setup vma->vm_page_prot by vm_get_page_prot()

This patch uses vm_get_page_prot() to setup vma->vm_page_prot.

Though inside vm_get_page_prot() the protection flags is AND with
(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED), it does not hurt correct code.

Signed-off-by: Coly Li <coyli@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 1d4d69790e59..55227845abbe 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -192,11 +192,9 @@ success:
          * held in write mode.
          */
         vma->vm_flags = newflags;
-        vma->vm_page_prot = protection_map[newflags &
-                (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
+        vma->vm_page_prot = vm_get_page_prot(newflags);
         if (vma_wants_writenotify(vma)) {
-                vma->vm_page_prot = protection_map[newflags &
-                        (VM_READ|VM_WRITE|VM_EXEC)];
+                vma->vm_page_prot = vm_get_page_prot(newflags);
                 dirty_accountable = 1;
         }