diff options
| author | Jeremie Courreges-Anglas <jca@cvs.openbsd.org> | 2024-06-09 21:15:30 +0000 |
|---|---|---|
| committer | Jeremie Courreges-Anglas <jca@cvs.openbsd.org> | 2024-06-09 21:15:30 +0000 |
| commit | 977775b0acd19093de50847e8fa120058920b482 (patch) | |
| tree | 66e016bafdba6cbc7b249007fd2ed238d874197a /sys/arch/i386 | |
| parent | a2ef373f1bb8aae51b1708be19723283553a0a6d (diff) | |
Add a compiler barrier where missing in CPU_BUSY_CYCLE() implems
Having differences between architectures is asking for problems. And
adding a barrier here just makes sense in most cases. This is also what
cpu_relax() provides in Linux land.
ok kettenis@ claudio@
Diffstat (limited to 'sys/arch/i386')
| -rw-r--r-- | sys/arch/i386/include/cpu.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/arch/i386/include/cpu.h b/sys/arch/i386/include/cpu.h index 565f6159c74..d9b5cb50bc9 100644 --- a/sys/arch/i386/include/cpu.h +++ b/sys/arch/i386/include/cpu.h @@ -1,4 +1,4 @@ -/* $OpenBSD: cpu.h,v 1.190 2024/06/07 16:53:35 kettenis Exp $ */ +/* $OpenBSD: cpu.h,v 1.191 2024/06/09 21:15:29 jca Exp $ */ /* $NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $ */ /*- @@ -262,7 +262,7 @@ void cpu_unidle(struct cpu_info *); #define cpu_kick(ci) #define cpu_unidle(ci) -#define CPU_BUSY_CYCLE() do {} while (0) +#define CPU_BUSY_CYCLE() __asm volatile ("" ::: "memory") #endif |