Clobber stack pointer given that assembly does CALL.
Signed-off-by: Alexey Dobriyan <adobri...@gmail.com>
---
arch/x86/include/asm/uaccess.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -176,7 +176,8 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL),
0ULL, 0UL))
})
#define __put_user_x(size, x, ptr, __ret_pu) \
- asm volatile("call __put_user_" #size : "=a" (__ret_pu) \
+ asm volatile("call __put_user_" #size \
+ : "=a" (__ret_pu), ASM_CALL_CONSTRAINT \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
