[PATCH 6/8] block: move bd_part_count to struct gendisk
From: Christoph Hellwig <hch@lst.de>
Date: 2021-05-12 06:19:23
Also in:
linux-block, linux-s390, linux-scsi
Subsystem:
block layer, filesystems (vfs and infrastructure), the rest · Maintainers:
Jens Axboe, Alexander Viro, Christian Brauner, Linus Torvalds
The bd_part_count value only makes sense for whole devices, so move it to struct gendisk and give it a more descriptive name. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/ioctl.c | 2 +- fs/block_dev.c | 6 +++--- include/linux/blk_types.h | 3 --- include/linux/genhd.h | 1 + 4 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/block/ioctl.c b/block/ioctl.c
index 8ba1ed8defd0..24beec9ca9c9 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c@@ -89,7 +89,7 @@ static int blkdev_reread_part(struct block_device *bdev, fmode_t mode) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (bdev->bd_part_count) + if (bdev->bd_disk->open_partitions) return -EBUSY; /*
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 4bcab845ac05..8dd8e2fd1401 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c@@ -1250,7 +1250,7 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate) lockdep_assert_held(&disk->open_mutex); rescan: - if (bdev->bd_part_count) + if (disk->open_partitions) return -EBUSY; sync_blockdev(bdev); invalidate_bdev(bdev);
@@ -1345,7 +1345,7 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode) if (!(disk->flags & GENHD_FL_UP) || !bdev_nr_sectors(part)) goto out_blkdev_put; - whole->bd_part_count++; + disk->open_partitions++; set_init_blocksize(part); if (part->bd_bdi == &noop_backing_dev_info) part->bd_bdi = bdi_get(disk->queue->backing_dev_info);
@@ -1367,7 +1367,7 @@ static void blkdev_put_part(struct block_device *part, fmode_t mode) if (--part->bd_openers) return; blkdev_flush_mapping(part); - whole->bd_part_count--; + whole->bd_disk->open_partitions--; blkdev_put_whole(whole, mode); bdput(whole); }
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index a09660671fa4..fd3860d18d7e 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h@@ -39,9 +39,6 @@ struct block_device { #endif struct kobject *bd_holder_dir; u8 bd_partno; - /* number of times partitions within this device have been opened. */ - unsigned bd_part_count; - spinlock_t bd_size_lock; /* for bd_inode->i_size updates */ struct gendisk * bd_disk; struct backing_dev_info *bd_bdi;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 0747f1853f39..74fd28ddac70 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h@@ -155,6 +155,7 @@ struct gendisk { #define GD_READ_ONLY 1 struct mutex open_mutex; /* open/close mutex */ + unsigned open_partitions; /* number of open partitions */ struct kobject *slave_dir;
--
2.30.2