watchdog/core: Rename watchdog_proc_mutex

Following patches will use the mutex for other purposes as well. Rename it
as it is not longer a proc specific thing.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Don Zickus <dzickus@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Link: http://lkml.kernel.org/r/20170912194146.647714850@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index cd79f644ea34f868bb10835f9ca90bb13883ac28..7c3a0a76b41ba1350fd549dea5fc713140418f20 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -29,8 +29,7 @@
 #include <linux/kvm_para.h>
 #include <linux/kthread.h>
 
-/* Watchdog configuration */
-static DEFINE_MUTEX(watchdog_proc_mutex);
+static DEFINE_MUTEX(watchdog_mutex);
 
 int __read_mostly nmi_watchdog_enabled;
 
@@ -704,7 +703,7 @@ static int proc_watchdog_common(int which, struct ctl_table *table, int write,
        int *watchdog_param = (int *)table->data;
 
        cpu_hotplug_disable();
-       mutex_lock(&watchdog_proc_mutex);
+       mutex_lock(&watchdog_mutex);
 
        /*
         * If the parameter is being read return the state of the corresponding
@@ -751,7 +750,7 @@ static int proc_watchdog_common(int which, struct ctl_table *table, int write,
                err = proc_watchdog_update();
        }
 out:
-       mutex_unlock(&watchdog_proc_mutex);
+       mutex_unlock(&watchdog_mutex);
        cpu_hotplug_enable();
        return err;
 }
@@ -795,7 +794,7 @@ int proc_watchdog_thresh(struct ctl_table *table, int write,
        int err, old, new;
 
        cpu_hotplug_disable();
-       mutex_lock(&watchdog_proc_mutex);
+       mutex_lock(&watchdog_mutex);
 
        old = ACCESS_ONCE(watchdog_thresh);
        err = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
@@ -817,7 +816,7 @@ int proc_watchdog_thresh(struct ctl_table *table, int write,
                set_sample_period();
        }
 out:
-       mutex_unlock(&watchdog_proc_mutex);
+       mutex_unlock(&watchdog_mutex);
        cpu_hotplug_enable();
        return err;
 }
@@ -834,7 +833,7 @@ int proc_watchdog_cpumask(struct ctl_table *table, int write,
        int err;
 
        cpu_hotplug_disable();
-       mutex_lock(&watchdog_proc_mutex);
+       mutex_lock(&watchdog_mutex);
 
        err = proc_do_large_bitmap(table, write, buffer, lenp, ppos);
        if (!err && write) {
@@ -855,7 +854,7 @@ int proc_watchdog_cpumask(struct ctl_table *table, int write,
                watchdog_nmi_reconfigure();
        }
 
-       mutex_unlock(&watchdog_proc_mutex);
+       mutex_unlock(&watchdog_mutex);
        cpu_hotplug_enable();
        return err;
 }