x86: don't save ebx in putuser_32.S.
Clobber it in the inline asm macros, and let the compiler do this for us.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/lib/putuser_32.S b/arch/x86/lib/putuser_32.S
index f58fba1..5b2a926 100644
--- a/arch/x86/lib/putuser_32.S
+++ b/arch/x86/lib/putuser_32.S
@@ -26,14 +26,8 @@
*/
#define ENTER CFI_STARTPROC ; \
- pushl %ebx ; \
- CFI_ADJUST_CFA_OFFSET 4 ; \
- CFI_REL_OFFSET ebx, 0 ; \
GET_THREAD_INFO(%ebx)
-#define EXIT popl %ebx ; \
- CFI_ADJUST_CFA_OFFSET -4 ; \
- CFI_RESTORE ebx ; \
- ret ; \
+#define EXIT ret ; \
CFI_ENDPROC
.text
@@ -81,10 +75,7 @@
ENDPROC(__put_user_8)
bad_put_user:
- CFI_STARTPROC simple
- CFI_DEF_CFA esp, 2*4
- CFI_OFFSET eip, -1*4
- CFI_OFFSET ebx, -2*4
+ CFI_STARTPROC
movl $-14,%eax
EXIT
END(bad_put_user)