diff options
| author | Hugh Dickins <hughd@google.com> | 2011-03-22 16:33:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-27 11:30:27 -0700 |
| commit | c2234bf9dbc4db7b2f378c9ad0d59fd75f5793f0 (patch) | |
| tree | 243facd19407b35f1eccfe8e69ab74136fa38528 | |
| parent | 5b390b74fb12f9b4b740eb8afd7dfe8d4889c3bc (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>
| -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 356dd99566e..3e0005bc52a 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2691,5 +2691,6 @@ 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; } |