Re: [PATCH] vt: add an event interface

From: Alan Cox
Date: Fri Jul 03 2009 - 05:07:25 EST


> Just a side-note, please run new patches through
> scripts/checkpatch.pl:
>
> total: 4 errors, 2 warnings, 0 checks, 294 lines checked

Given the code doesn't currently *work* yet but is a first draft its
hardly important and there are better uses of time than playing
checkpatch policeman.

> - the copy_from_user() in vt_event_wait_ioctl() could be shortened
> if we didnt pass in an unsigned long (which is pointless anyway).
> The cast to void __user * should be done in the ioctl
> demultiplexer vt_ioctl(), and the ioctl ugliness should not
> invade cleaner child functions such as vt_event_wait_ioctl().
>
> - same for vt_event_wait_ioctl() - it passes in a type damaged by
> ioctl's limitations. Such type limitations and ioctl demuxing
> artifacts should be kept local to vt_ioctl().

That had already occurred to me. The events should also become a mask so
you can wait for several at once. What I wanted to know was whether such
an interface actually meets Lennart's requirements.

Alan
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