1 files changed, 4 insertions, 0 deletions

diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c
index 28ab80649764..583c238e17fb 100644
--- a/arch/i386/kernel/alternative.c
+++ b/arch/i386/kernel/alternative.c
@@ -344,6 +344,7 @@ void alternatives_smp_switch(int smp)
 
 void __init alternative_instructions(void)
 {
+        unsigned long flags;
         if (no_replacement) {
                 printk(KERN_INFO "(SMP-)alternatives turned off\n");
                 free_init_pages("SMP alternatives",
@@ -351,6 +352,8 @@ void __init alternative_instructions(void)
                                 (unsigned long)__smp_alt_end);
                 return;
         }
+
+        local_irq_save(flags);
         apply_alternatives(__alt_instructions, __alt_instructions_end);
 
         /* switch to patch-once-at-boottime-only mode and free the
@@ -386,4 +389,5 @@ void __init alternative_instructions(void)
                 alternatives_smp_switch(0);
         }
 #endif
+        local_irq_restore(flags);
 }