[PATCH] power: cpupower: utils: Optimize print_online_cpus and print_offline_cpus function

[Li kunyu]

1. Remove the initialization assignment of variables, and they will be
assigned first.
2. Remove the mandatory conversion of returned value of malloc function,
which returns void* type.

Signed-off-by: Li kunyu <kunyu@xxxxxxxxxxxx>
---
 tools/power/cpupower/utils/helpers/misc.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 9547b29254a7..36dbd0562240 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -134,11 +134,11 @@ void get_cpustate(void)
  */
 void print_online_cpus(void)
 {
-	int str_len = 0;
-	char *online_cpus_str = NULL;
+	int str_len;
+	char *online_cpus_str;
 
 	str_len = online_cpus->size * 5;
-	online_cpus_str = (void *)malloc(sizeof(char) * str_len);
+	online_cpus_str = malloc(sizeof(char) * str_len);
 
 	if (!bitmask_isallclear(online_cpus)) {
 		bitmask_displaylist(online_cpus_str, str_len, online_cpus);
@@ -152,11 +152,11 @@ void print_online_cpus(void)
  */
 void print_offline_cpus(void)
 {
-	int str_len = 0;
-	char *offline_cpus_str = NULL;
+	int str_len;
+	char *offline_cpus_str;
 
 	str_len = offline_cpus->size * 5;
-	offline_cpus_str = (void *)malloc(sizeof(char) * str_len);
+	offline_cpus_str = malloc(sizeof(char) * str_len);
 
 	if (!bitmask_isallclear(offline_cpus)) {
 		bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);
-- 
2.18.2