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>

diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index c184aa8ec8cd5c81f189ff9350e52e6e27e5b2a6..dc1269c74a52077b389b30d72523a1530a336eee 100644 (file)
--- 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;