[PATCH] lib/stackdepot.c: fix the compile warning

[Hui Su]

fix the compile warning introduced by commit b9779abb09a8 ("lib: stackdepot:
add support to disable stack depot")

../lib/stackdepot.c: In function ‘is_stack_depot_disabled’:
../lib/stackdepot.c:154:2: warning: ignoring return value of ‘kstrtobool’, 
declared with attribute warn_unused_result [-Wunused-result]
  154 |  kstrtobool(str, &stack_depot_disable);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hui Su <sh_...@163.com>
---
 lib/stackdepot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index cc21116512a7..acd13f574f97 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -151,7 +151,9 @@ static struct stack_record **stack_table;
 
 static int __init is_stack_depot_disabled(char *str)
 {
-       kstrtobool(str, &stack_depot_disable);
+       int no_warn;
+
+       no_warn = kstrtobool(str, &stack_depot_disable);
        if (stack_depot_disable) {
                pr_info("Stack Depot is disabled\n");
                stack_table = NULL;
-- 
2.25.1