linux-kernel - [PATCH v3 05/22] compat_ioctl: ubd, aoe: use blkdev_compat_ptr

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Message-Id: <20200102145552.1853992-6-arnd@arndb.de>
Date:   Thu,  2 Jan 2020 15:55:23 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Justin Sanders <justin@...aid.com>,
        Jens Axboe <axboe@...nel.dk>,
        Daniel Walter <dwalter@...gle.com>,
        Alex Dewar <alex.dewar@....co.uk>,
        linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: [PATCH v3 05/22] compat_ioctl: ubd, aoe: use blkdev_compat_ptr_ioctl

These drivers implement the HDIO_GET_IDENTITY and CDROMVOLREAD ioctl
commands, which are compatible between 32-bit and 64-bit user space and
traditionally handled by compat_blkdev_driver_ioctl().

As a prerequisite to removing that function, make both drivers use
blkdev_compat_ptr_ioctl() as their .compat_ioctl callback.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/um/drivers/ubd_kern.c | 1 +
 drivers/block/aoe/aoeblk.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 6627d7c30f37..582eb5b1f09b 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -113,6 +113,7 @@ static const struct block_device_operations ubd_blops = {
         .open		= ubd_open,
         .release	= ubd_release,
         .ioctl		= ubd_ioctl,
+        .compat_ioctl	= blkdev_compat_ptr_ioctl,
 	.getgeo		= ubd_getgeo,
 };
 
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index bd19f8af950b..7b32fb673375 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -329,6 +329,7 @@ static const struct block_device_operations aoe_bdops = {
 	.open = aoeblk_open,
 	.release = aoeblk_release,
 	.ioctl = aoeblk_ioctl,
+	.compat_ioctl = blkdev_compat_ptr_ioctl,
 	.getgeo = aoeblk_getgeo,
 	.owner = THIS_MODULE,
 };
-- 
2.20.0