NOMMU: Don't need to clear vm_mm when deleting a VMA
Don't clear vm_mm in a deleted VMA as it's unnecessary and might conceivably break the filesystem or driver VMA close routine. Reported-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NAl Viro <viro@zeniv.linux.org.uk> cc: stable@vger.kernel.org Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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