asm-generic: uaccess: fix up local access_ok() usage
Mike Frysinger [Sun, 14 Jun 2009 06:00:03 +0000 (02:00 -0400)]
There's no reason that I can see to use the short __access_ok() form
directly when the access_ok() is clearer in intent and for most people,
expands to the same C code (i.e. always specify the first field -- access
type).  Not all no-mmu systems lack memory protection, so the read/write
could feasibly be checked.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

include/asm-generic/uaccess.h

index 5dd511b..b218b85 100644 (file)
@@ -163,7 +163,7 @@ static inline __must_check long __copy_to_user(void __user *to,
 #define put_user(x, ptr)                                       \
 ({                                                             \
        might_sleep();                                          \
-       __access_ok(ptr, sizeof (*ptr)) ?                       \
+       access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)) ?            \
                __put_user(x, ptr) :                            \
                -EFAULT;                                        \
 })
@@ -219,7 +219,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
 #define get_user(x, ptr)                                       \
 ({                                                             \
        might_sleep();                                          \
-       __access_ok(ptr, sizeof (*ptr)) ?                       \
+       access_ok(VERIFY_READ, ptr, sizeof(*ptr)) ?             \
                __get_user(x, ptr) :                            \
                -EFAULT;                                        \
 })
@@ -244,7 +244,7 @@ static inline long copy_from_user(void *to,
                const void __user * from, unsigned long n)
 {
        might_sleep();
-       if (__access_ok(from, n))
+       if (access_ok(VERIFY_READ, from, n))
                return __copy_from_user(to, from, n);
        else
                return n;
@@ -254,7 +254,7 @@ static inline long copy_to_user(void __user *to,
                const void *from, unsigned long n)
 {
        might_sleep();
-       if (__access_ok(to, n))
+       if (access_ok(VERIFY_WRITE, to, n))
                return __copy_to_user(to, from, n);
        else
                return n;
@@ -278,7 +278,7 @@ __strncpy_from_user(char *dst, const char __user *src, long count)
 static inline long
 strncpy_from_user(char *dst, const char __user *src, long count)
 {
-       if (!__access_ok(src, 1))
+       if (!access_ok(VERIFY_READ, src, 1))
                return -EFAULT;
        return __strncpy_from_user(dst, src, count);
 }
@@ -318,7 +318,7 @@ static inline __must_check unsigned long
 clear_user(void __user *to, unsigned long n)
 {
        might_sleep();
-       if (!__access_ok(to, n))
+       if (!access_ok(VERIFY_WRITE, to, n))
                return n;
 
        return __clear_user(to, n);