diff options
| author | Hugh Dickins <hughd@google.com> | 2011-03-22 16:33:43 -0700 |
|---|---|---|
| committer | AK <andi@firstfloor.org> | 2011-03-31 11:58:44 -0700 |
| commit | b845a0bebf3e8728277ed92e1cb66e8901cf4b50 (patch) | |
| tree | 2d1954d6a42c83565d63ebdf37b7b66cedead8df | |
| parent | b9aa753f949640e886e776a793af042f4262bde7 (diff) | |
shmem: let shared anonymous be nonlinear again
commit bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47 upstream.
Up to 2.6.22, you could use remap_file_pages(2) on a tmpfs file or a
shared mapping of /dev/zero or a shared anonymous mapping. In 2.6.23 we
disabled it by default, but set VM_CAN_NONLINEAR to enable it on safe
mappings. We made sure to set it in shmem_mmap() for tmpfs files, but
missed it in shmem_zero_setup() for the others. Fix that at last.
Reported-by: Kenny Simpson <theonetruekenny@yahoo.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| -rw-r--r-- | mm/shmem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index f65f84062db..676eed33780 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2756,5 +2756,6 @@ int shmem_zero_setup(struct vm_area_struct *vma) fput(vma->vm_file); vma->vm_file = file; vma->vm_ops = &shmem_vm_ops; + vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } |