linux-kernel - [PATCH v2 03/10] PM: sleep: stats: Use unsigned int for success and failure counters

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Date: Mon, 29 Jan 2024 17:13:14 +0100
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Ulf Hansson <ulf.hansson@...aro.org>, Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>
Subject: [PATCH v2 03/10] PM: sleep: stats: Use unsigned int for success and failure counters

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Change the type of the "success" and "fail" fields in struct
suspend_stats to unsigned int, because they cannot be negative.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

v1 -> v2: New patch.

---
 include/linux/suspend.h |    4 ++--
 kernel/power/main.c     |    6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

Index: linux-pm/include/linux/suspend.h
===================================================================
--- linux-pm.orig/include/linux/suspend.h
+++ linux-pm/include/linux/suspend.h
@@ -56,8 +56,8 @@ enum suspend_stat_step {
 
 struct suspend_stats {
 	unsigned int step_failures[SUSPEND_NR_STEPS];
-	int	success;
-	int	fail;
+	unsigned int success;
+	unsigned int fail;
 #define	REC_FAILED_NUM	2
 	int	last_failed_dev;
 	char	failed_devs[REC_FAILED_NUM][40];
Index: linux-pm/kernel/power/main.c
===================================================================
--- linux-pm.orig/kernel/power/main.c
+++ linux-pm/kernel/power/main.c
@@ -339,8 +339,8 @@ static ssize_t _name##_show(struct kobje
 }								\
 static struct kobj_attribute _name = __ATTR_RO(_name)
 
-suspend_attr(success, "%d\n");
-suspend_attr(fail, "%d\n");
+suspend_attr(success, "%u\n");
+suspend_attr(fail, "%u\n");
 suspend_attr(last_hw_sleep, "%llu\n");
 suspend_attr(total_hw_sleep, "%llu\n");
 suspend_attr(max_hw_sleep, "%llu\n");
@@ -458,7 +458,7 @@ static int suspend_stats_show(struct seq
 	last_step = suspend_stats.last_failed_step + REC_FAILED_NUM - 1;
 	last_step %= REC_FAILED_NUM;
 
-	seq_printf(s, "success: %d\nfail: %d\n",
+	seq_printf(s, "success: %u\nfail: %u\n",
 		   suspend_stats.success, suspend_stats.fail);
 
 	for (step = SUSPEND_FREEZE; step <= SUSPEND_NR_STEPS; step++)