[PATCH] blk-mq-debugfs: Add decode for BLK_MQ_F_TAG_HCTX_SHARED

[John Garry <john.garry@xxxxxxxxxx>]

Showing the hctx flags for when BLK_MQ_F_TAG_HCTX_SHARED is set gives
something like:

root@debian:/home/john# more /sys/kernel/debug/block/sda/hctx0/flags
alloc_policy=FIFO SHOULD_MERGE|TAG_QUEUE_SHARED|3

Add the decoding for that flag.

Fixes: 32bc15afed04b ("blk-mq: Facilitate a shared sbitmap per tagset")
Signed-off-by: John Garry <john.garry@xxxxxxxxxx>

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 3094542e12ae..ea4ab98e6b25 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -245,6 +245,7 @@ static const char *const hctx_flag_name[] = {
 	HCTX_FLAG_NAME(BLOCKING),
 	HCTX_FLAG_NAME(NO_SCHED),
 	HCTX_FLAG_NAME(STACKING),
+	HCTX_FLAG_NAME(TAG_HCTX_SHARED),
 };
 #undef HCTX_FLAG_NAME
 
-- 
2.26.2