linux-kernel - Retain all bits of the exit(2) status value

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Message-ID: <alpine.LSU.2.20.1507091257010.9602@nerf40.vanv.qr>
Date:	Thu, 9 Jul 2015 13:02:58 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...i.de>
To:	torvalds@...ux-foundation.org
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Retain all bits of the exit(2) status value

I was made aware of a suggested change to POSIX's exit function.
Current issue 7:
 http://pubs.opengroup.org/onlinepubs/9699919799/functions/exit.html
Proposed change:
 http://austingroupbugs.net/view.php?id=594#c1317
In summary:
 from "the least significant 8 bits (that is, status & 0377)"
 to "the full value shall be available from waitid()"

Now, Linux currently does a & 0xff in kernel/exit.c in the exit and 
exit_group syscalls. I would expect that the proposed change requires a 
new system call, and if so, what should its name be?
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