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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-30 23:27:44 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:22 -0700
commitcdc39363d33506b0e067d41fc91f89d186bdf7f7 (patch)
treeabbc303abbccd730b56c35bd021f8ff57e4f5929
parentef6edc9746dc2bfdacf44eefd5f881179971c478 (diff)
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[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>
-rw-r--r--include/asm-powerpc/spinlock.h6
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 */
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