From: Miklos Szeredi <miklos@szeredi.hu>
Date: Thu, 7 May 2009 13:37:36 +0000 (+0200)
Subject: splice: implement default splice_read method
X-Git-Tag: v2.6.31-rc1~389^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6818173bd658439b83896a2a7586f64ab51bf29c;p=pandora-kernel.git

splice: implement default splice_read method

If f_op->splice_read() is not implemented, fall back to a plain read.
Use vfs_readv() to read into previously allocated pages.

This will allow splice and functions using splice, such as the loop
device, to work on all filesystems.  This includes "direct_io" files
in fuse which bypass the page cache.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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