From: Qiuyu Zhang <qiuyu.zhang@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: strange about copy_from_user
Date: Fri, 9 Jul 2004 14:38:26 -0700 [thread overview]
Message-ID: <c26fd828040709143843b3143f@mail.gmail.com> (raw)
Hi all,
I am working on writing a module driver.
I am trying to use API copy_from_user to copy a bunch of memory from
user space to kernel space. I write a ioctl function to register the
pointer of the memory to kernel. And in the ioctl function I can use
copy_from_user to get the correct data, but the strange thing is that
when I use copy_from_user in other kernel function such as
dev_hard_xmit function , I cannot
get the correct result. I don't konw what the reason is . Thx.
next reply other threads:[~2004-07-09 21:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 21:38 Qiuyu Zhang [this message]
2004-07-09 21:57 ` strange about copy_from_user Richard B. Johnson
2004-07-09 23:11 ` Qiuyu Zhang
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=c26fd828040709143843b3143f@mail.gmail.com \
--to=qiuyu.zhang@gmail.com \
--cc=linux-kernel@vger.kernel.org \
/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