mm: don't include <linux/blkdev.h> in <linux/backing-dev.h>
Move inode_to_bdi out of line to avoid having to include blkdev.h.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20210920123328.1399408-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 5245744..c878d99 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -978,6 +978,22 @@ void bdi_put(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL(bdi_put);
+struct backing_dev_info *inode_to_bdi(struct inode *inode)
+{
+ struct super_block *sb;
+
+ if (!inode)
+ return &noop_backing_dev_info;
+
+ sb = inode->i_sb;
+#ifdef CONFIG_BLOCK
+ if (sb_is_blkdev_sb(sb))
+ return I_BDEV(inode)->bd_disk->bdi;
+#endif
+ return sb->s_bdi;
+}
+EXPORT_SYMBOL(inode_to_bdi);
+
const char *bdi_dev_name(struct backing_dev_info *bdi)
{
if (!bdi || !bdi->dev)
