linux-kernel - [PATCH v2] scsi: fnic: Use vzalloc() instead of vmalloc() and memset(0)

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Message-ID: <20241008095152.1831-2-thorsten.blum@linux.dev>
Date: Tue,  8 Oct 2024 11:51:53 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Satish Kharat <satishkh@...co.com>,
	Sesidhar Baddela <sebaddel@...co.com>,
	Karan Tilak Kumar <kartilak@...co.com>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	Johannes Thumshirn <johannes.thumshirn@....com>,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] scsi: fnic: Use vzalloc() instead of vmalloc() and memset(0)

Use vzalloc() instead of vmalloc() followed by memset(0) to simplify the
functions fnic_trace_buf_init() and fnic_fc_trace_init().

Remove unnecessary unsigned long cast.

Compile-tested only.

Cc: Johannes Thumshirn <johannes.thumshirn@....com>
Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
Changes in v2:
- Remove unsigned long cast as suggested by Johannes Thumshirn
- Link to v1: https://lore.kernel.org/linux-kernel/20241007115840.2239-6-thorsten.blum@linux.dev/
---
 drivers/scsi/fnic/fnic_trace.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c
index aaa4ea02fb7c..c2413e0e4eaa 100644
--- a/drivers/scsi/fnic/fnic_trace.c
+++ b/drivers/scsi/fnic/fnic_trace.c
@@ -485,7 +485,7 @@ int fnic_trace_buf_init(void)
 	}
 
 	fnic_trace_entries.page_offset =
-		vmalloc(array_size(fnic_max_trace_entries,
+		vzalloc(array_size(fnic_max_trace_entries,
 				   sizeof(unsigned long)));
 	if (!fnic_trace_entries.page_offset) {
 		printk(KERN_ERR PFX "Failed to allocate memory for"
@@ -497,8 +497,6 @@ int fnic_trace_buf_init(void)
 		err = -ENOMEM;
 		goto err_fnic_trace_buf_init;
 	}
-	memset((void *)fnic_trace_entries.page_offset, 0,
-		  (fnic_max_trace_entries * sizeof(unsigned long)));
 	fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
 	fnic_buf_head = fnic_trace_buf_p;
 
@@ -559,8 +557,7 @@ int fnic_fc_trace_init(void)
 	fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
 				FC_TRC_SIZE_BYTES;
 	fnic_fc_ctlr_trace_buf_p =
-		(unsigned long)vmalloc(array_size(PAGE_SIZE,
-						  fnic_fc_trace_max_pages));
+		vzalloc(array_size(PAGE_SIZE, fnic_fc_trace_max_pages));
 	if (!fnic_fc_ctlr_trace_buf_p) {
 		pr_err("fnic: Failed to allocate memory for "
 		       "FC Control Trace Buf\n");
@@ -568,12 +565,9 @@ int fnic_fc_trace_init(void)
 		goto err_fnic_fc_ctlr_trace_buf_init;
 	}
 
-	memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
-			fnic_fc_trace_max_pages * PAGE_SIZE);
-
 	/* Allocate memory for page offset */
 	fc_trace_entries.page_offset =
-		vmalloc(array_size(fc_trace_max_entries,
+		vzalloc(array_size(fc_trace_max_entries,
 				   sizeof(unsigned long)));
 	if (!fc_trace_entries.page_offset) {
 		pr_err("fnic:Failed to allocate memory for page_offset\n");
@@ -585,8 +579,6 @@ int fnic_fc_trace_init(void)
 		err = -ENOMEM;
 		goto err_fnic_fc_ctlr_trace_buf_init;
 	}
-	memset((void *)fc_trace_entries.page_offset, 0,
-	       (fc_trace_max_entries * sizeof(unsigned long)));
 
 	fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
 	fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
-- 
2.46.2