treewide: const qualify ctl_tables where applicable

Add the const qualifier to all the ctl_tables in the tree except for
watchdog_hardlockup_sysctl, memory_allocation_profiling_sysctls,
loadpin_sysctl_table and the ones calling register_net_sysctl (./net,
drivers/inifiniband dirs). These are special cases as they use a
registration function with a non-const qualified ctl_table argument or
modify the arrays before passing them on to the registration function.

Constifying ctl_table structs will prevent the modification of
proc_handler function pointers as the arrays would reside in .rodata.
This is made possible after commit 78eb4ea25cd5 ("sysctl: treewide:
constify the ctl_table argument of proc_handlers") constified all the
proc_handlers.

Created this by running an spatch followed by a sed command:
Spatch:
    virtual patch

    @
    depends on !(file in "net")
    disable optional_qualifier
    @

    identifier table_name != {
      watchdog_hardlockup_sysctl,
      iwcm_ctl_table,
      ucma_ctl_table,
      memory_allocation_profiling_sysctls,
      loadpin_sysctl_table
    };
    @@

    + const
    struct ctl_table table_name [] = { ... };

sed:
    sed --in-place \
      -e "s/struct ctl_table .table = &uts_kern/const struct ctl_table *table = \&uts_kern/" \
      kernel/utsname_sysctl.c

Reviewed-by: Song Liu <song@kernel.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> # for kernel/trace/
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> # SCSI
Reviewed-by: Darrick J. Wong <djwong@kernel.org> # xfs
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Corey Minyard <cminyard@mvista.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Bill O'Donnell <bodonnel@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Acked-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Joel Granados <joel.granados@kernel.org>

7 files changed, 7 insertions, 7 deletions

diff --git a/mm/compaction.c b/mm/compaction.c
index 73e80b2fb22e..bcc0df0066dc 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -3272,7 +3272,7 @@ static int proc_dointvec_minmax_warn_RT_change(const struct ctl_table *table,
 	return ret;
 }
 
-static struct ctl_table vm_compaction[] = {
+static const struct ctl_table vm_compaction[] = {
 	{
 		.procname	= "compact_memory",
 		.data		= &sysctl_compact_memory,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 87761b042ed0..3b25b69aa94f 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4867,7 +4867,7 @@ out:
 	return ret;
 }
 
-static struct ctl_table hugetlb_table[] = {
+static const struct ctl_table hugetlb_table[] = {
 	{
 		.procname	= "nr_hugepages",
 		.data		= NULL,
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 57b7f591eee8..7735972add01 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -693,7 +693,7 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
 	free_vmemmap_page_list(&vmemmap_pages);
 }
 
-static struct ctl_table hugetlb_vmemmap_sysctls[] = {
+static const struct ctl_table hugetlb_vmemmap_sysctls[] = {
 	{
 		.procname	= "hugetlb_optimize_vmemmap",
 		.data		= &vmemmap_optimize_enabled,
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index a7b8ccd29b6f..995a15eb67e2 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -124,7 +124,7 @@ const struct attribute_group memory_failure_attr_group = {
 	.attrs = memory_failure_attr,
 };
 
-static struct ctl_table memory_failure_table[] = {
+static const struct ctl_table memory_failure_table[] = {
 	{
 		.procname	= "memory_failure_early_kill",
 		.data		= &sysctl_memory_failure_early_kill,
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 044ebab2c941..1cf121ad7085 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -705,7 +705,7 @@ static void queue_oom_reaper(struct task_struct *tsk)
 }
 
 #ifdef CONFIG_SYSCTL
-static struct ctl_table vm_oom_kill_table[] = {
+static const struct ctl_table vm_oom_kill_table[] = {
 	{
 		.procname	= "panic_on_oom",
 		.data		= &sysctl_panic_on_oom,
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 4f5970723cf2..eb55ece39c56 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2298,7 +2298,7 @@ static int page_writeback_cpu_online(unsigned int cpu)
 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
 static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
 
-static struct ctl_table vm_page_writeback_sysctls[] = {
+static const struct ctl_table vm_page_writeback_sysctls[] = {
 	{
 		.procname   = "dirty_background_ratio",
 		.data       = &dirty_background_ratio,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6e469c7ef9a4..579789600a3c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6166,7 +6166,7 @@ out:
 	return ret;
 }
 
-static struct ctl_table page_alloc_sysctl_table[] = {
+static const struct ctl_table page_alloc_sysctl_table[] = {
 	{
 		.procname	= "min_free_kbytes",
 		.data		= &min_free_kbytes,