linux-kernel - [PATCH] regulator: fixed-helper: Save a few bytes of memory when registering a 'nfc

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Date: Sat, 20 Jan 2024 12:03:26 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] regulator: fixed-helper: Save a few bytes of memory when registering a 'nfc_llc' engine

regulator_register_always_on() calls pass a string literal as the 'name'
parameter.

So kstrdup_const() can be used instead of kfree() to avoid a memory
allocation in such cases.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/regulator/fixed-helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c
index 0eb2442456f0..2d5a42b2b3d8 100644
--- a/drivers/regulator/fixed-helper.c
+++ b/drivers/regulator/fixed-helper.c
@@ -15,7 +15,7 @@ static void regulator_fixed_release(struct device *dev)
 {
 	struct fixed_regulator_data *data = container_of(dev,
 			struct fixed_regulator_data, pdev.dev);
-	kfree(data->cfg.supply_name);
+	kfree_const(data->cfg.supply_name);
 	kfree(data);
 }
 
@@ -36,7 +36,7 @@ struct platform_device *regulator_register_always_on(int id, const char *name,
 	if (!data)
 		return NULL;
 
-	data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
+	data->cfg.supply_name = kstrdup_const(name, GFP_KERNEL);
 	if (!data->cfg.supply_name) {
 		kfree(data);
 		return NULL;
-- 
2.43.0