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| author | Hugh Dickins <hughd@google.com> | 2011-03-22 16:33:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:09 -0700 |
| commit | bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47 (patch) | |
| tree | d2c95aab9b12874d6675d529c3f8dd5cd2a35e10 /mm/shmem.c | |
| parent | 8f7a66051b7523108c5aefb08c6a637e54aedc47 (diff) | |
| download | lwn-bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47.tar.gz lwn-bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47.zip | |
shmem: let shared anonymous be nonlinear again
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>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
| -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 88593586bdb7..91ce9a1024d7 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2793,5 +2793,6 @@ 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; } |