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authorJens Axboe <axboe@fb.com>2014-05-19 09:17:48 -0600
committerJens Axboe <axboe@fb.com>2014-05-19 11:02:47 -0600
commite93ecf602beb8439f0bdcc1fa2cbc1f31fdfb8e2 (patch)
tree030ba8a90d4ebf1f9cd5d546066d12037402eda1 /block/blk-mq.h
parent2667bcbbd5ed71f29b78ba69f059dbc450e07faf (diff)
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blk-mq: move the cache friendly bitmap type of out blk-mq-tag
We will use it for the pending list in blk-mq core as well. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
-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