mm/memory.c: fix typo in comment

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/memory.c

@@ -2148,7 +2148,7 @@ static int insert_pfn(struct vm_area_struct *vma, unsigned long addr,
  * @addr: target user address of this page
  * @pfn: source kernel pfn
  *
- * Similar to vm_inert_page, this allows drivers to insert individual pages
+ * Similar to vm_insert_page, this allows drivers to insert individual pages
  * they've allocated into a user vma. Same comments apply.
  *
  * This function should only be called from a vm_ops->fault handler, and