[PATCH] Missing __user in pointer referenced within copy_from_user

Pointers to user data should be marked with a __user hint.  This one is
missing.
Signed-off-by: NGlauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/proc/base.c

@@ -581,7 +581,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
 
 #ifndef mem_write
 /* This is a security hazard */
-static ssize_t mem_write(struct file * file, const char * buf,
+static ssize_t mem_write(struct file * file, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
 	int copied;