fuse: Get rid of bdi_initialized

It is not needed anymore since bdi is initialized whenever superblock
exists.

CC: Miklos Szeredi <miklos@szeredi.hu>
CC: linux-fsdevel@vger.kernel.org
Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

fs/fuse/dev.c

@@ -382,7 +382,7 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
 			wake_up(&fc->blocked_waitq);
 
 		if (fc->num_background == fc->congestion_threshold &&
-		    fc->connected && fc->bdi_initialized) {
+		    fc->connected && fc->sb) {
 			clear_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC);
 			clear_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC);
 		}
@@ -573,8 +573,7 @@ void fuse_request_send_background_locked(struct fuse_conn *fc,
 	fc->num_background++;
 	if (fc->num_background == fc->max_background)
 		fc->blocked = 1;
-	if (fc->num_background == fc->congestion_threshold &&
-	    fc->bdi_initialized) {
+	if (fc->num_background == fc->congestion_threshold && fc->sb) {
 		set_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC);
 		set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC);
 	}

fs/fuse/fuse_i.h

@@ -527,9 +527,6 @@ struct fuse_conn {
 	/** Filesystem supports NFS exporting.  Only set in INIT */
 	unsigned export_support:1;
 
-	/** Set if bdi is valid */
-	unsigned bdi_initialized:1;
-
 	/** write-back cache policy (default is write-through) */
 	unsigned writeback_cache:1;
 

fs/fuse/inode.c

@@ -983,8 +983,6 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
 	/* fuse does it's own writeback accounting */
 	sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;
 
-	fc->bdi_initialized = 1;
-
 	/*
 	 * For a single fuse filesystem use max 1% of dirty +
 	 * writeback threshold.