linux-kernel - [PATCH] kernel/hung_task.c: set some hung_task.c variables storage-class-specifier to static

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Message-Id: <20230312164645.471259-1-trix@redhat.com>
Date:   Sun, 12 Mar 2023 12:46:45 -0400
From:   Tom Rix <trix@...hat.com>
To:     pmladek@...e.com, akpm@...ux-foundation.org, peterz@...radead.org,
        rafael.j.wysocki@...el.com, john.ogness@...utronix.de,
        linux@...musvillemoes.dk, ben.dooks@...ive.com,
        fuyuanli@...iglobal.com
Cc:     linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] kernel/hung_task.c: set some hung_task.c variables storage-class-specifier to static

smatch reports several warnings
kernel/hung_task.c:31:19: warning:
  symbol 'sysctl_hung_task_check_count' was not declared. Should it be static?
kernel/hung_task.c:50:29: warning:
  symbol 'sysctl_hung_task_check_interval_secs' was not declared. Should it be static?
kernel/hung_task.c:52:19: warning:
  symbol 'sysctl_hung_task_warnings' was not declared. Should it be static?
kernel/hung_task.c:75:28: warning:
  symbol 'sysctl_hung_task_panic' was not declared. Should it be static?

These variables are only used in hung_task.c, so they should be static

Signed-off-by: Tom Rix <trix@...hat.com>
---
 kernel/hung_task.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index 322813366c6c..9a24574988d2 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -28,7 +28,7 @@
 /*
  * The number of tasks checked:
  */
-int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT;
+static int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT;
 
 /*
  * Limit number of tasks checked in a batch.
@@ -47,9 +47,9 @@ unsigned long __read_mostly sysctl_hung_task_timeout_secs = CONFIG_DEFAULT_HUNG_
 /*
  * Zero (default value) means use sysctl_hung_task_timeout_secs:
  */
-unsigned long __read_mostly sysctl_hung_task_check_interval_secs;
+static unsigned long __read_mostly sysctl_hung_task_check_interval_secs;
 
-int __read_mostly sysctl_hung_task_warnings = 10;
+static int __read_mostly sysctl_hung_task_warnings = 10;
 
 static int __read_mostly did_panic;
 static bool hung_task_show_lock;
@@ -72,8 +72,8 @@ static unsigned int __read_mostly sysctl_hung_task_all_cpu_backtrace;
  * Should we panic (and reboot, if panic_timeout= is set) when a
  * hung task is detected:
  */
-unsigned int __read_mostly sysctl_hung_task_panic =
-				IS_ENABLED(CONFIG_BOOTPARAM_HUNG_TASK_PANIC);
+static unsigned int __read_mostly sysctl_hung_task_panic =
+	IS_ENABLED(CONFIG_BOOTPARAM_HUNG_TASK_PANIC);
 
 static int
 hung_task_panic(struct notifier_block *this, unsigned long event, void *ptr)
-- 
2.27.0