block: constify ext_pi_ref_escape()

This function doesn't mutate data.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/d24611b3-dddf-473a-903d-39290db03b11@p183
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/t10-pi.c b/block/t10-pi.c
index 4a90d200ae7bb1e41f09392e1aee39feecf87b28..e7052a728966fa58ecaa7668ddb9d2fd024d4e84 100644 (file)
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -239,9 +239,9 @@ static void ext_pi_crc64_generate(struct blk_integrity_iter *iter,
        }
 }
 
-static bool ext_pi_ref_escape(u8 *ref_tag)
+static bool ext_pi_ref_escape(const u8 ref_tag[6])
 {
-       static u8 ref_escape[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+       static const u8 ref_escape[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
        return memcmp(ref_tag, ref_escape, sizeof(ref_escape)) == 0;
 }