linux-kernel - [PATCH v2 2/2] nfc: hci: Save a few bytes of memory when registering a 'nfc

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Date: Sat,  3 Feb 2024 08:51:04 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: krzysztof.kozlowski@...aro.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2 2/2] nfc: hci: Save a few bytes of memory when registering a 'nfc_llc' engine

nfc_llc_register() 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>
---
 net/nfc/hci/llc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
index 480c17f372a5..ba91284f4086 100644
--- a/net/nfc/hci/llc.c
+++ b/net/nfc/hci/llc.c
@@ -33,7 +33,7 @@ int __init nfc_llc_init(void)
 static void nfc_llc_del_engine(struct nfc_llc_engine *llc_engine)
 {
 	list_del(&llc_engine->entry);
-	kfree(llc_engine->name);
+	kfree_const(llc_engine->name);
 	kfree(llc_engine);
 }
 
@@ -53,7 +53,7 @@ int nfc_llc_register(const char *name, const struct nfc_llc_ops *ops)
 	if (llc_engine == NULL)
 		return -ENOMEM;
 
-	llc_engine->name = kstrdup(name, GFP_KERNEL);
+	llc_engine->name = kstrdup_const(name, GFP_KERNEL);
 	if (llc_engine->name == NULL) {
 		kfree(llc_engine);
 		return -ENOMEM;
-- 
2.43.0