linux-kernel - [PATCHv7 2/4] virtio_console: Use kmalloc instead of kzalloc

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Message-Id: <1350287856-5284-3-git-send-email-sjur.brandeland@stericsson.com>
Date:	Mon, 15 Oct 2012 09:57:34 +0200
From:	sjur.brandeland@...ricsson.com
To:	Amit Shah <amit.shah@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Ohad Ben-Cohen <ohad@...ery.com>, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, sjurbren@...il.com,
	Sjur Brændeland <sjur.brandeland@...ricsson.com>
Subject: [PATCHv7 2/4] virtio_console: Use kmalloc instead of kzalloc

From: Sjur Brændeland <sjur.brandeland@...ricsson.com>

Avoid the more cpu expensive kzalloc when allocating buffers.
Originally kzalloc was intended for isolating the guest from
the host by not sending random guest data to the host. But device
isolation is not yet in place so kzalloc is not really needed.

Signed-off-by: Sjur Brændeland <sjur.brandeland@...ricsson.com>
---
 drivers/char/virtio_console.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index c36b2f6..301d17e 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -349,7 +349,7 @@ static struct port_buffer *alloc_buf(size_t buf_size)
 	buf = kmalloc(sizeof(*buf), GFP_KERNEL);
 	if (!buf)
 		goto fail;
-	buf->buf = kzalloc(buf_size, GFP_KERNEL);
+	buf->buf = kmalloc(buf_size, GFP_KERNEL);
 	if (!buf->buf)
 		goto free_buf;
 	buf->len = 0;
-- 
1.7.5.4

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