Staging: Fixed pohmelfs regression because of per-bdi writeback.
Since pohmelfs isn't tied to a single block device, it needs to setup a
backing dev like nfs/btrfs/etc do.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index 6a978c8..eec3798 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -36,6 +36,7 @@
#define POHMELFS_MAGIC_NUM 0x504f482e
static struct kmem_cache *pohmelfs_inode_cache;
+static atomic_t psb_bdi_num = ATOMIC_INIT(0);
/*
* Removes inode from all trees, drops local name cache and removes all queued
@@ -1331,6 +1332,8 @@
pohmelfs_crypto_exit(psb);
pohmelfs_state_exit(psb);
+ bdi_destroy(&psb->bdi);
+
kfree(psb);
sb->s_fs_info = NULL;
}
@@ -1814,11 +1817,22 @@
if (!psb)
goto err_out_exit;
+ err = bdi_init(&psb->bdi);
+ if (err)
+ goto err_out_free_sb;
+
+ err = bdi_register(&psb->bdi, NULL, "pfs-%d", atomic_inc_return(&psb_bdi_num));
+ if (err) {
+ bdi_destroy(&psb->bdi);
+ goto err_out_free_sb;
+ }
+
sb->s_fs_info = psb;
sb->s_op = &pohmelfs_sb_ops;
sb->s_magic = POHMELFS_MAGIC_NUM;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_SIZE;
+ sb->s_bdi = &psb->bdi;
psb->sb = sb;
@@ -1862,11 +1876,11 @@
err = pohmelfs_parse_options((char *) data, psb, 0);
if (err)
- goto err_out_free_sb;
+ goto err_out_free_bdi;
err = pohmelfs_copy_crypto(psb);
if (err)
- goto err_out_free_sb;
+ goto err_out_free_bdi;
err = pohmelfs_state_init(psb);
if (err)
@@ -1915,6 +1929,8 @@
err_out_free_strings:
kfree(psb->cipher_string);
kfree(psb->hash_string);
+err_out_free_bdi:
+ bdi_destroy(&psb->bdi);
err_out_free_sb:
kfree(psb);
err_out_exit: