linux-kernel - [PATCH] dma-buf: add support for compat ioctl

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Date:   Tue, 21 Feb 2017 14:21:01 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH] dma-buf: add support for compat ioctl

Add compat ioctl support to dma-buf. This lets one to use DMA_BUF_IOCTL_SYNC
ioctl from 32bit application on 64bit kernel. Data structures for both 32
and 64bit modes are same, so there is no need for additional translation
layer.

Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
 drivers/dma-buf/dma-buf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 718f832a5c71..0007b792827b 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -325,6 +325,9 @@ static long dma_buf_ioctl(struct file *file,
 	.llseek		= dma_buf_llseek,
 	.poll		= dma_buf_poll,
 	.unlocked_ioctl	= dma_buf_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= dma_buf_ioctl,
+#endif
 };
 
 /*
-- 
1.9.1