constify rw_verify_area()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/aio.c

@@ -39,6 +39,8 @@
 #include <asm/kmap_types.h>
 #include <asm/uaccess.h>
 
+#include "internal.h"
+
 #define AIO_RING_MAGIC			0xa10a10a1
 #define AIO_RING_COMPAT_FEATURES	1
 #define AIO_RING_INCOMPAT_FEATURES	0

fs/internal.h

@@ -131,6 +131,7 @@ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
  * read_write.c
  */
 extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
+extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 
 /*
  * splice.c

fs/read_write.c

@@ -316,7 +316,7 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
  * them to something that fits in "int" so that others
  * won't have to do range checks all the time.
  */
-int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count)
+int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t count)
 {
 	struct inode *inode;
 	loff_t pos;

include/linux/fs.h

@@ -1898,7 +1898,6 @@ extern int current_umask(void);
 extern struct kobject *fs_kobj;
 
 #define MAX_RW_COUNT (INT_MAX & PAGE_CACHE_MASK)
-extern int rw_verify_area(int, struct file *, loff_t *, size_t);
 
 #define FLOCK_VERIFY_READ  1
 #define FLOCK_VERIFY_WRITE 2