From b36781034c42f9932bc6305e9a06490d61d9b8ff Mon Sep 17 00:00:00 2001 From: Zhong Jinghua Date: Sat, 28 Jan 2023 11:04:19 +0800 Subject: [PATCH] blk-mq: cleanup unused methods: blk_mq_hw_sysfs_store We found that the blk_mq_hw_sysfs_store interface has no place to use. The object default_hw_ctx_attrs using blk_mq_hw_sysfs_ops only uses the show method and does not use the store method. Since this patch: 4a46f05ebf99 ("blk-mq: move hctx and ctx counters from sysfs to debugfs") moved the store method to debugfs, the store method is not used anymore. So let me do some tiny work to clean up unused code. Signed-off-by: Zhong Jinghua Reviewed-by: Ming Lei Link: https://lore.kernel.org/r/20230128030419.2780298-1-zhongjinghua@huawei.com Signed-off-by: Jens Axboe --- block/blk-mq-sysfs.c | 24 ------------------------ 1 file changed, 24 deletions(-) diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index 4515288fbe35..2dfd7853a804 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -46,7 +46,6 @@ static void blk_mq_hw_sysfs_release(struct kobject *kobj) struct blk_mq_hw_ctx_sysfs_entry { struct attribute attr; ssize_t (*show)(struct blk_mq_hw_ctx *, char *); - ssize_t (*store)(struct blk_mq_hw_ctx *, const char *, size_t); }; static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj, @@ -70,28 +69,6 @@ static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj, return res; } -static ssize_t blk_mq_hw_sysfs_store(struct kobject *kobj, - struct attribute *attr, const char *page, - size_t length) -{ - struct blk_mq_hw_ctx_sysfs_entry *entry; - struct blk_mq_hw_ctx *hctx; - struct request_queue *q; - ssize_t res; - - entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr); - hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj); - q = hctx->queue; - - if (!entry->store) - return -EIO; - - mutex_lock(&q->sysfs_lock); - res = entry->store(hctx, page, length); - mutex_unlock(&q->sysfs_lock); - return res; -} - static ssize_t blk_mq_hw_sysfs_nr_tags_show(struct blk_mq_hw_ctx *hctx, char *page) { @@ -150,7 +127,6 @@ ATTRIBUTE_GROUPS(default_hw_ctx); static const struct sysfs_ops blk_mq_hw_sysfs_ops = { .show = blk_mq_hw_sysfs_show, - .store = blk_mq_hw_sysfs_store, }; static struct kobj_type blk_mq_ktype = { -- 2.11.0