linux-ext4 - [PATCH 6/6] iomap: add private pointer to struct iomap

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Message-Id: <20180619164137.13720-7-hch@lst.de>
Date:   Tue, 19 Jun 2018 18:41:36 +0200
From:   Christoph Hellwig <hch@....de>
To:     Andreas Gruenbacher <agruenba@...hat.com>,
        linux-xfs@...r.kernel.org
Cc:     Dan Williams <dan.j.williams@...el.com>,
        linux-fsdevel@...r.kernel.org, cluster-devel@...hat.com,
        linux-ext4@...r.kernel.org
Subject: [PATCH 6/6] iomap: add private pointer to struct iomap

From: Andreas Gruenbacher <agruenba@...hat.com>

Add a private pointer to struct iomap to allow filesystems to pass data
from iomap_begin to iomap_end.  Will be used by gfs2 for passing on the
on-disk inode buffer head.

Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>
Signed-off-by: Christoph Hellwig <hch@....de>
---
 include/linux/iomap.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 45f43865b0f0..1f36523d448a 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -57,6 +57,7 @@ struct iomap {
 	struct block_device	*bdev;	/* block device for I/O */
 	struct dax_device	*dax_dev; /* dax_dev for dax operations */
 	void			*inline_data;
+	void			*private; /* filesystem private */
 
 	/*
 	 * Called when finished processing a page in the mapping returned in
-- 
2.17.1