Re: [PATCH 01/15] dm: support ioctls on mapped devices

[Christoph Hellwig]

On Thu, Jun 22, 2006 at 08:49:07PM -0700, Andrew Morton wrote:
> My head is spinning in a twisty maze of ioctls.  What _should_ we call? 
> file_operations.foo_ioctl() or block_device_operations.foo_ioctl() or
> blkdev_ioctl()?

Neither.  The only valid way to perform ioctls on blockdevices from
kernelspace is ioctl_by_bdev.

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