From 7e6cea5ae2f5e62112fce69acc07ee8b694b6dd0 Mon Sep 17 00:00:00 2001 From: Joanne Koong Date: Tue, 11 Nov 2025 11:36:52 -0800 Subject: docs: document iomap writeback's iomap_finish_folio_write() requirement Document that iomap_finish_folio_write() must be called after writeback on the range completes. Signed-off-by: Joanne Koong Link: https://patch.msgid.link/20251111193658.3495942-4-joannelkoong@gmail.com Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Christian Brauner --- include/linux/iomap.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 8b1ac08c7474..a5032e456079 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -435,6 +435,10 @@ struct iomap_writeback_ops { * An existing mapping from a previous call to this method can be reused * by the file system if it is still valid. * + * If this succeeds, iomap_finish_folio_write() must be called once + * writeback completes for the range, regardless of whether the + * writeback succeeded or failed. + * * Returns the number of bytes processed or a negative errno. */ ssize_t (*writeback_range)(struct iomap_writepage_ctx *wpc, -- cgit v1.2.3