regulator: qcom: smd: remove duplicate Makefile and Kconfig entries for REGULATOR_QCO...

[karo-tx-linux.git] / kernel / watchdog.c

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 18f34cf75f741e2a63db6dc6c522dfa2e03d1a54..198137b1cadc6a8438cf105270c0229ccc4149e5 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -907,6 +907,9 @@ static int proc_watchdog_common(int which, struct ctl_table *table, int write,
                 * both lockup detectors are disabled if proc_watchdog_update()
                 * returns an error.
                 */
+               if (old == new)
+                       goto out;
+
                err = proc_watchdog_update();
        }
 out:
@@ -951,7 +954,7 @@ int proc_soft_watchdog(struct ctl_table *table, int write,
 int proc_watchdog_thresh(struct ctl_table *table, int write,
                         void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-       int err, old;
+       int err, old, new;
 
        get_online_cpus();
        mutex_lock(&watchdog_proc_mutex);
@@ -971,6 +974,10 @@ int proc_watchdog_thresh(struct ctl_table *table, int write,
        /*
         * Update the sample period. Restore on failure.
         */
+       new = ACCESS_ONCE(watchdog_thresh);
+       if (old == new)
+               goto out;
+
        set_sample_period();
        err = proc_watchdog_update();
        if (err) {