linux-kernel - [PATCH v2 2/2] scsi: scsi_debug: Use vcalloc to simplify code

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Message-Id: <20250805022637.329212-3-rongqianfeng@vivo.com>
Date: Tue,  5 Aug 2025 10:26:36 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: bvanassche@....org,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-scsi@...r.kernel.org (open list:SCSI SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list)
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH v2 2/2] scsi: scsi_debug: Use vcalloc to simplify code

Use vcalloc() instead of vmalloc() followed by bitmap_zero() to simplify
the functions sdebug_add_store().

Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
 drivers/scsi/scsi_debug.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 353cb60e1abe..14e2d6e94dd2 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -8805,8 +8805,8 @@ static int sdebug_add_store(void)
 	/* Logical Block Provisioning */
 	if (scsi_debug_lbp()) {
 		map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
-		sip->map_storep = vmalloc(array_size(sizeof(long),
-						     BITS_TO_LONGS(map_size)));
+		sip->map_storep = vcalloc(BITS_TO_LONGS(map_size),
+					  sizeof(long));
 
 		pr_info("%lu provisioning blocks\n", map_size);
 
@@ -8815,8 +8815,6 @@ static int sdebug_add_store(void)
 			goto err;
 		}
 
-		bitmap_zero(sip->map_storep, map_size);
-
 		/* Map first 1KB for partition table */
 		if (sdebug_num_parts)
 			map_region(sip, 0, 2);
-- 
2.34.1