iomap: mark the iomap argument to iomap_inline_data_valid const

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

include/linux/iomap.h

@@ -109,7 +109,7 @@ static inline void *iomap_inline_data(const struct iomap *iomap, loff_t pos)
  * This is used to guard against accessing data beyond the page inline_data
  * points at.
  */
-static inline bool iomap_inline_data_valid(struct iomap *iomap)
+static inline bool iomap_inline_data_valid(const struct iomap *iomap)
 {
 	return iomap->length <= PAGE_SIZE - offset_in_page(iomap->inline_data);
 }