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debug cgroup: use task_css_set instead of rcu_dereference
authorWang Long <wanglong19@meituan.com>
Sun, 19 Nov 2017 21:08:37 +0000 (16:08 -0500)
committerTejun Heo <tj@kernel.org>
Mon, 27 Nov 2017 19:37:33 +0000 (11:37 -0800)
commitddf7005f32212f28669032651e09bd8d2245c35d
tree5fb56a56fcdfed62892a8e662d53f893a18c11ca
parent1599a185f0e6113be185b9fb809c621c73865829
debug cgroup: use task_css_set instead of rcu_dereference

This macro `task_css_set` verifies that the caller is
inside proper critical section if the kernel set CONFIG_PROVE_RCU=y.

Signed-off-by: Wang Long <wanglong19@meituan.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
kernel/cgroup/debug.c