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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2015-05-12 20:32:29 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-05-18 16:22:56 -0400 |
| commit | 5b95e1af8d17d85a17728f6de7dbff538e6e3c49 (patch) | |
| tree | d502e4a59194374a6a94d1e7ec812509b884c51e /crypto/algapi.c | |
| parent | b749b1b67351bd9be1aa640cadf66d32dfcccfd1 (diff) | |
workqueue: wq_pool_mutex protects the attrs-installation
Current wq_pool_mutex doesn't proctect the attrs-installation, it results
that ->unbound_attrs, ->numa_pwq_tbl[] and ->dfl_pwq can only be accessed
under wq->mutex and causes some inconveniences. Example, wq_update_unbound_numa()
has to acquire wq->mutex before fetching the wq->unbound_attrs->no_numa
and the old_pwq.
attrs-installation is a short operation, so this change will no cause any
latency for other operations which also acquire the wq_pool_mutex.
The only unprotected attrs-installation code is in apply_workqueue_attrs(),
so this patch touches code less than comments.
It is also a preparation patch for next several patches which read
wq->unbound_attrs, wq->numa_pwq_tbl[] and wq->dfl_pwq with
only wq_pool_mutex held.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'crypto/algapi.c')
0 files changed, 0 insertions, 0 deletions