linux-kernel - [PATCH] gpio: sim: replace memmove() + strstrip() with skip

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Date:   Sat, 12 Aug 2023 20:57:48 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Kent Gibson <warthog618@...il.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] gpio: sim: replace memmove() + strstrip() with skip_spaces() + strim()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Turns out we can avoid the memmove() by using skip_spaces() and strim().
We did that in gpio-consumer, let's do it in gpio-sim.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-sim.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index bb8fcf2a794c..106a73263f49 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -633,16 +633,15 @@ static bool gpio_sim_device_is_live_unlocked(struct gpio_sim_device *dev)
 
 static char *gpio_sim_strdup_trimmed(const char *str, size_t count)
 {
-	char *dup, *trimmed;
+	char *trimmed;
 
-	dup = kstrndup(str, count, GFP_KERNEL);
-	if (!dup)
+	trimmed = kstrndup(skip_spaces(str), count, GFP_KERNEL);
+	if (!trimmed)
 		return NULL;
 
-	trimmed = strstrip(dup);
-	memmove(dup, trimmed, strlen(trimmed) + 1);
+	strim(trimmed);
 
-	return dup;
+	return trimmed;
 }
 
 static ssize_t gpio_sim_device_config_dev_name_show(struct config_item *item,
-- 
2.39.2