Re: Access files from kernel

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Subject: Re: Access files from kernel
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 3 Oct 2012 13:32:06 -0700
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxxxxx>, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, Kay Sievers <kay@xxxxxxxx>, Lennart Poettering <lennart@xxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Kay Sievers <kay@xxxxxxxxxx>, Linux Media Mailing List <linux-media@xxxxxxxxxxxxxxx>, Michael Krufky <mkrufky@xxxxxxxxxxx>, Ivan Kalvachev <ikalvachev@xxxxxxxxx>
In-reply-to: <20121003194819.GA2490@shutemov.name>

On Wed, Oct 3, 2012 at 12:48 PM, Kirill A. Shutemov
<kirill@xxxxxxxxxxxxx> wrote:
>
> AFAIK, accessing files on filesystem form kernel directly was no-go for a
> long time. What's the new rule here?

Oh, we've *always* accessed files from the kernel.

What we don't want is random drivers doing so directly and without a
good abstraction layer, because that just ends up being a total
nightmare.

Still, they've done that too. Ugh. Too many drivers having random
hacks like that.

            Linus
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References:
- Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Mauro Carvalho Chehab
- Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Greg KH
- Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Mauro Carvalho Chehab
- udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Mauro Carvalho Chehab
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Linus Torvalds
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Greg KH
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Greg KH
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Linus Torvalds
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Mauro Carvalho Chehab
- Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware_nowait()
  - From: Linus Torvalds
- Access files from kernel
  - From: Kirill A. Shutemov

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