[tip:sched/mm] x86: uaccess s/might_sleep/might_fault/

[tip-bot for Michael S. Tsirkin]

Commit-ID:  016be2e55d98aee0b97b94b200d6e0e110c8392a
Gitweb:     http://git.kernel.org/tip/016be2e55d98aee0b97b94b200d6e0e110c8392a
Author:     Michael S. Tsirkin <mst@xxxxxxxxxx>
AuthorDate: Sun, 26 May 2013 17:31:55 +0300
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 28 May 2013 09:41:10 +0200

x86: uaccess s/might_sleep/might_fault/

The only reason uaccess routines might sleep
is if they fault. Make this explicit.

Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1369577426-26721-9-git-send-email-mst@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 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);
 }
 
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