From: David Brownell <david-b@pacbell.net>
To: Vitaly Wool <vwool@ru.mvista.com>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org,
spi-devel-general@lists.sourceforge.net
Subject: Re: [spi-devel-general] [patch 2.6.15-rc5-mm2] SPI, priority inversion tweak
Date: Tue, 13 Dec 2005 14:21:09 -0800 [thread overview]
Message-ID: <200512131421.10231.david-b@pacbell.net> (raw)
In-Reply-To: <439F4206.2040406@ru.mvista.com>
On Tuesday 13 December 2005 1:49 pm, Vitaly Wool wrote:
> So you're turning this to be unsafe if the buffer is in use, right? Funny...
I have no idea what you mean by that comment. The parameters to that
function have always been documented as "will copy", and the two branches
(busy/not) differ only in _which_ buffer they use from the heap (the
fast pre-allocated one, or a freshly allocated scratch buffer). Heap
buffers are by definition DMA-safe.
- Dave
> David Brownell wrote:
>
> >This is an updated version of the patch from Mark Underwood, handling
> >the no-memory case better and using SLAB_KERNEL not SLAB_ATOMIC.
> >
>
next prev parent reply other threads:[~2005-12-13 22:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-13 18:28 [patch 2.6.15-rc5-mm2] SPI, priority inversion tweak David Brownell
2005-12-13 21:49 ` [spi-devel-general] " Vitaly Wool
2005-12-13 22:21 ` David Brownell [this message]
2005-12-14 6:43 ` Vitaly Wool
2005-12-14 6:47 ` Vitaly Wool
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200512131421.10231.david-b@pacbell.net \
--to=david-b@pacbell.net \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=spi-devel-general@lists.sourceforge.net \
--cc=vwool@ru.mvista.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.