From: Matthew Wilcox <willy@debian.org>
To: Grant Grundler <grundler@dsl2.external.hp.com>
Cc: "Rafael E. Herrera" <raffo@neuronet.pitt.edu>,
parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] EISA 100/10 add-on card causes kernel BUG
Date: Sat, 16 Mar 2002 21:39:38 +0000 [thread overview]
Message-ID: <20020316213938.B2179@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <20020316184231.482C6482C@dsl2.external.hp.com>; from grundler@dsl2.external.hp.com on Sat, Mar 16, 2002 at 11:42:31AM -0700
On Sat, Mar 16, 2002 at 11:42:31AM -0700, Grant Grundler wrote:
> works on x86 arch. The right way to access user space data
> is via copy_from_user() or write asm code that explicitly
> references Space Registers (eg sr3).
Let me just explicitly discourage doing this (or, if you must, document
it in Documentation/parisc/registers). Use of sr3 to access userspace
is subject to change and it'd be nice not to have to check every driver
for use. It's bad enough that sba & ccio use sr1, but at least we found
those :-)
I cant imagine a good reason for using sr3. copy_{to,from}_user are
portable and obvious.
--
Revolutions do not require corporate support.
next prev parent reply other threads:[~2002-03-16 21:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-16 5:50 [parisc-linux] EISA 100/10 add-on card causes kernel BUG Rafael E. Herrera
2002-03-16 18:42 ` Grant Grundler
2002-03-16 21:39 ` Matthew Wilcox [this message]
2002-03-17 5:38 ` Grant Grundler
2002-03-17 13:43 ` Matthew Wilcox
2002-03-17 16:59 ` Grant Grundler
2002-03-22 3:16 ` [parisc-linux] EISA 100/10 add-on card on a 715/80 Rafael E. Herrera
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=20020316213938.B2179@parcelfarce.linux.theplanet.co.uk \
--to=willy@debian.org \
--cc=grundler@dsl2.external.hp.com \
--cc=parisc-linux@lists.parisc-linux.org \
--cc=raffo@neuronet.pitt.edu \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox