diff options
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index f52597172c8b..08158bb2e76c 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -876,6 +876,7 @@ struct block_device *bdget(dev_t dev) bdev = &BDEV_I(inode)->bdev; if (inode->i_state & I_NEW) { + spin_lock_init(&bdev->bd_size_lock); bdev->bd_contains = NULL; bdev->bd_super = NULL; bdev->bd_inode = inode; @@ -1290,6 +1291,7 @@ static void check_disk_size_change(struct gendisk *disk, { loff_t disk_size, bdev_size; + spin_lock(&bdev->bd_size_lock); disk_size = (loff_t)get_capacity(disk) << 9; bdev_size = i_size_read(bdev->bd_inode); if (disk_size != bdev_size) { @@ -1299,11 +1301,15 @@ static void check_disk_size_change(struct gendisk *disk, disk->disk_name, bdev_size, disk_size); } i_size_write(bdev->bd_inode, disk_size); - if (bdev_size > disk_size && __invalidate_device(bdev, false)) + } + bdev->bd_invalidated = 0; + spin_unlock(&bdev->bd_size_lock); + + if (bdev_size > disk_size) { + if (__invalidate_device(bdev, false)) pr_warn("VFS: busy inodes on resized disk %s\n", disk->disk_name); } - bdev->bd_invalidated = 0; } /** @@ -1328,13 +1334,10 @@ int revalidate_disk(struct gendisk *disk) if (!(disk->flags & GENHD_FL_HIDDEN)) { struct block_device *bdev = bdget_disk(disk, 0); - if (!bdev) - return ret; - - mutex_lock(&bdev->bd_mutex); - check_disk_size_change(disk, bdev, ret == 0); - mutex_unlock(&bdev->bd_mutex); - bdput(bdev); + if (bdev) { + check_disk_size_change(disk, bdev, ret == 0); + bdput(bdev); + } } return ret; } @@ -1373,9 +1376,9 @@ EXPORT_SYMBOL(check_disk_change); void bd_set_nr_sectors(struct block_device *bdev, sector_t sectors) { - inode_lock(bdev->bd_inode); + spin_lock(&bdev->bd_size_lock); i_size_write(bdev->bd_inode, (loff_t)sectors << SECTOR_SHIFT); - inode_unlock(bdev->bd_inode); + spin_unlock(&bdev->bd_size_lock); } EXPORT_SYMBOL(bd_set_nr_sectors); |