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loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl

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This change adds LOOP_SET_BLOCK_SIZE as one of the supported ioctls
in lo_compat_ioctl. It only takes an unsigned long argument, and
in practice a 32-bit value works fine.

Reviewed-by: Omar Sandoval <[email protected]>
Signed-off-by: Evan Green <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Evan Green 2018-07-02 16:03:46 -07:00 • committed by Jens Axboe
commit 9fea4b3952
1 changed files with 1 additions and 0 deletions
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1
drivers/block/loop.c
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@ -1612,6 +1612,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
arg = (unsigned long) compat_ptr(arg);
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
case LOOP_SET_BLOCK_SIZE:
err = lo_ioctl(bdev, mode, cmd, arg);
break;
default: