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When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. When all of these checks are cleaned up, lots of the functions used in the blk-mq-debugfs code can now return void, as no need to check the return value of them either. Overall, this ends up cleaning up the code and making it smaller, always a nice win. Cc: Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef INT_BLK_MQ_DEBUGFS_H
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#define INT_BLK_MQ_DEBUGFS_H
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#ifdef CONFIG_BLK_DEBUG_FS
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#include <linux/seq_file.h>
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struct blk_mq_debugfs_attr {
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const char *name;
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umode_t mode;
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int (*show)(void *, struct seq_file *);
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ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
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/* Set either .show or .seq_ops. */
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const struct seq_operations *seq_ops;
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};
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int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
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int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
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void blk_mq_debugfs_register(struct request_queue *q);
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void blk_mq_debugfs_unregister(struct request_queue *q);
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void blk_mq_debugfs_register_hctx(struct request_queue *q,
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struct blk_mq_hw_ctx *hctx);
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void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
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void blk_mq_debugfs_register_hctxs(struct request_queue *q);
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void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
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void blk_mq_debugfs_register_sched(struct request_queue *q);
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void blk_mq_debugfs_unregister_sched(struct request_queue *q);
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void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
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struct blk_mq_hw_ctx *hctx);
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void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
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void blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
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void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
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void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q);
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#else
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static inline void blk_mq_debugfs_register(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_unregister(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_register_hctx(struct request_queue *q,
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struct blk_mq_hw_ctx *hctx)
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{
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}
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static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
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{
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}
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static inline void blk_mq_debugfs_register_hctxs(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_register_sched(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
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{
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}
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static inline void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
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struct blk_mq_hw_ctx *hctx)
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{
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}
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static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
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{
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}
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static inline void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
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{
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}
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static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
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{
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}
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static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
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{
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}
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#endif
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#ifdef CONFIG_BLK_DEBUG_FS_ZONED
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int queue_zone_wlock_show(void *data, struct seq_file *m);
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#else
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static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
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{
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return 0;
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}
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#endif
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#endif
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