blk-mq: simplify blk_mq_hw_sysfs_cpus_show()

Now that we have a cpu mask of CPUs that are mapped to
a specific hardware queue, we can just iterate that to
display the sysfs num-hw-queue/cpu_list file.

Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index b0ba264b0522..9176a6984857 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -246,16 +246,12 @@ static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx *hctx, char *page)
 
 static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
 {
-        unsigned int i, queue_num, first = 1;
+        unsigned int i, first = 1;
         ssize_t ret = 0;
 
         blk_mq_disable_hotplug();
 
-        for_each_online_cpu(i) {
-                queue_num = hctx->queue->mq_map[i];
-                if (queue_num != hctx->queue_num)
-                        continue;
-
+        for_each_cpu(i, hctx->cpumask) {
                 if (first)
                         ret += sprintf(ret + page, "%u", i);
                 else