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block: export block_unplug tracepoint
authorNeilBrown <neilb@suse.de>
Fri, 14 Dec 2012 19:49:27 +0000 (20:49 +0100)
committerJens Axboe <axboe@kernel.dk>
Fri, 14 Dec 2012 19:49:27 +0000 (20:49 +0100)
commitcbae8d45d61f3a8c155caf267d01e5e0f0b2f4b7
treebf5920d41e2f948ce92b9dbe8bf3919290000f4etree
parent0cfbcafcae8b7364b5fa96c2b26ccde7a3a296a9commit | diff
block: export block_unplug tracepoint

This allows stacked devices (like md/raid5) to provide blktrace
tracing, including unplug events.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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