linux-kernel - Re: [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

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Date:	Thu, 12 Nov 2015 00:07:41 +0100
From:	Andreas Schwab <schwab@...e.de>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Yury Norov <ynorov@...iumnetworks.com>, pinskia@...il.com,
	Prasun.Kapoor@...iumnetworks.com, catalin.marinas@....com,
	Nathan_Lynch@...tor.com, linux-kernel@...r.kernel.org,
	agraf@...e.de, klimov.linux@...il.com,
	Andrew Pinski <Andrew.Pinski@...iumnetworks.com>,
	broonie@...nel.org, jan.dakinevich@...il.com,
	Andrew Pinski <apinski@...ium.com>, ddaney.cavm@...il.com,
	bamvor.zhangjian@...wei.com, philipp.tomsich@...obroma-systems.com,
	andrey.konovalov@...aro.org,
	christoph.muellner@...obroma-systems.com
Subject: Re: [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

Arnd Bergmann <arnd@...db.de> writes:

> On Wednesday 11 November 2015 18:54:00 Andreas Schwab wrote:
>> Yury Norov <ynorov@...iumnetworks.com> writes:
>> 
>> > +#define sys_clock_gettime       compat_sys_clock_gettime
>> > +#define sys_clock_settime       compat_sys_clock_settime
>> 
>> You also need to redirect sys_clock_nanosleep.
>
> Note that based on my comment, that table would be turned around, and
> only the syscalls get overridden that do not have the normal
> compat mode behavior (mostly the ones that pass a 64-bit register).

Is it intented that _all_ off_t-like syscalls are implemented by the
64bit variants?  Currently, this isn't fully implemented (lseek is
implemented by sys_llseek and mmap by an mmap2 wrapper).

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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