[PATCH 26/26] block: move the bounce flag into the feature field
From: Christoph Hellwig <hch@lst.de>
Date: 2024-06-11 05:21:11
Also in:
ceph-devel, dm-devel, linux-bcache, linux-block, linux-m68k, linux-mmc, linux-nvme, linux-raid, linux-s390, linux-scsi, linux-um, nvdimm, virtualization, xen-devel
Subsystem:
block layer, scsi subsystem, the rest · Maintainers:
Jens Axboe, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Move the bounce field into the flags field to reclaim a little bit of space. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/blk-settings.c | 1 - block/blk.h | 2 +- drivers/scsi/scsi_lib.c | 2 +- include/linux/blkdev.h | 6 ++++-- 4 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 96e07f24bd9aa1..d0e9096f93ca8a 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c@@ -479,7 +479,6 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, b->max_write_zeroes_sectors); t->max_zone_append_sectors = min(queue_limits_max_zone_append_sectors(t), queue_limits_max_zone_append_sectors(b)); - t->bounce = max(t->bounce, b->bounce); t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask, b->seg_boundary_mask);
diff --git a/block/blk.h b/block/blk.h
index 79e8d5d4fe0caf..fa32f7fad5d7e6 100644
--- a/block/blk.h
+++ b/block/blk.h@@ -394,7 +394,7 @@ struct bio *__blk_queue_bounce(struct bio *bio, struct request_queue *q); static inline bool blk_queue_may_bounce(struct request_queue *q) { return IS_ENABLED(CONFIG_BOUNCE) && - q->limits.bounce == BLK_BOUNCE_HIGH && + (q->limits.features & BLK_FEAT_BOUNCE_HIGH) && max_low_pfn >= max_pfn; }
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 54f771ec8cfb5e..e2f7bfb2b9e450 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c@@ -1986,7 +1986,7 @@ void scsi_init_limits(struct Scsi_Host *shost, struct queue_limits *lim) shost->dma_alignment, dma_get_cache_alignment() - 1); if (shost->no_highmem) - lim->bounce = BLK_BOUNCE_HIGH; + lim->features |= BLK_FEAT_BOUNCE_HIGH; dma_set_seg_boundary(dev, shost->dma_boundary); dma_set_max_seg_size(dev, shost->max_segment_size);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d7ad25def6e50b..d1d9787e76ce73 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h@@ -325,6 +325,9 @@ enum { /* skip this queue in blk_mq_(un)quiesce_tagset */ BLK_FEAT_SKIP_TAGSET_QUIESCE = (1u << 13), + + /* bounce all highmem pages */ + BLK_FEAT_BOUNCE_HIGH = (1u << 14), }; /*
@@ -332,7 +335,7 @@ enum { */ #define BLK_FEAT_INHERIT_MASK \ (BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA | BLK_FEAT_ROTATIONAL | \ - BLK_FEAT_STABLE_WRITES | BLK_FEAT_ZONED) + BLK_FEAT_STABLE_WRITES | BLK_FEAT_ZONED | BLK_FEAT_BOUNCE_HIGH) /* internal flags in queue_limits.flags */ enum {
@@ -352,7 +355,6 @@ enum blk_bounce { struct queue_limits { unsigned int features; unsigned int flags; - enum blk_bounce bounce; unsigned long seg_boundary_mask; unsigned long virt_boundary_mask;
--
2.43.0