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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-30 13:01:35 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-30 13:01:35 -0400 |
| commit | 70c8a00a09076ca2683ef24356fad2e55f93a427 (patch) | |
| tree | a54329b865a15e29364be31c6567f37807c4c3bb /kernel | |
| parent | b9a532277938798b53178d5a66af6e2915cb27cf (diff) | |
| parent | 7c4f1c694bf84eac538bee3e411aed10ae617d46 (diff) | |
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU fixes from Ingo Molnar:
"Two RCU fixes:
- work around bug with recent GCC versions.
- fix false positive lockdep splat"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rcu: Suppress lockdep false positive for rcp->exp_funnel_mutex
rcu: Change _wait_rcu_gp() to work around GCC bug 67055
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/tree.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 9f75f25cc5d9..775d36cc0050 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3868,6 +3868,7 @@ static void rcu_init_new_rnp(struct rcu_node *rnp_leaf) static void __init rcu_boot_init_percpu_data(int cpu, struct rcu_state *rsp) { + static struct lock_class_key rcu_exp_sched_rdp_class; unsigned long flags; struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu); struct rcu_node *rnp = rcu_get_root(rsp); @@ -3883,6 +3884,10 @@ rcu_boot_init_percpu_data(int cpu, struct rcu_state *rsp) mutex_init(&rdp->exp_funnel_mutex); rcu_boot_init_nocb_percpu_data(rdp); raw_spin_unlock_irqrestore(&rnp->lock, flags); + if (rsp == &rcu_sched_state) + lockdep_set_class_and_name(&rdp->exp_funnel_mutex, + &rcu_exp_sched_rdp_class, + "rcu_data_exp_sched"); } /* |