From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 17 Jun 2009 04:39:43 +0000 (-0400)
Subject: ring-buffer: add locks around rb_per_cpu_empty
X-Git-Tag: v2.6.31-rc1~95^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d47882078f05c2cb46b85f1e12a58ed9315b9d63;p=pandora-kernel.git

ring-buffer: add locks around rb_per_cpu_empty

The checking of whether the buffer is empty or not needs to be serialized
among the readers. Add the reader spin lock around it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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