block: move the NEED_PART_SCAN flag to struct gendisk

We can only scan for partitions on the whole disk, so move the flag
from struct block_device to struct gendisk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/genhd.c b/block/genhd.c
index 9d060e7..7b56203 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -731,7 +731,7 @@ static void register_disk(struct device *parent, struct gendisk *disk,
        if (!bdev)
                goto exit;
 
-       set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+       set_bit(GD_NEED_PART_SCAN, &disk->state);
        err = blkdev_get(bdev, FMODE_READ, NULL);
        if (err < 0)
                goto exit;
@@ -2112,7 +2112,7 @@ bool bdev_check_media_change(struct block_device *bdev)
        if (__invalidate_device(bdev, true))
                pr_warn("VFS: busy inodes on changed media %s\n",
                        bdev->bd_disk->disk_name);
-       set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+       set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
        return true;
 }
 EXPORT_SYMBOL(bdev_check_media_change);

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 15eed21..2dca0aa 100644 (file)
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -315,7 +315,7 @@ static void nbd_size_update(struct nbd_device *nbd)
                        bd_set_nr_sectors(bdev, nr_sectors);
                        set_blocksize(bdev, config->blksize);
                } else
-                       set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+                       set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
                bdput(bdev);
        }
        kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
@@ -1322,7 +1322,7 @@ static int nbd_start_device_ioctl(struct nbd_device *nbd, struct block_device *b
                return ret;
 
        if (max_part)
-               set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+               set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
        mutex_unlock(&nbd->config_lock);
        ret = wait_event_interruptible(config->recv_wq,
                                         atomic_read(&config->recv_threads) == 0);
@@ -1500,9 +1500,9 @@ static int nbd_open(struct block_device *bdev, fmode_t mode)
                refcount_set(&nbd->config_refs, 1);
                refcount_inc(&nbd->refs);
                mutex_unlock(&nbd->config_lock);
-               set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+               set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
        } else if (nbd_disconnected(nbd->config)) {
-               set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+               set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
        }
 out:
        mutex_unlock(&nbd_index_mutex);

diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 661e2aa..e2b6c82 100644 (file)
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -230,7 +230,7 @@ static int ide_gd_open(struct block_device *bdev, fmode_t mode)
                                bdev->bd_disk->disk_name);
                drive->disk_ops->get_capacity(drive);
                set_capacity(disk, ide_gd_capacity(drive));
-               set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+               set_bit(GD_NEED_PART_SCAN, &disk->state);
        } else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
                ret = -EBUSY;
                goto out_put_idkp;

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 0b34955..1a9325f 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -910,7 +910,6 @@ struct block_device *bdget(dev_t dev)
                bdev->bd_super = NULL;
                bdev->bd_inode = inode;
                bdev->bd_part_count = 0;
-               bdev->bd_flags = 0;
                inode->i_mode = S_IFBLK;
                inode->i_rdev = dev;
                inode->i_bdev = bdev;
@@ -1385,7 +1384,7 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate)
 
        lockdep_assert_held(&bdev->bd_mutex);
 
-       clear_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
+       clear_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
 
 rescan:
        ret = blk_drop_partitions(bdev);
@@ -1509,7 +1508,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, void *holder,
                         * The latter is necessary to prevent ghost
                         * partitions on a removed medium.
                         */
-                       if (test_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags) &&
+                       if (test_bit(GD_NEED_PART_SCAN, &disk->state) &&
                            (!ret || ret == -ENOMEDIUM))
                                bdev_disk_changed(bdev, ret == -ENOMEDIUM);
 
@@ -1539,7 +1538,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, void *holder,
                        if (bdev->bd_disk->fops->open)
                                ret = bdev->bd_disk->fops->open(bdev, mode);
                        /* the same as first opener case, read comment there */
-                       if (test_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags) &&
+                       if (test_bit(GD_NEED_PART_SCAN, &disk->state) &&
                            (!ret || ret == -ENOMEDIUM))
                                bdev_disk_changed(bdev, ret == -ENOMEDIUM);
                        if (ret)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 6ffa783..eb20e28 100644 (file)
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -19,8 +19,6 @@ struct cgroup_subsys_state;
 typedef void (bio_end_io_t) (struct bio *);
 struct bio_crypt_ctx;
 
-#define BDEV_NEED_PART_SCAN            0
-
 struct block_device {
        dev_t                   bd_dev;
        int                     bd_openers;
@@ -39,7 +37,7 @@ struct block_device {
        struct hd_struct *      bd_part;
        /* number of times partitions within this device have been opened. */
        unsigned                bd_part_count;
-       unsigned long           bd_flags;
+
        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 1c97cf8..38f23d7 100644 (file)
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -191,6 +191,8 @@ struct gendisk {
        void *private_data;
 
        int flags;
+       unsigned long state;
+#define GD_NEED_PART_SCAN              0
        struct rw_semaphore lookup_sem;
        struct kobject *slave_dir;