diff options
Diffstat (limited to 'arch/i386/kernel/alternative.c')
| -rw-r--r-- | arch/i386/kernel/alternative.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c index 206ea2ca63cc..c3750c2c4113 100644 --- a/arch/i386/kernel/alternative.c +++ b/arch/i386/kernel/alternative.c @@ -8,6 +8,8 @@ #include <asm/alternative.h> #include <asm/sections.h> #include <asm/pgtable.h> +#include <asm/mce.h> +#include <asm/nmi.h> #ifdef CONFIG_HOTPLUG_CPU static int smp_alt_once; @@ -373,6 +375,14 @@ void __init alternative_instructions(void) { unsigned long flags; + /* The patching is not fully atomic, so try to avoid local interruptions + that might execute the to be patched code. + Other CPUs are not running. */ + stop_nmi(); +#ifdef CONFIG_MCE + stop_mce(); +#endif + local_irq_save(flags); apply_alternatives(__alt_instructions, __alt_instructions_end); @@ -405,6 +415,11 @@ void __init alternative_instructions(void) #endif apply_paravirt(__parainstructions, __parainstructions_end); local_irq_restore(flags); + + restart_nmi(); +#ifdef CONFIG_MCE + restart_mce(); +#endif } /* |