[PATCH v2 01/10] asm-generic: uaccess s/might_sleep/might_fault/
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2013-05-16 11:21:15
Also in:
kvm, linux-arch, linux-arm-kernel, linux-mm, lkml
Subsystem:
generic include/asm header files, the rest · Maintainers:
Arnd Bergmann, Linus Torvalds
The only reason uaccess routines might sleep is if they fault. Make this explicit. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- include/asm-generic/uaccess.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index c184aa8..dc1269c 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;
--
MST