linux-kernel - [PATCH 1/3] cpumask: use for_each_online_cpu() in drivers/infiniband/hw/ehca/ehca

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Date:	Sat, 22 Nov 2008 00:20:07 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Hoang-Nam Nguyen" <hnguyen@...ibm.com>
Cc:	Christoph Raisch <raisch@...ibm.com>
Subject: [PATCH 1/3] cpumask: use for_each_online_cpu() in drivers/infiniband/hw/ehca/ehca_irq.c

Impact: cleanup

In future, accessing cpu numbers beyond nr_cpu_ids (the runtime limit)
will be undefined.  We can avoid future problems by using
for_each_online_cpu() here.

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
Cc: Hoang-Nam Nguyen <hnguyen@...ibm.com>
Cc: Christoph Raisch <raisch@...ibm.com>
---
 drivers/infiniband/hw/ehca/ehca_irq.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff -r 38b459d1e9c7 drivers/infiniband/hw/ehca/ehca_irq.c
--- a/drivers/infiniband/hw/ehca/ehca_irq.c	Fri Nov 07 22:33:08 2008 +1100
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c	Fri Nov 07 22:48:13 2008 +1100
@@ -922,10 +922,9 @@ void ehca_destroy_comp_pool(void)
 
 	unregister_hotcpu_notifier(&comp_pool_callback_nb);
 
-	for (i = 0; i < NR_CPUS; i++) {
-		if (cpu_online(i))
-			destroy_comp_task(pool, i);
-	}
+	for_each_online_cpu(i)
+		destroy_comp_task(pool, i);
+
 	free_percpu(pool->cpu_comp_tasks);
 	kfree(pool);
 }


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