tree e6f0985223c87408773c3b81428935d3ce99931b
parent 0776ce03b1348d39ba3035ea3ee3d268a42912ce
author Michel Lespinasse <walken@google.com> 1364513183 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1364517951 -0700

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

This reverts commit 186930500985 ("mm: introduce VM_POPULATE flag to
better deal with racy userspace programs").

VM_POPULATE only has any effect when userspace plays racy games with
vmas by trying to unmap and remap memory regions that mmap or mlock are
operating on.

Also, the only effect of VM_POPULATE when userspace plays such games is
that it avoids populating new memory regions that get remapped into the
address range that was being operated on by the original mmap or mlock
calls.

Let's remove VM_POPULATE as there isn't any strong argument to mandate a
new vm_flag.

Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>