mm/memory.c: trivial clean up in insert_page()

Make the success case use the same cleanup path as the failure case.

Link: http://lkml.kernel.org/r/20190523134024.GC24093@localhost.localdomainSigned-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memory.c

@@ -1475,8 +1475,6 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
 	set_pte_at(mm, addr, pte, mk_pte(page, prot));
 
 	retval = 0;
-	pte_unmap_unlock(pte, ptl);
-	return retval;
 out_unlock:
 	pte_unmap_unlock(pte, ptl);
 out: