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-rw-r--r--block/blk-mq.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 97cfab9c092f..5e5a378962b7 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -52,4 +52,13 @@ void blk_mq_disable_hotplug(void);
extern unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set);
extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);
+/*
+ * Basic implementation of sparser bitmap, allowing the user to spread
+ * the bits over more cachelines.
+ */
+struct blk_align_bitmap {
+ unsigned long word;
+ unsigned long depth;
+} ____cacheline_aligned_in_smp;
+
#endif