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new helper: iov_iter_get_pages_alloc()
authorAl Viro <viro@zeniv.linux.org.uk>
Fri, 21 Mar 2014 08:58:33 +0000 (04:58 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Tue, 6 May 2014 21:32:53 +0000 (17:32 -0400)
same as iov_iter_get_pages(), except that pages array is allocated
(kmalloc if possible, vmalloc if that fails) and left for caller to
free.  Lustre and NFS ->direct_IO() switched to it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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