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authorPaul E. McKenney <paul.mckenney@linaro.org>2012-05-09 08:45:12 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-07-02 12:34:21 -0700
commit285fe29481d865ae381ad3924c80894e6968c2d8 (patch)
treee01e809f4c840770698f857e8176ebb083ff9ad8 /kernel/rcutree.c
parentcba6d0d64ee53772b285d0c0c288deefbeaf7775 (diff)
rcu: Fix detection of abruptly-ending stall
The code that attempts to identify stalls that end just as we detect them is broken by both flavors of initialization failure. This commit therefore properly initializes and computes the count of the number of reasons why the RCU grace period is stalled. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 4b97bba7396..dc8c5284fe0 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -733,7 +733,7 @@ static void print_other_cpu_stall(struct rcu_state *rsp)
int cpu;
long delta;
unsigned long flags;
- int ndetected;
+ int ndetected = 0;
struct rcu_node *rnp = rcu_get_root(rsp);
/* Only let one CPU complain about others per time interval. */
@@ -774,7 +774,7 @@ static void print_other_cpu_stall(struct rcu_state *rsp)
*/
rnp = rcu_get_root(rsp);
raw_spin_lock_irqsave(&rnp->lock, flags);
- ndetected = rcu_print_task_stall(rnp);
+ ndetected += rcu_print_task_stall(rnp);
raw_spin_unlock_irqrestore(&rnp->lock, flags);
print_cpu_stall_info_end();