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

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Date:   Tue, 2 Feb 2021 15:43:29 +0800
From:   Hui Su <sh_def@....com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Potapenko <glider@...gle.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Vijayanand Jitta <vjitta@...eaurora.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Yogesh Lal <ylal@...eaurora.org>, linux-kernel@...r.kernel.org
Cc:     sh_def@....com
Subject: [PATCH] lib/stackdepot.c: fix the compile warning

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_def@....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