From: Chen Zhou <chenzhou10@huawei.com>
Date: Fri, 8 May 2020 11:59:06 +0000 (+0800)
Subject: nvmet: replace kstrndup() with kmemdup_nul()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=09bb8986c99cd3395e96635df9e712f5da45bc07;p=uclinux-h8%2Flinux.git

nvmet: replace kstrndup() with kmemdup_nul()

It is more efficient to use kmemdup_nul() if the size is known exactly.

The doc in kernel:
"Note: Use kmemdup_nul() instead if the size is known exactly."

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index ae8fb4489a10..19bd5e1c681c 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -324,7 +324,7 @@ static ssize_t nvmet_ns_device_path_store(struct config_item *item,
 
 	kfree(ns->device_path);
 	ret = -ENOMEM;
-	ns->device_path = kstrndup(page, len, GFP_KERNEL);
+	ns->device_path = kmemdup_nul(page, len, GFP_KERNEL);
 	if (!ns->device_path)
 		goto out_unlock;
 
@@ -960,7 +960,7 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
 			return -EINVAL;
 	}
 
-	new_model_number = kstrndup(page, len, GFP_KERNEL);
+	new_model_number = kmemdup_nul(page, len, GFP_KERNEL);
 	if (!new_model_number)
 		return -ENOMEM;