From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Thu, 2 Apr 2009 07:17:04 +0000 (+0800)
Subject: tracing: update file->f_pos when splice(2) it
X-Git-Tag: v2.6.30-rc2~75^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7625a555f55d7ae49236cde551786c88f5a5ce1;p=pandora-kernel.git

tracing: update file->f_pos when splice(2) it

Impact: Cleanup

These two lines:

	if (unlikely(*ppos))
		return -ESPIPE;

in tracing_buffers_splice_read() are not needed, VFS layer
has disabled seek(2).

We remove these two lines, and then we can update file->f_pos.

And tracing_buffers_read() updates file->f_pos, this fix
make tracing_buffers_splice_read() updates file->f_pos too.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
LKML-Reference: <49D46670.4010503@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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