iomap: mark the iomap argument to iomap_read_page_sync const

iomap_read_page_sync never modifies the passed in iomap, so mark
it const.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index b8a1ba3..0273aed 100644 (file)
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -531,7 +531,7 @@ iomap_write_failed(struct inode *inode, loff_t pos, unsigned len)
 
 static int
 iomap_read_page_sync(loff_t block_start, struct page *page, unsigned poff,
-               unsigned plen, struct iomap *iomap)
+               unsigned plen, const struct iomap *iomap)
 {
        struct bio_vec bvec;
        struct bio bio;