linux-kernel - [PATCH v8 2/3] tpm_crb_ffa:Introduce memzero macro to replace memset

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Message-ID: <20250626184521.1079507-3-prachotan.bathi@arm.com>
Date: Thu, 26 Jun 2025 13:45:20 -0500
From: Prachotan Bathi <prachotan.bathi@....com>
To: Peter Huewe <peterhuewe@....de>,
	Jarkko Sakkinen <jarkko@...nel.org>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Stuart Yoder <stuart.yoder@....com>
Cc: linux-integrity@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prachotan Bathi <prachotan.bathi@....com>
Subject: [PATCH v8 2/3] tpm_crb_ffa:Introduce memzero macro to replace memset

Add a memzero macro to simplify and standardize zeroing
FF-A data args, replacing direct uses of memset for
improved readability and maintainability.

Signed-off-by: Prachotan Bathi <prachotan.bathi@....com>
---
 drivers/char/tpm/tpm_crb_ffa.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
index 089d1e54bb46..397cc3b0a478 100644
--- a/drivers/char/tpm/tpm_crb_ffa.c
+++ b/drivers/char/tpm/tpm_crb_ffa.c
@@ -12,6 +12,8 @@
 #include <linux/arm_ffa.h>
 #include "tpm_crb_ffa.h"
 
+#define memzero(s, n) memset((s), 0, (n))
+
 /* TPM service function status codes */
 #define CRB_FFA_OK			0x05000001
 #define CRB_FFA_OK_RESULTS_RETURNED	0x05000002
@@ -192,7 +194,7 @@ static int __tpm_crb_ffa_send_receive(unsigned long func_id,
 	msg_ops = tpm_crb_ffa->ffa_dev->ops->msg_ops;
 
 	if (ffa_partition_supports_direct_req2_recv(tpm_crb_ffa->ffa_dev)) {
-		memset(&tpm_crb_ffa->direct_msg_data2, 0x00,
+		memzero(&tpm_crb_ffa->direct_msg_data2,
 		       sizeof(struct ffa_send_direct_data2));
 
 		tpm_crb_ffa->direct_msg_data2.data[0] = func_id;
@@ -205,7 +207,7 @@ static int __tpm_crb_ffa_send_receive(unsigned long func_id,
 		if (!ret)
 			ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data2.data[0]);
 	} else {
-		memset(&tpm_crb_ffa->direct_msg_data, 0x00,
+		memzero(&tpm_crb_ffa->direct_msg_data,
 		       sizeof(struct ffa_send_direct_data));
 
 		tpm_crb_ffa->direct_msg_data.data1 = func_id;
-- 
2.43.0