diff options
| -rw-r--r-- | arch/x86/kernel/alternative.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 7038b95d363f..4db35544de73 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -620,7 +620,12 @@ static int __kprobes stop_machine_text_poke(void *data) flush_icache_range((unsigned long)p->addr, (unsigned long)p->addr + p->len); } - + /* + * Intel Archiecture Software Developer's Manual section 7.1.3 specifies + * that a core serializing instruction such as "cpuid" should be + * executed on _each_ core before the new instruction is made visible. + */ + sync_core(); return 0; } |