diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2008-01-01 23:37:17 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2008-01-01 23:37:17 +0000 |
| commit | 7378d8481a7f0ed0a48c47c12fa53df87df6a12b (patch) | |
| tree | d6b8980a9486343f5dac1b4c07280dcf27eaf0d9 /sys/arch/sparc64 | |
| parent | 883994669f8a59021bf6a2fb7589922767a54c9a (diff) | |
Implement an MP-safe rw_cas() based upon the casx instruction; ok kettenis@
Diffstat (limited to 'sys/arch/sparc64')
| -rw-r--r-- | sys/arch/sparc64/include/lock.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/arch/sparc64/include/lock.h b/sys/arch/sparc64/include/lock.h index c880043998b..7c8d35490a4 100644 --- a/sys/arch/sparc64/include/lock.h +++ b/sys/arch/sparc64/include/lock.h @@ -1,10 +1,11 @@ -/* $OpenBSD: lock.h,v 1.2 2007/11/05 20:19:22 miod Exp $ */ +/* $OpenBSD: lock.h,v 1.3 2008/01/01 23:37:16 miod Exp $ */ /* public domain */ #ifndef _SPARC64_LOCK_H_ #define _SPARC64_LOCK_H_ +#include <machine/atomic.h> #include <machine/ctlreg.h> typedef volatile u_int8_t __cpu_simple_lock_t; @@ -50,4 +51,6 @@ __cpu_simple_unlock(__cpu_simple_lock_t *l) *l = __SIMPLELOCK_UNLOCKED; } +#define rw_cas_sparc64 (sparc64_casx(p, o, n) != o) + #endif /* _SPARC64_LOCK_H_ */ |