block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n
Exclude zoned block device members from struct request_queue for CONFIG_BLK_DEV_ZONED == n. Avoid breaking the build by only building the code that uses these struct request_queue members if CONFIG_BLK_DEV_ZONED != n. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Cc: Matias Bjorling <mb@lightnvm.io> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -177,6 +177,10 @@ config BLK_DEBUG_FS
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Unless you are building a kernel for a tiny system, you should
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say Y here.
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config BLK_DEBUG_FS_ZONED
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bool
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default BLK_DEBUG_FS && BLK_DEV_ZONED
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config BLK_SED_OPAL
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bool "Logic for interfacing with Opal enabled SEDs"
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---help---
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@ -34,4 +34,5 @@ obj-$(CONFIG_BLK_MQ_RDMA) += blk-mq-rdma.o
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obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o
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obj-$(CONFIG_BLK_WBT) += blk-wbt.o
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obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o
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obj-$(CONFIG_BLK_DEBUG_FS_ZONED)+= blk-mq-debugfs-zoned.o
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obj-$(CONFIG_BLK_SED_OPAL) += sed-opal.o
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24
block/blk-mq-debugfs-zoned.c
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24
block/blk-mq-debugfs-zoned.c
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@ -0,0 +1,24 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2017 Western Digital Corporation or its affiliates.
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*
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* This file is released under the GPL.
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*/
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#include <linux/blkdev.h>
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#include "blk-mq-debugfs.h"
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int queue_zone_wlock_show(void *data, struct seq_file *m)
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{
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struct request_queue *q = data;
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unsigned int i;
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if (!q->seq_zones_wlock)
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return 0;
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for (i = 0; i < q->nr_zones; i++)
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if (test_bit(i, q->seq_zones_wlock))
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seq_printf(m, "%u\n", i);
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return 0;
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}
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@ -206,21 +206,6 @@ static ssize_t queue_write_hint_store(void *data, const char __user *buf,
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return count;
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}
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static int queue_zone_wlock_show(void *data, struct seq_file *m)
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{
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struct request_queue *q = data;
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unsigned int i;
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if (!q->seq_zones_wlock)
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return 0;
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for (i = 0; i < q->nr_zones; i++)
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if (test_bit(i, q->seq_zones_wlock))
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seq_printf(m, "%u\n", i);
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return 0;
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}
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static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
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{ "poll_stat", 0400, queue_poll_stat_show },
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{ "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
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@ -80,4 +80,13 @@ static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hc
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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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@ -592,6 +592,7 @@ struct request_queue {
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struct queue_limits limits;
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#ifdef CONFIG_BLK_DEV_ZONED
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/*
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* Zoned block device information for request dispatch control.
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* nr_zones is the total number of zones of the device. This is always
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@ -612,6 +613,7 @@ struct request_queue {
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unsigned int nr_zones;
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unsigned long *seq_zones_bitmap;
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unsigned long *seq_zones_wlock;
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#endif /* CONFIG_BLK_DEV_ZONED */
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/*
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* sg stuff
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@ -800,6 +802,7 @@ static inline unsigned int blk_queue_zone_sectors(struct request_queue *q)
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return blk_queue_is_zoned(q) ? q->limits.chunk_sectors : 0;
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}
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#ifdef CONFIG_BLK_DEV_ZONED
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static inline unsigned int blk_queue_zone_no(struct request_queue *q,
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sector_t sector)
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{
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@ -815,6 +818,7 @@ static inline bool blk_queue_zone_is_seq(struct request_queue *q,
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return false;
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return test_bit(blk_queue_zone_no(q, sector), q->seq_zones_bitmap);
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}
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#endif /* CONFIG_BLK_DEV_ZONED */
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static inline bool rq_is_sync(struct request *rq)
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{
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@ -1065,6 +1069,7 @@ static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
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return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT;
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}
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#ifdef CONFIG_BLK_DEV_ZONED
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static inline unsigned int blk_rq_zone_no(struct request *rq)
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{
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return blk_queue_zone_no(rq->q, blk_rq_pos(rq));
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@ -1074,6 +1079,7 @@ static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
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{
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return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq));
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}
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#endif /* CONFIG_BLK_DEV_ZONED */
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/*
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* Some commands like WRITE SAME have a payload or data transfer size which
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