sysctl: treewide: constify argument ctl_table_root::permissions(table)

The permissions callback should not modify the ctl_table. Enforce this
expectation via the typesystem. This is a step to put "struct ctl_table"
into .rodata throughout the kernel.

The patch was created with the following coccinelle script:

  @@
  identifier func, head, ctl;
  @@

  int func(
    struct ctl_table_header *head,
  - struct ctl_table *ctl)
  + const struct ctl_table *ctl)
  { ... }

(insert_entry() from fs/proc/proc_sysctl.c is a false-positive)

No additional occurrences of '.permissions =' were found after a
tree-wide search for places missed by the conccinelle script.

Reviewed-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Joel Granados <j.granados@samsung.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/ucount.c b/kernel/ucount.c
index e196da0204dc..4d5b9c12c014 100644
--- a/kernel/ucount.c
+++ b/kernel/ucount.c
@@ -38,7 +38,7 @@ static int set_is_seen(struct ctl_table_set *set)
 }
 
 static int set_permissions(struct ctl_table_header *head,
-				  struct ctl_table *table)
+			   const struct ctl_table *table)
 {
 	struct user_namespace *user_ns =
 		container_of(head->set, struct user_namespace, set);