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authorTejun Heo <tj@kernel.org>2020-03-12 16:44:35 -0400
committerTejun Heo <tj@kernel.org>2020-03-12 16:44:35 -0400
commite7b20d97967c2995700041f0348ea33047e5c942 (patch)
tree00f5a4ddabf212cf94519f9241c4c35cfcd8c5ca /fs
parenta09833f7cdf45b9e85b975646287526fe352d08f (diff)
cgroup: Restructure release_agent_path handling
cgrp->root->release_agent_path is protected by both cgroup_mutex and release_agent_path_lock and readers can hold either one. The dual-locking scheme was introduced while breaking a locking dependency issue around cgroup_mutex but doesn't make sense anymore given that the only remaining reader which uses cgroup_mutex is cgroup1_releaes_agent(). This patch updates cgroup1_release_agent() to use release_agent_path_lock so that release_agent_path is always protected only by release_agent_path_lock. While at it, convert strlen() based empty string checks to direct tests on the first character as suggested by Linus. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions