linux-kernel - [PATCH] ACPI: replace strlen("string") with sizeof("string") -1

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Date:	Thu, 26 Jul 2012 21:39:38 -0400
From:	Len Brown <lenb@...nel.org>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	linux-acpi@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	Pavel Vasilyev <pavel@...linux.ru>,
	linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH] ACPI: replace strlen("string") with sizeof("string") -1

...both give the number of chars in the string
without the '\0', as strncmp() wants,
but sizeof() is compile-time.

Reported-by: Alan Stern <stern@...land.harvard.edu>
Cc: Pavel Vasilyev <pavel@...linux.ru>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/acpi/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 240a244..7c3f98b 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -173,7 +173,7 @@ static int param_set_trace_state(const char *val,
struct kernel_param *kp)
 {
 	int result = 0;

-	if (!strncmp(val, "enable", strlen("enable"))) {
+	if (!strncmp(val, "enable", sizeof("enable") - 1)) {
 		result = acpi_debug_trace(trace_method_name, trace_debug_level,
 					  trace_debug_layer, 0);
 		if (result)
@@ -181,7 +181,7 @@ static int param_set_trace_state(const char *val,
struct kernel_param *kp)
 		goto exit;
 	}

-	if (!strncmp(val, "disable", strlen("disable"))) {
+	if (!strncmp(val, "disable", sizeof("disable") - 1)) {
 		int name = 0;
 		result = acpi_debug_trace((char *)&name, trace_debug_level,
 					  trace_debug_layer, 0);
-- 
1.7.12.rc0

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