From dc6d36c9710d1fed42d1bbe7d8e4f742abd844c6 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jaxboe@fusionio.com>
Date: Tue, 12 Apr 2011 10:28:28 +0200
Subject: [PATCH] block: readd plug trace event

This was removed with the queue plug state. But we can easily readd
by checking if this is the first request going to this queue. It's
good information to have when tracing to see how effective the
plugging is.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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Reading git-format-patch failed