linux-kernel - [PATCH v11 1/3] tty: hvc: use correct dma alignment size

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Message-Id: <20211015024658.1353987-2-xianting.tian@linux.alibaba.com>
Date:   Fri, 15 Oct 2021 10:46:56 +0800
From:   Xianting Tian <xianting.tian@...ux.alibaba.com>
To:     gregkh@...uxfoundation.org, jirislaby@...nel.org, amit@...nel.org,
        arnd@...db.de, osandov@...com
Cc:     shile.zhang@...ux.alibaba.com, linuxppc-dev@...ts.ozlabs.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        Xianting Tian <xianting.tian@...ux.alibaba.com>
Subject: [PATCH v11 1/3] tty: hvc: use correct dma alignment size

Use L1_CACHE_BYTES as the dma alignment size, use 'sizeof(long)' as
dma alignment is wrong.

Signed-off-by: Xianting Tian <xianting.tian@...ux.alibaba.com>
Signed-off-by: Shile Zhang <shile.zhang@...ux.alibaba.com>
---
 drivers/tty/hvc/hvc_console.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 5bb8c4e44..5957ab728 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -49,7 +49,7 @@
 #define N_OUTBUF	16
 #define N_INBUF		16
 
-#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
+#define __ALIGNED__ __attribute__((__aligned__(L1_CACHE_BYTES)))
 
 static struct tty_driver *hvc_driver;
 static struct task_struct *hvc_task;
-- 
2.17.1