mm/hugetlb: constify ctl_table arguments of utility functions

The sysctl core is preparing to only expose instances of struct ctl_table
as "const".  This will also affect the ctl_table argument of sysctl
handlers.

As the function prototype of all sysctl handlers throughout the tree
needs to stay consistent that change will be done in one commit.

To reduce the size of that final commit, switch utility functions which
are not bound by "typedef proc_handler" to "const struct ctl_table".

No functional change.

Link: https://lkml.kernel.org/r/20240518-sysctl-const-handler-hugetlb-v1-1-47e34e2871b2@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: Joel Granados <j.granados@samsung.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f35abff8be60f8703d7e36bdd1c21aa94eaeff76..04f8d0ac069cc50b8d96f508e0f52982a47f2df2 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4911,7 +4911,7 @@ static unsigned int allowed_mems_nr(struct hstate *h)
 }
 
 #ifdef CONFIG_SYSCTL
-static int proc_hugetlb_doulongvec_minmax(struct ctl_table *table, int write,
+static int proc_hugetlb_doulongvec_minmax(const struct ctl_table *table, int write,
                                          void *buffer, size_t *length,
                                          loff_t *ppos, unsigned long *out)
 {
@@ -4928,7 +4928,7 @@ static int proc_hugetlb_doulongvec_minmax(struct ctl_table *table, int write,
 }
 
 static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
-                        struct ctl_table *table, int write,
+                        const struct ctl_table *table, int write,
                         void *buffer, size_t *length, loff_t *ppos)
 {
        struct hstate *h = &default_hstate;