percpu ida: Switch to cpumask_t, add some commentspercpu-ida

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/idr.h b/include/linux/idr.h
index f0db12bfab7d..cdf39bebb814 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -267,7 +267,7 @@ struct percpu_ida {
 	 * will just keep looking - but the bitmap _must_ be set whenever a
 	 * percpu freelist does have tags.
 	 */
-	unsigned long			*cpus_have_tags;
+	cpumask_t			cpus_have_tags;
 
 	struct {
 		spinlock_t		lock;