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| author | Michael S. Tsirkin <mst@redhat.com> | 2013-05-26 17:30:36 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-05-28 09:41:05 +0200 |
| commit | e0acd0bd0594161be44c054bb6b984972f444beb (patch) | |
| tree | a1f786a535ff25a14341cf8b110c1fe0b20c6e37 /include/asm-generic | |
| parent | e4aa937ec75df0eea0bee03bffa3303ad36c986b (diff) | |
| download | lwn-e0acd0bd0594161be44c054bb6b984972f444beb.tar.gz lwn-e0acd0bd0594161be44c054bb6b984972f444beb.zip | |
asm-generic: 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@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1369577426-26721-1-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/uaccess.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index c184aa8ec8cd..dc1269c74a52 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -163,7 +163,7 @@ static inline __must_check long __copy_to_user(void __user *to, #define put_user(x, ptr) \ ({ \ - might_sleep(); \ + might_fault(); \ access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)) ? \ __put_user(x, ptr) : \ -EFAULT; \ @@ -225,7 +225,7 @@ extern int __put_user_bad(void) __attribute__((noreturn)); #define get_user(x, ptr) \ ({ \ - might_sleep(); \ + might_fault(); \ access_ok(VERIFY_READ, ptr, sizeof(*ptr)) ? \ __get_user(x, ptr) : \ -EFAULT; \ @@ -255,7 +255,7 @@ extern int __get_user_bad(void) __attribute__((noreturn)); static inline long copy_from_user(void *to, const void __user * from, unsigned long n) { - might_sleep(); + might_fault(); if (access_ok(VERIFY_READ, from, n)) return __copy_from_user(to, from, n); else @@ -265,7 +265,7 @@ static inline long copy_from_user(void *to, static inline long copy_to_user(void __user *to, const void *from, unsigned long n) { - might_sleep(); + might_fault(); if (access_ok(VERIFY_WRITE, to, n)) return __copy_to_user(to, from, n); else @@ -336,7 +336,7 @@ __clear_user(void __user *to, unsigned long n) static inline __must_check unsigned long clear_user(void __user *to, unsigned long n) { - might_sleep(); + might_fault(); if (!access_ok(VERIFY_WRITE, to, n)) return n; |