btrfs: document more parameters of submit_extent_page
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index fecf1e5..f27bad0 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2746,7 +2746,19 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
/*
* @opf: bio REQ_OP_* and REQ_* flags as one value
+ * @tree: tree so we can call our merge_bio hook
+ * @wbc: optional writeback control for io accounting
+ * @page: page to add to the bio
+ * @pg_offset: offset of the new bio or to check whether we are adding
+ * a contiguous page to the previous one
+ * @size: portion of page that we want to write
+ * @offset: starting offset in the page
+ * @bdev: attach newly created bios to this bdev
* @bio_ret: must be valid pointer, newly allocated bio will be stored there
+ * @end_io_func: end_io callback for new bio
+ * @mirror_num: desired mirror to read/write
+ * @prev_bio_flags: flags of previous bio to see if we can merge the current one
+ * @bio_flags: flags of the current bio to see if we can merge them
*/
static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
struct writeback_control *wbc,