[PATCH RFC] x86: uaccess s/might_sleep/might_fault/

["Michael S. Tsirkin" <mst@redhat.com>]

The only reason uaccess routines might sleep
is if they fault. Make this explicit for
__copy_from_user_nocache, and consistent with
copy_from_user and friends.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

I've updated all other arches as well - still
build-testing. Any objections to the x86 patch?

 arch/x86/include/asm/uaccess_64.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 142810c..4f7923d 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -235,7 +235,7 @@ extern long __copy_user_nocache(void *dst, const void __user *src,
 static inline int
 __copy_from_user_nocache(void *dst, const void __user *src, unsigned size)
 {
-	might_sleep();
+	might_fault();
 	return __copy_user_nocache(dst, src, size, 1);
 }
 
-- 
MST