linux-kernel - [PATCH] loop: Add LOOP_SET_DIRECT

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Date:   Tue,  6 Aug 2019 23:05:24 +0100
From:   Alessio Balsini <balsini@...roid.com>
To:     linux-block@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, axboe@...nel.dk, dvander@...il.com,
        elsk@...gle.com, gregkh@...uxfoundation.org,
        kernel-team@...roid.com
Subject: [PATCH] loop: Add LOOP_SET_DIRECT_IO in compat ioctl

Export LOOP_SET_DIRECT_IO as additional lo_compat_ioctl.
The input argument for this ioctl is a single long, in the end converted
to a 1-bit boolean. Compatibility is then preserved.

Cc: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Alessio Balsini <balsini@...roid.com>
---
 drivers/block/loop.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3036883fc9f8..a7461f482467 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1755,6 +1755,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
 	case LOOP_SET_FD:
 	case LOOP_CHANGE_FD:
 	case LOOP_SET_BLOCK_SIZE:
+	case LOOP_SET_DIRECT_IO:
 		err = lo_ioctl(bdev, mode, cmd, arg);
 		break;
 	default:
-- 
2.22.0.770.g0f2c4a37fd-goog