mm: remove unused GUP flags

GUP_FLAGS_IGNORE_VMA_PERMISSIONS and GUP_FLAGS_IGNORE_SIGKILL were
flags added solely to prevent __get_user_pages() from doing some of
what it usually does, in the munlock case: we can now remove them.

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.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/nommu.c b/mm/nommu.c
index 3b90086e85a2..386443e9d2c6 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -176,7 +176,6 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
         int i;
         int write = !!(flags & GUP_FLAGS_WRITE);
         int force = !!(flags & GUP_FLAGS_FORCE);
-        int ignore = !!(flags & GUP_FLAGS_IGNORE_VMA_PERMISSIONS);
 
         /* calculate required read or write permissions.
          * - if 'force' is set, we only require the "MAY" flags.
@@ -190,8 +189,8 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                         goto finish_or_fault;
 
                 /* protect what we can, including chardevs */
-                if (vma->vm_flags & (VM_IO | VM_PFNMAP) ||
-                    (!ignore && !(vm_flags & vma->vm_flags)))
+                if ((vma->vm_flags & (VM_IO | VM_PFNMAP)) ||
+                    !(vm_flags & vma->vm_flags))
                         goto finish_or_fault;
 
                 if (pages) {
@@ -210,7 +209,6 @@ finish_or_fault:
         return i ? : -EFAULT;
 }
 
-
 /*
  * get a list of pages in an address range belonging to the specified process
  * and indicate the VMA that covers each page