linux-kernel - [tip:sched/mm] x86: uaccess s/might_sleep/might

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Date:	Tue, 28 May 2013 06:24:34 -0700
From:	"tip-bot for Michael S. Tsirkin" <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	a.p.zijlstra@...llo.nl, torvalds@...ux-foundation.org,
	mst@...hat.com, peterz@...radead.org, akpm@...ux-foundation.org,
	tglx@...utronix.de
Subject: [tip:sched/mm] x86: uaccess s/might_sleep/might_fault/

Commit-ID:  016be2e55d98aee0b97b94b200d6e0e110c8392a
Gitweb:     http://git.kernel.org/tip/016be2e55d98aee0b97b94b200d6e0e110c8392a
Author:     Michael S. Tsirkin <mst@...hat.com>
AuthorDate: Sun, 26 May 2013 17:31:55 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
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@...hat.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1369577426-26721-9-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 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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