sysctl: treewide: constify the ctl_table argument of proc_handlers

const qualify the struct ctl_table argument in the proc_handler function
signatures. This is a prerequisite to moving the static ctl_table
structs into .rodata data which will ensure that proc_handler function
pointers cannot be modified.

This patch has been generated by the following coccinelle script:

```
  virtual patch

  @r1@
  identifier ctl, write, buffer, lenp, ppos;
  identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)";
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int write, void *buffer, size_t *lenp, loff_t *ppos);

  @r2@
  identifier func, ctl, write, buffer, lenp, ppos;
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int write, void *buffer, size_t *lenp, loff_t *ppos)
  { ... }

  @r3@
  identifier func;
  @@

  int func(
  - struct ctl_table *
  + const struct ctl_table *
    ,int , void *, size_t *, loff_t *);

  @r4@
  identifier func, ctl;
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int , void *, size_t *, loff_t *);

  @r5@
  identifier func, write, buffer, lenp, ppos;
  @@

  int func(
  - struct ctl_table *
  + const struct ctl_table *
    ,int write, void *buffer, size_t *lenp, loff_t *ppos);

```

* Code formatting was adjusted in xfs_sysctl.c to comply with code
  conventions. The xfs_stats_clear_proc_handler,
  xfs_panic_mask_proc_handler and xfs_deprecated_dointvec_minmax where
  adjusted.

* The ctl_table argument in proc_watchdog_common was const qualified.
  This is called from a proc_handler itself and is calling back into
  another proc_handler, making it necessary to change it as part of the
  proc_handler migration.

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

1 files changed, 14 insertions, 14 deletions

diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 61c6f3027e7f..e5a5af343c4c 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -43,19 +43,19 @@ static unsigned long max_autoclose_max =
 	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
 	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
 
-static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
+static int proc_sctp_do_hmac_alg(const struct ctl_table *ctl, int write,
 				 void *buffer, size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
+static int proc_sctp_do_rto_min(const struct ctl_table *ctl, int write,
 				void *buffer, size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write, void *buffer,
+static int proc_sctp_do_rto_max(const struct ctl_table *ctl, int write, void *buffer,
 				size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_udp_port(struct ctl_table *ctl, int write, void *buffer,
+static int proc_sctp_do_udp_port(const struct ctl_table *ctl, int write, void *buffer,
 				 size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
+static int proc_sctp_do_alpha_beta(const struct ctl_table *ctl, int write,
 				   void *buffer, size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
+static int proc_sctp_do_auth(const struct ctl_table *ctl, int write,
 			     void *buffer, size_t *lenp, loff_t *ppos);
-static int proc_sctp_do_probe_interval(struct ctl_table *ctl, int write,
+static int proc_sctp_do_probe_interval(const struct ctl_table *ctl, int write,
 				       void *buffer, size_t *lenp, loff_t *ppos);
 
 static struct ctl_table sctp_table[] = {
@@ -384,7 +384,7 @@ static struct ctl_table sctp_net_table[] = {
 	},
 };
 
-static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
+static int proc_sctp_do_hmac_alg(const struct ctl_table *ctl, int write,
 				 void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;
@@ -429,7 +429,7 @@ static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
+static int proc_sctp_do_rto_min(const struct ctl_table *ctl, int write,
 				void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;
@@ -457,7 +457,7 @@ static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
+static int proc_sctp_do_rto_max(const struct ctl_table *ctl, int write,
 				void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;
@@ -485,7 +485,7 @@ static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
+static int proc_sctp_do_alpha_beta(const struct ctl_table *ctl, int write,
 				   void *buffer, size_t *lenp, loff_t *ppos)
 {
 	if (write)
@@ -495,7 +495,7 @@ static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
 	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
 }
 
-static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
+static int proc_sctp_do_auth(const struct ctl_table *ctl, int write,
 			     void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;
@@ -524,7 +524,7 @@ static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int proc_sctp_do_udp_port(struct ctl_table *ctl, int write,
+static int proc_sctp_do_udp_port(const struct ctl_table *ctl, int write,
 				 void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;
@@ -565,7 +565,7 @@ static int proc_sctp_do_udp_port(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int proc_sctp_do_probe_interval(struct ctl_table *ctl, int write,
+static int proc_sctp_do_probe_interval(const struct ctl_table *ctl, int write,
 				       void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct net *net = current->nsproxy->net_ns;