Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH 1/8] rcu: add a warn to rcu_preempt_note_context_switch() | Date | Wed, 7 Aug 2013 18:24:57 +0800 |
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It is expected that _nesting == INT_MIN if _nesting < 0. Add a warning to it if something unexpected happen.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> --- kernel/rcutree_plugin.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 63098a5..8fd947e 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -243,6 +243,7 @@ static void rcu_preempt_note_context_switch(int cpu) : rnp->gpnum + 1); raw_spin_unlock_irqrestore(&rnp->lock, flags); } else if (t->rcu_read_lock_nesting < 0 && + !WARN_ON_ONCE(t->rcu_read_lock_nesting != INT_MIN) && t->rcu_read_unlock_special) { /* -- 1.7.4.4
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