Re: [JANITOR PROPOSAL] Switch ioctl functions to ->unlocked_ioctl

Alasdair G Kergon
2008-01-09T22:40:43Z

On Wed, Jan 09, 2008 at 02:12:40PM -0600, Matt Mackall wrote:
> You'll need to change the prototype, the unlocked version doesn't take
> an inode. And you'll need to make sure that nothing in the function uses
> the inode, which I think Andi forgot to mention.

This old chestnut again. Perhaps we could have inode passed to unlocked_ioctl?
I never understood why it wasn't there in the first place if the plan was for
.unlocked_ioctl to supercede .ioctl whenever possible.

Device-mapper for example in dm_blk_ioctl(), has no need for BKL so drops it
immediately, but it does need the inode parameter, so it is unable to switch as
things stand.

Alasdair
--
agk@redhat.com