[PATCH v4 8/8] watchdog: Replace strncmp with str_has_prefix

[Chuhong Yuan]

strncmp(str, const, len) is error-prone because len
is easy to have typo.
The example is the hard-coded len has counting error
or sizeof(const) forgets - 1.
So we prefer using newly introduced str_has_prefix()
to substitute such strncmp to make code better.

Signed-off-by: Chuhong Yuan <hslester96@xxxxxxxxx>
---
 kernel/watchdog.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 7f9e7b9306fe..ac7a4b5f856e 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -70,13 +70,13 @@ void __init hardlockup_detector_disable(void)
 
 static int __init hardlockup_panic_setup(char *str)
 {
-	if (!strncmp(str, "panic", 5))
+	if (str_has_prefix(str, "panic"))
 		hardlockup_panic = 1;
-	else if (!strncmp(str, "nopanic", 7))
+	else if (str_has_prefix(str, "nopanic"))
 		hardlockup_panic = 0;
-	else if (!strncmp(str, "0", 1))
+	else if (str_has_prefix(str, "0"))
 		nmi_watchdog_user_enabled = 0;
-	else if (!strncmp(str, "1", 1))
+	else if (str_has_prefix(str, "1"))
 		nmi_watchdog_user_enabled = 1;
 	return 1;
 }
-- 
2.20.1