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authorMichal Simek <monstr@monstr.eu>2010-03-22 20:49:45 +0300
committerMichal Simek <monstr@monstr.eu>2010-04-01 10:38:23 +0400
commit89ae9753aef160c2f7bcecec21a7c4a6bc4c9b9b (patch)
tree5eeebd436301aa2598ba7b8db41afe52fa58cae6
parent94804a9b3d0e62096a52fb62afcea32b899380c5 (diff)
downloadlinux-89ae9753aef160c2f7bcecec21a7c4a6bc4c9b9b.tar.xz
microblaze: uaccess: Sync strlen, strnlen, copy_to/from_user
Last sync. Signed-off-by: Michal Simek <monstr@monstr.eu>
-rw-r--r--arch/microblaze/include/asm/uaccess.h88
1 files changed, 32 insertions, 56 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index b33ab659781e..446bec29b142 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -294,40 +294,6 @@ extern long __user_bad(void);
#define put_user(x, ptr) __put_user((x), (ptr))
-static inline long strnlen_user(const char __user *src, long count)
-{
- return strlen(src) + 1;
-}
-
-#define __do_strncpy_from_user(dst, src, count, res) \
- do { \
- char *tmp; \
- strncpy(dst, src, count); \
- for (tmp = dst; *tmp && count > 0; tmp++, count--) \
- ; \
- res = (tmp - dst); \
- } while (0)
-
-static inline long __strncpy_from_user(char *dst,
- const char __user *src, long count)
-{
- long res;
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-static inline long strncpy_from_user(char *dst,
- const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-extern long strncpy_from_user(char *dst, const char *src, long count);
-extern long strnlen_user(const char *src, long count);
-
#else /* CONFIG_MMU */
#define put_user(x, ptr) \
@@ -335,26 +301,9 @@ extern long strnlen_user(const char *src, long count);
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
})
-
-extern int __strncpy_user(char *to, const char __user *from, int len);
-
-#define __strncpy_from_user __strncpy_user
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- if (!access_ok(VERIFY_READ, src, 1))
- return -EFAULT;
- return __strncpy_from_user(dst, src, count);
-}
-
-extern int __strnlen_user(const char __user *sstr, int len);
-
-#define strnlen_user(str, len) \
- (access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)
-
#endif /* CONFIG_MMU */
+/* copy_to_from_user */
#define __copy_from_user(to, from, n) \
__copy_tofrom_user((__force void __user *)(to), \
(void __user *)(from), (n))
@@ -367,8 +316,7 @@ static inline long copy_from_user(void *to,
might_sleep();
if (access_ok(VERIFY_READ, from, n))
return __copy_from_user(to, from, n);
- else
- return n;
+ return n;
}
#define __copy_to_user(to, from, n) \
@@ -382,8 +330,36 @@ static inline long copy_to_user(void __user *to,
might_sleep();
if (access_ok(VERIFY_WRITE, to, n))
return __copy_to_user(to, from, n);
- else
- return n;
+ return n;
+}
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+extern int __strncpy_user(char *to, const char __user *from, int len);
+
+#define __strncpy_from_user __strncpy_user
+
+static inline long
+strncpy_from_user(char *dst, const char __user *src, long count)
+{
+ if (!access_ok(VERIFY_READ, src, 1))
+ return -EFAULT;
+ return __strncpy_from_user(dst, src, count);
+}
+
+/*
+ * Return the size of a string (including the ending 0)
+ *
+ * Return 0 on exception, a value greater than N if too long
+ */
+extern int __strnlen_user(const char __user *sstr, int len);
+
+static inline long strnlen_user(const char __user *src, long n)
+{
+ if (!access_ok(VERIFY_READ, src, 1))
+ return 0;
+ return __strnlen_user(src, n);
}
#endif /* __ASSEMBLY__ */