[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>
diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c
index 72bf92a..d18198e 100644
--- a/arch/x86_64/ia32/ptrace32.c
+++ b/arch/x86_64/ia32/ptrace32.c
@@ -375,8 +375,10 @@
ret = -EIO;
if (!access_ok(VERIFY_READ, u, sizeof(*u)))
break;
- /* no checking to be bug-to-bug compatible with i386 */
- __copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u));
+ /* no checking to be bug-to-bug compatible with i386. */
+ /* but silence warning */
+ if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u)))
+ ;
set_stopped_child_used_math(child);
child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
ret = 0;