From: Matthias Kaehlcke <mka@chromium.org>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
Mark Charlebois <charlebm@gmail.com>,
Behan Webster <behanw@converseincode.com>,
Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Grant Grundler <grundler@chromium.org>,
Michael Davidson <md@google.com>,
Greg Hackmann <ghackmann@google.com>,
Peter Foley <pefoley2@pefoley.com>
Subject: Re: [PATCH] fs: compat: Remove warning from COMPATIBLE_IOCTL
Date: Wed, 19 Apr 2017 11:14:12 -0700 [thread overview]
Message-ID: <20170419181412.GF128305@google.com> (raw)
In-Reply-To: <20170404180720.182336-1-mka@chromium.org>
El Tue, Apr 04, 2017 at 11:07:20AM -0700 Matthias Kaehlcke ha dit:
> From: Mark Charlebois <charlebm@gmail.com>
>
> cmd in COMPATIBLE_IOCTL is always a u32, so cast it so there isn't a
> warning about an overflow in XFORM.
>
> From: Mark Charlebois <charlebm@gmail.com>
> Signed-off-by: Mark Charlebois <charlebm@gmail.com>
> Signed-off-by: Behan Webster <behanw@converseincode.com>
> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
> ---
> Resending https://patchwork.kernel.org/patch/4961631/
>
> fs/compat_ioctl.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
> index 11d087b2b28e..6116d5275a3e 100644
> --- a/fs/compat_ioctl.c
> +++ b/fs/compat_ioctl.c
> @@ -833,7 +833,7 @@ static int compat_ioctl_preallocate(struct file *file,
> */
> #define XFORM(i) (((i) ^ ((i) << 27) ^ ((i) << 17)) & 0xffffffff)
>
> -#define COMPATIBLE_IOCTL(cmd) XFORM(cmd),
> +#define COMPATIBLE_IOCTL(cmd) XFORM((u32)cmd),
> /* ioctl should not be warned about even if it's not implemented.
> Valid reasons to use this:
> - It is implemented with ->compat_ioctl on some device, but programs
Ping, any feedback on this change?
Thanks
Matthias
next prev parent reply other threads:[~2017-04-19 18:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-04 18:07 Matthias Kaehlcke
2017-04-19 18:14 ` Matthias Kaehlcke [this message]
2017-04-19 20:48 ` Arnd Bergmann
2017-04-19 21:37 ` Matthias Kaehlcke
2017-04-20 8:45 ` Arnd Bergmann
2017-04-20 19:56 ` Matthias Kaehlcke
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=20170419181412.GF128305@google.com \
--to=mka@chromium.org \
--cc=arnd@arndb.de \
--cc=behanw@converseincode.com \
--cc=charlebm@gmail.com \
--cc=ghackmann@google.com \
--cc=grundler@chromium.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=md@google.com \
--cc=pefoley2@pefoley.com \
--cc=viro@zeniv.linux.org.uk \
--subject='Re: [PATCH] fs: compat: Remove warning from COMPATIBLE_IOCTL' \
/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
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).