drivers/base/cpu: Simplify s*nprintf() usages

Use the simpler sprintf() instead of snprintf() or scnprintf() in a
single-shot sysfs output callbacks where you are very sure that it
won't go over PAGE_SIZE buffer limit.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200311080207.12046-3-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 67aaa052c7a20a15f696364330e6cfa14555128f..df19c002d747323bce1f6b0f057e8b698750edbd 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -231,8 +231,7 @@ static struct cpu_attr cpu_attrs[] = {
 static ssize_t print_cpus_kernel_max(struct device *dev,
                                     struct device_attribute *attr, char *buf)
 {
-       int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
-       return n;
+       return sprintf(buf, "%d\n", NR_CPUS - 1);
 }
 static DEVICE_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
 
@@ -272,7 +271,7 @@ static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
 static ssize_t print_cpus_isolated(struct device *dev,
                                  struct device_attribute *attr, char *buf)
 {
-       int n = 0, len = PAGE_SIZE-2;
+       int n;
        cpumask_var_t isolated;
 
        if (!alloc_cpumask_var(&isolated, GFP_KERNEL))
@@ -280,7 +279,7 @@ static ssize_t print_cpus_isolated(struct device *dev,
 
        cpumask_andnot(isolated, cpu_possible_mask,
                       housekeeping_cpumask(HK_FLAG_DOMAIN));
-       n = scnprintf(buf, len, "%*pbl\n", cpumask_pr_args(isolated));
+       n = sprintf(buf, "%*pbl\n", cpumask_pr_args(isolated));
 
        free_cpumask_var(isolated);
 
@@ -292,11 +291,7 @@ static DEVICE_ATTR(isolated, 0444, print_cpus_isolated, NULL);
 static ssize_t print_cpus_nohz_full(struct device *dev,
                                  struct device_attribute *attr, char *buf)
 {
-       int n = 0, len = PAGE_SIZE-2;
-
-       n = scnprintf(buf, len, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
-
-       return n;
+       return sprintf(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
 }
 static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL);
 #endif