From: "Skidanov, Alexey" <Alexey.Skidanov@amd.com>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: 32 bit user space compatibility
Date: Sun, 26 Oct 2014 12:25:08 +0000 [thread overview]
Message-ID: <AD975D71AAD7784D8D1265DF6444C2FD0C4307FC@storexdag03.amd.com> (raw)
Hi,
Running 32 bit user space needs some work to be done with ioctls. I understand that there are two options to implement:
1. Use only fixed size types. Pad IOCTLS params to multiple of 64 bits - simple; don't know if it covers all compatibility issues;
2. 32 bit compatibility layer (through compat_ioctl, just like many drivers in kernel implement) - just a little bit simple code with some translations; really covers all issues;
Which one is preferred by kernel community?
Thanks
Alexey
next reply other threads:[~2014-10-26 12:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-26 12:25 Skidanov, Alexey [this message]
2014-10-28 22:34 ` One Thousand Gnomes
2014-11-03 12:46 ` Yann Droneaud
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