From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-m32r-ja@ml.linux-m32r.org, kvm@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
David Howells <dhowells@redhat.com>,
linux-mm@kvack.org, Paul Mackerras <paulus@samba.org>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-arch@vger.kernel.org, linux-am33-list@redhat.com,
Hirokazu Takata <takata@linux-m32r.org>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
microblaze-uclinux@itee.uq.edu.au,
Chris Metcalf <cmetcalf@tilera.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
Michal Simek <monstr@monstr.eu>,
linux-m32r@ml.linux-m32r.org,
Koichi Yasutake <yasutake.koichi@jp.panasonic.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 04/10] m32r: uaccess s/might_sleep/might_fault/
Date: Thu, 16 May 2013 14:11:04 +0300 [thread overview]
Message-ID: <8b99c8a5fb9dc4ee9a39f96ecb3b9c02c97a8ba2.1368702323.git.mst@redhat.com> (raw)
In-Reply-To: <cover.1368702323.git.mst@redhat.com>
The only reason uaccess routines might sleep
is if they fault. Make this explicit.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
arch/m32r/include/asm/uaccess.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
index 1c7047b..84fe7ba 100644
--- a/arch/m32r/include/asm/uaccess.h
+++ b/arch/m32r/include/asm/uaccess.h
@@ -216,7 +216,7 @@ extern int fixup_exception(struct pt_regs *regs);
({ \
long __gu_err = 0; \
unsigned long __gu_val; \
- might_sleep(); \
+ might_fault(); \
__get_user_size(__gu_val,(ptr),(size),__gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
@@ -227,7 +227,7 @@ extern int fixup_exception(struct pt_regs *regs);
long __gu_err = -EFAULT; \
unsigned long __gu_val = 0; \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_READ,__gu_addr,size)) \
__get_user_size(__gu_val,__gu_addr,(size),__gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
@@ -295,7 +295,7 @@ do { \
#define __put_user_nocheck(x,ptr,size) \
({ \
long __pu_err; \
- might_sleep(); \
+ might_fault(); \
__put_user_size((x),(ptr),(size),__pu_err); \
__pu_err; \
})
@@ -305,7 +305,7 @@ do { \
({ \
long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- might_sleep(); \
+ might_fault(); \
if (access_ok(VERIFY_WRITE,__pu_addr,size)) \
__put_user_size((x),__pu_addr,(size),__pu_err); \
__pu_err; \
@@ -597,7 +597,7 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
*/
#define copy_to_user(to,from,n) \
({ \
- might_sleep(); \
+ might_fault(); \
__generic_copy_to_user((to),(from),(n)); \
})
@@ -638,7 +638,7 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
*/
#define copy_from_user(to,from,n) \
({ \
- might_sleep(); \
+ might_fault(); \
__generic_copy_from_user((to),(from),(n)); \
})
--
MST
next prev parent reply other threads:[~2013-05-16 11:12 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-16 11:07 [PATCH v2 00/10] uaccess: better might_sleep/might_fault behavior Michael S. Tsirkin
2013-05-16 11:10 ` [PATCH v2 01/10] asm-generic: uaccess s/might_sleep/might_fault/ Michael S. Tsirkin
2013-05-16 11:10 ` [PATCH v2 02/10] arm64: " Michael S. Tsirkin
2013-05-16 13:29 ` Catalin Marinas
2013-05-16 11:10 ` [PATCH v2 03/10] frv: " Michael S. Tsirkin
2013-05-16 11:11 ` Michael S. Tsirkin [this message]
2013-05-16 11:11 ` [PATCH v2 05/10] microblaze: " Michael S. Tsirkin
2013-05-16 11:12 ` [PATCH v2 06/10] mn10300: " Michael S. Tsirkin
2013-05-16 11:15 ` [PATCH v2 07/10] powerpc: " Michael S. Tsirkin
2013-05-22 13:59 ` Arnd Bergmann
2013-05-22 14:30 ` Michael S. Tsirkin
2013-05-24 13:00 ` Michael S. Tsirkin
2013-05-24 13:11 ` Michael S. Tsirkin
2013-05-24 13:30 ` Arnd Bergmann
2013-05-16 11:15 ` [PATCH v2 08/10] tile: " Michael S. Tsirkin
2013-05-16 13:33 ` Chris Metcalf
2013-05-16 11:15 ` [PATCH v2 09/10] x86: " Michael S. Tsirkin
2013-05-16 11:16 ` [PATCH v2 10/10] kernel: might_fault does not imply might_sleep Michael S. Tsirkin
2013-05-16 18:40 ` Peter Zijlstra
2013-05-19 9:35 ` Michael S. Tsirkin
2013-05-19 12:34 ` Steven Rostedt
2013-05-19 13:34 ` Michael S. Tsirkin
2013-05-19 16:06 ` Steven Rostedt
2013-05-19 16:40 ` Michael S. Tsirkin
2013-05-19 20:23 ` Steven Rostedt
2013-05-19 20:35 ` Michael S. Tsirkin
2013-05-21 11:18 ` Peter Zijlstra
2013-05-21 11:21 ` Peter Zijlstra
2013-05-21 11:57 ` Peter Zijlstra
2013-05-22 9:47 ` Michael S. Tsirkin
2013-05-22 10:16 ` Peter Zijlstra
2013-05-22 20:38 ` Michael S. Tsirkin
2013-05-22 20:36 ` Michael S. Tsirkin
2013-05-22 9:25 ` [PATCH v2 00/10] uaccess: better might_sleep/might_fault behavior Arnd Bergmann
2013-05-22 9:58 ` Michael S. Tsirkin
2013-05-22 10:19 ` Peter Zijlstra
2013-05-22 11:07 ` Michael S. Tsirkin
2013-05-22 11:27 ` Peter Zijlstra
2013-05-22 13:41 ` Russell King - ARM Linux
2013-05-22 14:04 ` Arnd Bergmann
2013-05-22 14:44 ` Michael S. Tsirkin
2013-05-24 14:18 ` [PATCH v3 07/11] powerpc: uaccess s/might_sleep/might_fault/ Michael S. Tsirkin
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