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(parent: 94e2a51) | patch
percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages
authorTahsin Erdogan <tahsin@google.com>
Sat, 25 Feb 2017 21:00:19 +0000 (13:00 -0800)
committerTejun Heo <tj@kernel.org>
Mon, 6 Mar 2017 20:55:39 +0000 (15:55 -0500)
commitdfce0c2c7ae178e76fe5e22bea6289c4fe107c29
treebb7249336a8e2d2ab0d2d22689a5737dd78bf3e0tree | snapshot
parent94e2a518d0ac4a168bccd1446b1a1407458c45bdcommit | diff
percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages

Update to pcpu_nr_empty_pop_pages in pcpu_alloc() is currently done
without holding pcpu_lock. This can lead to bad updates to the variable.
Add missing lock calls.

Fixes: e8b5e62e8898 ("percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated")
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v3.18+
mm/percpu.c diff | blob | history
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