From: Hugh Dickins <hugh@veritas.com>
Date: Mon, 4 Jun 2007 08:00:39 +0000 (+0200)
Subject: shmem: convert to using splice instead of sendfile()
X-Git-Tag: v2.6.23-rc1~1157^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae976416464b741913a13eea62eb6953ee065733;p=pandora-kernel.git

shmem: convert to using splice instead of sendfile()

Remove shmem_file_sendfile and resurrect shmem_readpage, as used by tmpfs
to support loop and sendfile in 2.4 and 2.5.  Now tmpfs can support splice,
loop and sendfile in the simplest way, using generic_file_splice_read and
generic_file_splice_write (with the aid of shmem_prepare_write).

We could make some efficiency tweaks later, if there's a real need;
but this is stable and works well as is.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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