block: Get rid of blk_get_backing_dev_info()
blk_get_backing_dev_info() is now a simple dereference. Remove that
function and simplify some code around that.
Change-Id: I8ed9ffc88b53f3967adf93c7bc66be4282500e6d
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
Git-commit: efa7c9f97e3ef624e9a398bf69c15f58eea9f0e8
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
[riteshh@codeaurora.org: Resolved merge conflicts]
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
diff --git a/block/blk-core.c b/block/blk-core.c
index 43402d9..ffe0153 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -105,20 +105,6 @@
q->nr_congestion_off = nr;
}
-/**
- * blk_get_backing_dev_info - get the address of a queue's backing_dev_info
- * @bdev: device
- *
- * Locates the passed device's request queue and returns the address of its
- * backing_dev_info. The return value is never NULL however we may return
- * &noop_backing_dev_info if the bdev is not currently open.
- */
-struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
-{
- return bdev->bd_bdi;
-}
-EXPORT_SYMBOL(blk_get_backing_dev_info);
-
void blk_rq_init(struct request_queue *q, struct request *rq)
{
memset(rq, 0, sizeof(*rq));
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 556826a..570021a 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -661,7 +661,6 @@
struct block_device *bdev = inode->i_bdev;
struct gendisk *disk = bdev->bd_disk;
fmode_t mode = file->f_mode;
- struct backing_dev_info *bdi;
loff_t size;
unsigned int max_sectors;
@@ -708,9 +707,8 @@
case BLKFRAGET:
if (!arg)
return -EINVAL;
- bdi = blk_get_backing_dev_info(bdev);
return compat_put_long(arg,
- (bdi->ra_pages * PAGE_SIZE) / 512);
+ (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
case BLKROGET: /* compatible */
return compat_put_int(arg, bdev_read_only(bdev) != 0);
case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
@@ -728,8 +726,7 @@
case BLKFRASET:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- bdi = blk_get_backing_dev_info(bdev);
- bdi->ra_pages = (arg * 512) / PAGE_SIZE;
+ bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
return 0;
case BLKGETSIZE:
size = i_size_read(bdev->bd_inode);
diff --git a/block/ioctl.c b/block/ioctl.c
index 755119c..c4555b1 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -502,7 +502,6 @@
int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
{
- struct backing_dev_info *bdi;
void __user *argp = (void __user *)arg;
loff_t size;
unsigned int max_sectors;
@@ -525,8 +524,7 @@
case BLKFRAGET:
if (!arg)
return -EINVAL;
- bdi = blk_get_backing_dev_info(bdev);
- return put_long(arg, (bdi->ra_pages * PAGE_SIZE) / 512);
+ return put_long(arg, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
case BLKROGET:
return put_int(arg, bdev_read_only(bdev) != 0);
case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
@@ -553,8 +551,7 @@
case BLKFRASET:
if(!capable(CAP_SYS_ADMIN))
return -EACCES;
- bdi = blk_get_backing_dev_info(bdev);
- bdi->ra_pages = (arg * 512) / PAGE_SIZE;
+ bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
return 0;
case BLKBSZSET:
return blkdev_bszset(bdev, mode, argp);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1cd3257..c66054c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1816,7 +1816,7 @@
list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) {
if (!device->bdev)
continue;
- bdi = blk_get_backing_dev_info(device->bdev);
+ bdi = device->bdev->bd_bdi;
if (bdi_congested(bdi, bdi_bits)) {
ret = 1;
break;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 06a77e4..fad7b37 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -366,7 +366,7 @@
*/
blk_start_plug(&plug);
- bdi = blk_get_backing_dev_info(device->bdev);
+ bdi = device->bdev->bd_bdi;
fs_info = device->dev_root->fs_info;
limit = btrfs_async_submit_limit(fs_info);
limit = limit * 2 / 3;
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 3f45d98..7a04b03 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -744,7 +744,7 @@
int nmaps,
const struct xfs_buf_ops *ops)
{
- if (bdi_read_congested(target->bt_bdi))
+ if (bdi_read_congested(target->bt_bdev->bd_bdi))
return;
xfs_buf_read_map(target, map, nmaps,
@@ -1782,7 +1782,6 @@
btp->bt_mount = mp;
btp->bt_dev = bdev->bd_dev;
btp->bt_bdev = bdev;
- btp->bt_bdi = blk_get_backing_dev_info(bdev);
if (xfs_setsize_buftarg_early(btp, bdev))
goto error_free;
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index f961b19..c26b36a 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -107,7 +107,6 @@
typedef struct xfs_buftarg {
dev_t bt_dev;
struct block_device *bt_bdev;
- struct backing_dev_info *bt_bdi;
struct xfs_mount *bt_mount;
unsigned int bt_meta_sectorsize;
size_t bt_meta_sectormask;
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index efb6ca9..c52a48c 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -191,7 +191,7 @@
sb = inode->i_sb;
#ifdef CONFIG_BLOCK
if (sb_is_blkdev_sb(sb))
- return blk_get_backing_dev_info(I_BDEV(inode));
+ return I_BDEV(inode)->bd_bdi;
#endif
return sb->s_bdi;
}
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b4ce3a1..46cd13d 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1031,7 +1031,6 @@
extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable);
extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
-extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
extern int blk_rq_map_sg_no_cluster(struct request_queue *q, struct request *rq,