From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Wed, 12 Mar 2014 08:05:33 +0000 (+0000)
Subject: btrfs: Add trace for btrfs_workqueue alloc/destroy
X-Git-Tag: v3.15-rc1~96^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3a468915a384c0015263edd9b7263775599a323;p=pandora-kernel.git

btrfs: Add trace for btrfs_workqueue alloc/destroy

Since most of the btrfs_workqueue is printed as pointer address,
for easier analysis, add trace for btrfs_workqueue alloc/destroy.
So it is possible to determine the workqueue that a given work belongs
to(by comparing the wq pointer address with alloc trace event).

Signed-off-by: Qu Wenruo <quenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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