linux-kernel - [PATCH] watchdog/core: remove sysctl handlers from public header

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Date: Wed, 06 Mar 2024 07:49:16 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] watchdog/core: remove sysctl handlers from public header

The functions are only used in the file where they are defined.
Remove them from the header and make them static.

Also guard proc_soft_watchdog with a #define-guard as it is not used
otherwise.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 include/linux/nmi.h |  7 -------
 kernel/watchdog.c   | 22 ++++++++++++----------
 2 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index e92e378df000..f53438eae815 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -216,13 +216,6 @@ void watchdog_update_hrtimer_threshold(u64 period);
 static inline void watchdog_update_hrtimer_threshold(u64 period) { }
 #endif
 
-struct ctl_table;
-int proc_watchdog(struct ctl_table *, int, void *, size_t *, loff_t *);
-int proc_nmi_watchdog(struct ctl_table *, int , void *, size_t *, loff_t *);
-int proc_soft_watchdog(struct ctl_table *, int , void *, size_t *, loff_t *);
-int proc_watchdog_thresh(struct ctl_table *, int , void *, size_t *, loff_t *);
-int proc_watchdog_cpumask(struct ctl_table *, int, void *, size_t *, loff_t *);
-
 #ifdef CONFIG_HAVE_ACPI_APEI_NMI
 #include <asm/nmi.h>
 #endif
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 81a8862295d6..d7b2125503af 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -796,8 +796,8 @@ static int proc_watchdog_common(int which, struct ctl_table *table, int write,
 /*
  * /proc/sys/kernel/watchdog
  */
-int proc_watchdog(struct ctl_table *table, int write,
-		  void *buffer, size_t *lenp, loff_t *ppos)
+static int proc_watchdog(struct ctl_table *table, int write,
+			 void *buffer, size_t *lenp, loff_t *ppos)
 {
 	return proc_watchdog_common(WATCHDOG_HARDLOCKUP_ENABLED |
 				    WATCHDOG_SOFTOCKUP_ENABLED,
@@ -807,8 +807,8 @@ int proc_watchdog(struct ctl_table *table, int write,
 /*
  * /proc/sys/kernel/nmi_watchdog
  */
-int proc_nmi_watchdog(struct ctl_table *table, int write,
-		      void *buffer, size_t *lenp, loff_t *ppos)
+static int proc_nmi_watchdog(struct ctl_table *table, int write,
+			     void *buffer, size_t *lenp, loff_t *ppos)
 {
 	if (!watchdog_hardlockup_available && write)
 		return -ENOTSUPP;
@@ -816,21 +816,23 @@ int proc_nmi_watchdog(struct ctl_table *table, int write,
 				    table, write, buffer, lenp, ppos);
 }
 
+#ifdef CONFIG_SOFTLOCKUP_DETECTOR
 /*
  * /proc/sys/kernel/soft_watchdog
  */
-int proc_soft_watchdog(struct ctl_table *table, int write,
-			void *buffer, size_t *lenp, loff_t *ppos)
+static int proc_soft_watchdog(struct ctl_table *table, int write,
+			      void *buffer, size_t *lenp, loff_t *ppos)
 {
 	return proc_watchdog_common(WATCHDOG_SOFTOCKUP_ENABLED,
 				    table, write, buffer, lenp, ppos);
 }
+#endif
 
 /*
  * /proc/sys/kernel/watchdog_thresh
  */
-int proc_watchdog_thresh(struct ctl_table *table, int write,
-			 void *buffer, size_t *lenp, loff_t *ppos)
+static int proc_watchdog_thresh(struct ctl_table *table, int write,
+				void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int err, old;
 
@@ -852,8 +854,8 @@ int proc_watchdog_thresh(struct ctl_table *table, int write,
  * user to specify a mask that will include cpus that have not yet
  * been brought online, if desired.
  */
-int proc_watchdog_cpumask(struct ctl_table *table, int write,
-			  void *buffer, size_t *lenp, loff_t *ppos)
+static int proc_watchdog_cpumask(struct ctl_table *table, int write,
+				 void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int err;
 

---
base-commit: 5847c9777c303a792202c609bd761dceb60f4eed
change-id: 20240306-const-sysctl-prep-watchdog-fc8cdd6424c9

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>