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 78eb4ea ("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>

Author: Joelgranados

arch/arm/kernel/isa.c

@@ -16,7 +16,7 @@
 
 static unsigned int isa_membase, isa_portbase, isa_portshift;
 
-static struct ctl_table ctl_isa_vars[] = {
+static const struct ctl_table ctl_isa_vars[] = {
 	{
 		.procname	= "membase",
 		.data		= &isa_membase, 

arch/arm64/kernel/fpsimd.c

@@ -562,7 +562,7 @@ static int vec_proc_do_default_vl(const struct ctl_table *table, int write,
 	return 0;
 }
 
-static struct ctl_table sve_default_vl_table[] = {
+static const struct ctl_table sve_default_vl_table[] = {
 	{
 		.procname	= "sve_default_vector_length",
 		.mode		= 0644,
@@ -585,7 +585,7 @@ static int __init sve_sysctl_init(void) { return 0; }
 #endif /* ! (CONFIG_ARM64_SVE && CONFIG_SYSCTL) */
 
 #if defined(CONFIG_ARM64_SME) && defined(CONFIG_SYSCTL)
-static struct ctl_table sme_default_vl_table[] = {
+static const struct ctl_table sme_default_vl_table[] = {
 	{
 		.procname	= "sme_default_vector_length",
 		.mode		= 0644,

arch/arm64/kernel/process.c

@@ -859,7 +859,7 @@ long get_tagged_addr_ctrl(struct task_struct *task)
  * disable it for tasks that already opted in to the relaxed ABI.
  */
 
-static struct ctl_table tagged_addr_sysctl_table[] = {
+static const struct ctl_table tagged_addr_sysctl_table[] = {
 	{
 		.procname	= "tagged_addr_disabled",
 		.mode		= 0644,

arch/powerpc/kernel/idle.c

@@ -97,7 +97,7 @@ void power4_idle(void)
 /*
  * Register the sysctl to set/clear powersave_nap.
  */
-static struct ctl_table powersave_nap_ctl_table[] = {
+static const struct ctl_table powersave_nap_ctl_table[] = {
 	{
 		.procname	= "powersave-nap",
 		.data		= &powersave_nap,

arch/powerpc/platforms/pseries/mobility.c

@@ -53,7 +53,7 @@ struct update_props_workarea {
 static unsigned int nmi_wd_lpm_factor = 200;
 
 #ifdef CONFIG_SYSCTL
-static struct ctl_table nmi_wd_lpm_factor_ctl_table[] = {
+static const struct ctl_table nmi_wd_lpm_factor_ctl_table[] = {
 	{
 		.procname	= "nmi_wd_lpm_factor",
 		.data		= &nmi_wd_lpm_factor,

arch/riscv/kernel/process.c

@@ -364,7 +364,7 @@ static bool try_to_set_pmm(unsigned long value)
  * disable it for tasks that already opted in to the relaxed ABI.
  */
 
-static struct ctl_table tagged_addr_sysctl_table[] = {
+static const struct ctl_table tagged_addr_sysctl_table[] = {
 	{
 		.procname	= "tagged_addr_disabled",
 		.mode		= 0644,

arch/riscv/kernel/vector.c

@@ -287,7 +287,7 @@ long riscv_v_vstate_ctrl_set_current(unsigned long arg)
 
 #ifdef CONFIG_SYSCTL
 
-static struct ctl_table riscv_v_default_vstate_table[] = {
+static const struct ctl_table riscv_v_default_vstate_table[] = {
 	{
 		.procname	= "riscv_v_default_allow",
 		.data		= &riscv_v_implicit_uacc,

arch/s390/appldata/appldata_base.c

@@ -52,7 +52,7 @@ static int appldata_interval_handler(const struct ctl_table *ctl, int write,
 				     void *buffer, size_t *lenp, loff_t *ppos);
 
 static struct ctl_table_header *appldata_sysctl_header;
-static struct ctl_table appldata_table[] = {
+static const struct ctl_table appldata_table[] = {
 	{
 		.procname	= "timer",
 		.mode		= S_IRUGO | S_IWUSR,

arch/s390/kernel/debug.c

@@ -1122,7 +1122,7 @@ static int s390dbf_procactive(const struct ctl_table *table, int write,
 		return 0;
 }
 
-static struct ctl_table s390dbf_table[] = {
+static const struct ctl_table s390dbf_table[] = {
 	{
 		.procname	= "debug_stoppable",
 		.data		= &debug_stoppable,

arch/s390/kernel/hiperdispatch.c

@@ -292,7 +292,7 @@ static int hiperdispatch_ctl_handler(const struct ctl_table *ctl, int write,
 	return 0;
 }
 
-static struct ctl_table hiperdispatch_ctl_table[] = {
+static const struct ctl_table hiperdispatch_ctl_table[] = {
 	{
 		.procname	= "hiperdispatch",
 		.mode		= 0644,