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>

1 files changed, 5 insertions, 5 deletions

diff --git a/include/asm-x86/uaccess_32.h b/include/asm-x86/uaccess_32.h
index 8e7595c1f34e..0ecfe47ad60d 100644
--- a/include/asm-x86/uaccess_32.h
+++ b/include/asm-x86/uaccess_32.h
@@ -188,23 +188,23 @@ extern void __put_user_8(void);
 
 #define __put_user_1(x, ptr)                                    \
         asm volatile("call __put_user_1" : "=a" (__ret_pu)      \
-                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
 
 #define __put_user_2(x, ptr)                                    \
         asm volatile("call __put_user_2" : "=a" (__ret_pu)      \
-                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
 
 #define __put_user_4(x, ptr)                                    \
         asm volatile("call __put_user_4" : "=a" (__ret_pu)      \
-                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+                     : "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
 
 #define __put_user_8(x, ptr)                                    \
         asm volatile("call __put_user_8" : "=a" (__ret_pu)      \
-                     : "A" ((typeof(*(ptr)))(x)), "c" (ptr))
+                     : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
 
 #define __put_user_X(x, ptr)                                    \
         asm volatile("call __put_user_X" : "=a" (__ret_pu)      \
-                     : "c" (ptr))
+                     : "c" (ptr): "ebx")
 
 /**
  * put_user: - Write a simple value into user space.