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authorMichal Simek <monstr@monstr.eu>2010-03-22 17:56:32 +0300
committerMichal Simek <monstr@monstr.eu>2010-04-01 10:38:21 +0400
commit4270690bd4b1420a8d634ea31953a1c4def2a44a (patch)
treec0418abd19b4e0f9f854c8e05b916d1e0b9c49c8 /arch/microblaze/include/asm/uaccess.h
parentcc5a428b7ae9c2d6233b5bf6b3e6fbb24ddd1ed5 (diff)
downloadlinux-4270690bd4b1420a8d634ea31953a1c4def2a44a.tar.xz
microblaze: uaccess: fix copy_from_user macro
copy_from_user macro also use copy_tofrom_user function Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/include/asm/uaccess.h')
-rw-r--r--arch/microblaze/include/asm/uaccess.h23
1 files changed, 14 insertions, 9 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 125e4cf4105c..b56d8ae9b17e 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -375,12 +375,24 @@ extern long __user_bad(void);
extern unsigned long __copy_tofrom_user(void __user *to,
const void __user *from, unsigned long size);
-#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n))
+#define __copy_from_user(to, from, n) \
+ __copy_tofrom_user((__force void __user *)(to), \
+ (void __user *)(from), (n))
#define __copy_from_user_inatomic(to, from, n) \
copy_from_user((to), (from), (n))
+static inline long copy_from_user(void *to,
+ const void __user *from, unsigned long n)
+{
+ might_sleep();
+ if (access_ok(VERIFY_READ, from, n))
+ return __copy_from_user(to, from, n);
+ else
+ return n;
+}
+
#define __copy_to_user(to, from, n) \
- __copy_tofrom_user((void __user *)(to), \
+ __copy_tofrom_user((void __user *)(to), \
(__force const void __user *)(from), (n))
#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n))
@@ -394,12 +406,6 @@ static inline long copy_to_user(void __user *to,
return n;
}
-#define copy_from_user(to, from, n) \
- (access_ok(VERIFY_READ, (from), (n)) ? \
- __copy_tofrom_user((__force void __user *)(to), \
- (void __user *)(from), (n)) \
- : -EFAULT)
-
extern int __strncpy_user(char *to, const char __user *from, int len);
extern int __strnlen_user(const char __user *sstr, int len);
@@ -411,7 +417,6 @@ extern int __strnlen_user(const char __user *sstr, int len);
#endif /* CONFIG_MMU */
-
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */