Commits
Tahsin Erdogan committed 86525f9f447
percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages
[ Upstream commit 320661b08dd6f1746d5c7ab4eb435ec64b97cd45 ]
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: b539b87fed37 ("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+
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>