btrfs: constify buffers used by compression helpers

Signed-off-by: David Sterba <dsterba@suse.com>
2017-02-14 17:58:04 +01:00
parent 9ed573674a
commit 14a3357b40
3 changed files with 3 additions and 3 deletions
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -1015,7 +1015,7 @@ void btrfs_exit_compress(void)
 *
 * total_out is the last byte of the buffer
 */
-int btrfs_decompress_buf2page(char *buf, unsigned long buf_start,
+int btrfs_decompress_buf2page(const char *buf, unsigned long buf_start,
 			      unsigned long total_out, u64 disk_start,
 			      struct bio *bio)
 {