iomap: mark the iomap argument to iomap_inline_data 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>

include/linux/iomap.h

@@ -99,7 +99,7 @@ static inline sector_t iomap_sector(const struct iomap *iomap, loff_t pos)
 /*
  * Returns the inline data pointer for logical offset @pos.
  */
-static inline void *iomap_inline_data(struct iomap *iomap, loff_t pos)
+static inline void *iomap_inline_data(const struct iomap *iomap, loff_t pos)
 {
 	return iomap->inline_data + pos - iomap->offset;
 }