# \[PATCH 06/26\] ath: constify local structures

- From: Julia Lawall \<hidden\>
- Date: 2016-09-11 13:26:26 
- List: netdev
- Page: https://ratatoskr.run/netdev/2016/09/4833320
- Thread: https://ratatoskr.run/kernel-janitors/2016/09/4833330/t.md

```text
For structure types defined in the same file or local header files, find
top-level static structure declarations that have the following
properties:
1. Never reassigned.
2. Address never taken
3. Not passed to a top-level macro call
4. No pointer or array-typed field passed to a function or stored in a
variable.
Declare structures having all of these properties as const.

Done using Coccinelle.
Based on a suggestion by Joe Perches [ref].

Signed-off-by: Julia Lawall <redacted>

---
The semantic patch seems too long for a commit log, but is in the cover
letter.

 drivers/net/wireless/ath/dfs_pattern_detector.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/dfs_pattern_detector.c b/drivers/net/wireless/ath/dfs_pattern_detector.c
index 2f8136d..4100ffd 100644
--- a/drivers/net/wireless/ath/dfs_pattern_detector.c
+++ b/drivers/net/wireless/ath/dfs_pattern_detector.c
@@ -338,7 +338,7 @@ static bool dpd_set_domain(struct dfs_pattern_detector *dpd,
 	return true;
 }
 
-static struct dfs_pattern_detector default_dpd = {
+static const struct dfs_pattern_detector default_dpd = {
 	.exit		= dpd_exit,
 	.set_dfs_domain	= dpd_set_domain,
 	.add_pulse	= dpd_add_pulse,

```