Re: [PATCH 00/23] add register_chrdev_ids() to char_dev.c, API
From: Greg KH
Date: Thu May 19 2011 - 19:04:54 EST
On Thu, May 19, 2011 at 03:33:03PM -0600, Jim Cromie wrote:
> over on kernelnewbies, gregkh said:
> The chardev stuff is a mess, I keep meaning for years to clean it
> up. Any proposals on a sane interface for this stuff is greatly
> this is a 1st step.
> register_chrdev_ids() replaces and deprecates register_chrdev_region()
> and alloc_chrdev_region() with a single function that works for both
> dynamic and static major numbers.
> Like alloc_chrdev_region(), 1st arg is a dev_t*, but its an in/out
> parameter, and expects both major and minor to be preset, and thus the
> separate minor arg is dropped. If major == 0, a dynamic major is
> reserved, saved into 1st arg, and thus available to caller afterwards.
> [PATCH 01/23] add register_chrdev_ids() to char_dev.c, API
> [PATCH 02/23] reimplement alloc_chrdev_region with
> [PATCH 03/23] use register_chrdev_ids to replace
> [PATCH 04/23] use register_chrdev_ids in drivers/tty/
> [PATCH 05/23] use register_chrdev_ids in drivers/infiniband/
> [PATCH 06/23] use register_chrdev_ids in drivers/media/
> [PATCH 07/23] use register_chrdev_ids in drivers/s390/
> [PATCH 08/23] use register_chrdev_ids in drivers/scsi/
> [PATCH 09/23] use register_chrdev_ids in drivers/staging/
> Ive held back the rest, no point in spamming.
It's a nice first step, but that's the easy part, what is your 2nd
through 4th one going to be? :)
I'd also like to sanatize the function namespace a bit as well, how
about chrdev_register_ids() instead?
Ideally, we could drop down to a single register/unregister pair of
functions, that are easy to use and understand. Do you think you can
get there with this intermediate step or do you want to step back and
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