linux-kernel - x32 processes, with CONFIG_X86

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Message-ID: <20160325154835.GA13116@codemonkey.org.uk>
Date:	Fri, 25 Mar 2016 11:48:35 -0400
From:	Dave Jones <davej@...emonkey.org.uk>
To:	luto@...nel.org
Cc:	x86@...nel.org, Linux Kernel <linux-kernel@...r.kernel.org>
Subject: x32 processes, with CONFIG_X86_X32 not set

I had a trinity process get stuck last overnight.
The reason for it getting stuck is my bug (I think), but
there's an odd unrelated thing I noticed while debugging this..

$ strace -p 20966
strace: Process 20966 attached
strace: [ Process PID=20966 runs in x32 mode. ]

So I don't use that new-fangled x32 stuff.
I don't even have CONFIG_X86_X32 compiled in.

Is this strace getting confused, or did we somehow screw
up the syscall entry code ?

	Dave