[PATCH] x86_64: Readd missing tests in entry.S

Cleans up the system exit call slightly and synchronizes with my tree again.

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 1086b5f..2881749 100644 (file)
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -220,13 +220,18 @@ sysret_careful:
        jmp sysret_check
 
        /* Handle a signal */ 
-       /* edx: work flags (arg3) */
 sysret_signal:
        sti
+       testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+       jz    1f
+
+       /* Really a signal */
+       /* edx: work flags (arg3) */
        leaq do_notify_resume(%rip),%rax
        leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1
        xorl %esi,%esi # oldset -> arg2
        call ptregscall_common
+1:     movl $_TIF_NEED_RESCHED,%edi
        jmp sysret_check
        
        /* Do syscall tracing */
@@ -484,6 +489,8 @@ retint_careful:
        jmp retint_check
        
 retint_signal:
+       testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+       jz    retint_swapgs
        sti
        SAVE_REST
        movq $-1,ORIG_RAX(%rsp)                         
@@ -492,8 +499,8 @@ retint_signal:
        call do_notify_resume
        RESTORE_REST
        cli
+       movl $_TIF_NEED_RESCHED,%edi
        GET_THREAD_INFO(%rcx)
-       movl $_TIF_WORK_MASK,%edi
        jmp retint_check
 
 #ifdef CONFIG_PREEMPT