[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: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/mm/memory.c b/mm/memory.c
index a596c11..b25f5e5 100644 (file)
--- a/mm/memory.c
+++ b/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);