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| author | Todd Poynor <toddpoynor@google.com> | 2013-03-13 17:35:08 -0700 |
|---|---|---|
| committer | Todd Poynor <toddpoynor@google.com> | 2013-03-13 17:35:08 -0700 |
| commit | 1249d25539343d1a7fe361c8d40be7a5df5b0216 (patch) | |
| tree | 770c9a33604bb00c62f44d780aefab27e4eb9379 /kernel/cgroup.c | |
| parent | 4aad13d07babf68c1d0d37ff1e5f797573c4fd2a (diff) | |
| parent | 0b203ab4aacdb6e6dfb8c277aa290f0a02428e6f (diff) | |
| download | kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.zip kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.tar.gz kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.tar.bz2 | |
Merge branch 'android-3.0' into android-omap-3.0
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 3948f0a..460aa1b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -366,10 +366,18 @@ static void free_css_set_work(struct work_struct *work) struct cgroup *cgrp = link->cgrp; list_del(&link->cg_link_list); list_del(&link->cgrp_link_list); + /* + * We may not be holding cgroup_mutex, and if cgrp->count is + * dropped to 0 the cgroup can be destroyed at any time, hence + * rcu_read_lock is used to keep it alive. + */ + rcu_read_lock(); if (atomic_dec_and_test(&cgrp->count)) { check_for_release(cgrp); cgroup_wakeup_rmdir_waiter(cgrp); } + rcu_read_unlock(); + kfree(link); } write_unlock(&css_set_lock); |