[PATCH] mm: remove implied vm_ops check

If !vma->vm-ops we already BUG above, so retesting it is useless.  The
compiler cannot optimize this because BUG is a macro and is not thus marked
noreturn; that should possibly be fixed.
Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

mm/memory.c

@@ -1955,7 +1955,7 @@ static int do_file_page(struct mm_struct * mm, struct vm_area_struct * vma,
 	 * Fall back to the linear mapping if the fs does not support
 	 * ->populate:
 	 */
-	if (!vma->vm_ops || !vma->vm_ops->populate || 
+	if (!vma->vm_ops->populate ||
 			(write_access && !(vma->vm_flags & VM_SHARED))) {
 		pte_clear(mm, address, pte);
 		return do_no_page(mm, vma, address, write_access, pte, pmd);