From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 11 Dec 2009 03:54:27 +0000 (-0500)
Subject: ring-buffer: Use sync sched protection on ring buffer resizing
X-Git-Tag: v2.6.33-rc1~52^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=184210154b9aa570099183f6c062ac4eb11190b7;p=pandora-kernel.git

ring-buffer: Use sync sched protection on ring buffer resizing

There was a comment in the ring buffer code that says the calling
layers should prevent tracing or reading of the ring buffer while
resizing. I have discovered that the tracers do not honor this
arrangement.

This patch moves the disabling and synchronizing the ring buffer to
a higher layer during resizing. This guarantees that no writes
are occurring while the resize takes place.

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