diff options
| author |   Jan Kara <jack@suse.cz> | 2017-04-12 12:24:37 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2017-04-20 12:09:55 -0600 |
| commit | fa06052d637bf3a76f18cd2304048b866af4096e (patch) | |
| tree | 7516fc2e1008907e50a7f860d3f21aee65638223 /drivers/mtd/mtdsuper.c | |
| parent | afs: Convert to separately allocated bdi (diff) | |
| download | linux-dev-fa06052d637bf3a76f18cd2304048b866af4096e.tar.xz linux-dev-fa06052d637bf3a76f18cd2304048b866af4096e.zip | |
mtd: Convert to dynamically allocated bdi infrastructure
MTD already allocates backing_dev_info dynamically. Convert it to use
generic infrastructure for this including proper refcounting. We drop
mtd->backing_dev_info as its only use was to pass mtd_bdi pointer from
one file into another and if we wanted to keep that in a clean way, we'd
have to make mtd hold and drop bdi reference as needed which seems
pointless for passing one global pointer...
CC: David Woodhouse <dwmw2@infradead.org>
CC: Brian Norris <computersforpeace@gmail.com>
CC: linux-mtd@lists.infradead.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/mtd/mtdsuper.c')
| -rw-r--r-- | drivers/mtd/mtdsuper.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c index 20c02a3b7417..e69e7855e31f 100644 --- a/drivers/mtd/mtdsuper.c +++ b/drivers/mtd/mtdsuper.c @@ -18,6 +18,7 @@ #include <linux/ctype.h> #include <linux/slab.h> #include <linux/major.h> +#include <linux/backing-dev.h> /* * compare superblocks to see if they're equivalent @@ -38,6 +39,8 @@ static int get_sb_mtd_compare(struct super_block *sb, void *_mtd) return 0; } +extern struct backing_dev_info *mtd_bdi; + /* * mark the superblock by the MTD device it is using * - set the device number to be the correct MTD block device for pesuperstence @@ -49,7 +52,9 @@ static int get_sb_mtd_set(struct super_block *sb, void *_mtd) sb->s_mtd = mtd; sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index); - sb->s_bdi = mtd->backing_dev_info; + sb->s_bdi = bdi_get(mtd_bdi); + sb->s_iflags |= SB_I_DYNBDI; + return 0; } |