[PATCH] Add __must_check to copy_*_user

Following i386.

And also fix the two occurrences that caused warnings in arch/x86_64/*

Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/asm-x86_64/i387.h b/include/asm-x86_64/i387.h
index 60c0f4853fdb..0217b74cc9fc 100644
--- a/include/asm-x86_64/i387.h
+++ b/include/asm-x86_64/i387.h
@@ -137,8 +137,8 @@ static inline int save_i387_checking(struct i387_fxsave_struct __user *fx)
 #else
                      : [fx] "cdaSDb" (fx), "0" (0));
 #endif
-        if (unlikely(err))
-                __clear_user(fx, sizeof(struct i387_fxsave_struct));
+        if (unlikely(err) && __clear_user(fx, sizeof(struct i387_fxsave_struct)))
+                err = -EFAULT;
         /* No need to clear here because the caller clears USED_MATH */
         return err;
 }