proc: remove mm_for_maps()

mm_for_maps() is a simple wrapper for mm_access(), and the name is
misleading, so just remove it and use mm_access() directly.

Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/base.c

@@ -199,11 +199,6 @@ static int proc_root_link(struct dentry *dentry, struct path *path)
 	return result;
 }
 
-struct mm_struct *mm_for_maps(struct task_struct *task)
-{
-	return mm_access(task, PTRACE_MODE_READ);
-}
-
 static int proc_pid_cmdline(struct task_struct *task, char * buffer)
 {
 	int res = 0;
@@ -243,7 +238,7 @@ out:
 
 static int proc_pid_auxv(struct task_struct *task, char *buffer)
 {
-	struct mm_struct *mm = mm_for_maps(task);
+	struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ);
 	int res = PTR_ERR(mm);
 	if (mm && !IS_ERR(mm)) {
 		unsigned int nwords = 0;