[PATCH] asm-i386/atomic.h: local_irq_save should be used instead of local_irq_disable
atomic_add_return() if CONFIG_M386 can accidentally enable local interrupts.
Signed-off-by: Lepton Wu <ytht.net@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/atomic.h b/include/asm-i386/atomic.h
index 22d80ec..4ddce52 100644
--- a/include/asm-i386/atomic.h
+++ b/include/asm-i386/atomic.h
@@ -183,6 +183,7 @@
{
int __i;
#ifdef CONFIG_M386
+ unsigned long flags;
if(unlikely(boot_cpu_data.x86==3))
goto no_xadd;
#endif
@@ -196,10 +197,10 @@
#ifdef CONFIG_M386
no_xadd: /* Legacy 386 processor */
- local_irq_disable();
+ local_irq_save(flags);
__i = atomic_read(v);
atomic_set(v, i + __i);
- local_irq_enable();
+ local_irq_restore(flags);
return i + __i;
#endif
}