From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Thu, 26 May 2022 11:51:19 +0000 (+0530)
Subject: cpufreq: Optimize cpufreq_show_cpus()
X-Git-Tag: v6.0-rc1~184^2~5^2~1^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=336e51283ae376835b30b9edfcddd8e7b7615798;p=thirdparty%2Fkernel%2Flinux.git

cpufreq: Optimize cpufreq_show_cpus()

Instead of specially adding a space for each CPU, except the first one,
lets add space for each of them and remove it at the end.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2cad427741647..e24aa5d4bca54 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -843,12 +843,14 @@ ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf)
 	unsigned int cpu;
 
 	for_each_cpu(cpu, mask) {
-		if (i)
-			i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " ");
-		i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu);
+		i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u ", cpu);
 		if (i >= (PAGE_SIZE - 5))
 			break;
 	}
+
+	/* Remove the extra space at the end */
+	i--;
+
 	i += sprintf(&buf[i], "\n");
 	return i;
 }