[PATCH] x86_64: Fix a small missing schedule race

Could lead to a lost reschedule event when the process already rescheduled on
exception exit, and needs it again while still being in the kernel.  Unlikely
case though.

Also remove one redundant cli in another entry.S path.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 3e888c2..887c5f0 100644 (file)
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -284,6 +284,7 @@ int_careful:
        pushq %rdi
        call schedule
        popq %rdi
+       cli
        jmp int_with_check
 
        /* handle signals and tracing -- both require a full stack frame */
@@ -453,7 +454,6 @@ retint_check:
        andl %edi,%edx
        jnz  retint_careful
 retint_swapgs:         
-       cli
        swapgs 
 retint_restore_args:                           
        cli