diff options
| -rw-r--r-- | include/asm-x86/irqflags.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h index 424acb48cd6..f57f2fb6c9e 100644 --- a/include/asm-x86/irqflags.h +++ b/include/asm-x86/irqflags.h @@ -12,9 +12,15 @@ static inline unsigned long native_save_fl(void) { unsigned long flags; + /* + * Note: this needs to be "=r" not "=rm", because we have the + * stack offset from what gcc expects at the time the "pop" is + * executed, and so a memory reference with respect to the stack + * would end up using the wrong address. + */ asm volatile("# __raw_save_flags\n\t" "pushf ; pop %0" - : "=g" (flags) + : "=r" (flags) : /* no input */ : "memory"); |