __inline__ void __raw_write_unlock(raw_rwlock_t *rw) rw->lock = 0; } -#define _raw_spin_relax(lock) cpu_relax() -#define _raw_read_relax(lock) cpu_relax() -#define _raw_write_relax(lock) cpu_relax() +#define _raw_spin_relax(lock) __spin_yield(lock) +#define _raw_read_relax(lock) __rw_yield(lock) +#define _raw_write_relax(lock) __rw_yield(lock) #endif /* __KERNEL__ */ #endif /* __ASM_SPINLOCK_H */ |