linux-kernel - Re: [PATCH] asm-generic: Drop getrlimit and setrlimit syscalls from default list

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Message-ID: <2502005.4risrb1P1I@wuerfel>
Date:   Sat, 29 Oct 2016 23:02:40 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Yury Norov <ynorov@...iumnetworks.com>
Cc:     James Hogan <james.hogan@...tec.com>, linux-arch@...r.kernel.org,
        Vineet Gupta <vgupta@...opsys.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Salter <msalter@...hat.com>,
        Aurelien Jacquiot <a-jacquiot@...com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Richard Kuo <rkuo@...eaurora.org>,
        Ley Foon Tan <lftan@...era.com>,
        Jonas Bonn <jonas@...thpole.se>,
        Chen Liqin <liqin.linux@...il.com>,
        Lennox Wu <lennox.wu@...il.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Guan Xuetao <gxt@...c.pku.edu.cn>,
        Andrew Pinski <Andrew.Pinski@...ium.com>,
        linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
        uclinux-h8-devel@...ts.sourceforge.jp,
        linux-hexagon@...r.kernel.org, linux-metag@...r.kernel.org,
        nios2-dev@...ts.rocketboards.org
Subject: Re: [PATCH] asm-generic: Drop getrlimit and setrlimit syscalls from default list

On Saturday, October 22, 2016 3:14:04 PM CEST Yury Norov wrote:
> The newer prlimit64 syscall provides all the functionality provided by
> the getrlimit and setrlimit syscalls and adds the pid of target process,
> so future architectures won't need to include getrlimit and setrlimit.
> 
> Therefore drop getrlimit and setrlimit syscalls from the generic syscall
> list unless __ARCH_WANT_SET_GET_RLIMIT is defined by the architecture's
> unistd.h prior to including asm-generic/unistd.h, and adjust all
> architectures using the generic syscall list to define it so that no
> in-tree architectures are affected.

The patch looks good, but shouldn't we also hide the actual syscall
implementation if the symbol is not set? It's just dead code otherwise
for new architectures.

	Arnd