linux-kernel - Re: [PATCH 20/25] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

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Date:	Thu, 28 Apr 2016 22:43:59 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Yury Norov <ynorov@...iumnetworks.com>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-s390@...r.kernel.org,
	pinskia@...il.com, Prasun.Kapoor@...iumnetworks.com,
	schwab@...e.de, broonie@...nel.org, linux-doc@...r.kernel.org,
	heiko.carstens@...ibm.com, agraf@...e.de, klimov.linux@...il.com,
	Andrew Pinski <Andrew.Pinski@...iumnetworks.com>,
	bamvor.zhangjian@...wei.com, Andrew Pinski <apinski@...ium.com>,
	schwidefsky@...ibm.com, Nathan_Lynch@...tor.com,
	joseph@...esourcery.com, christoph.muellner@...obroma-systems.com
Subject: Re: [PATCH 20/25] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

On Thursday 28 April 2016 22:19:14 Yury Norov wrote:
> 
> Yes, we need. Otherwise we have circular dependency like this:
> arch/arm64/kernel/sys_ilp32.c:60:0: warning: "__SC_WRAP" redefined
>  #define __SC_WRAP(nr, sym) [nr] = compat_##sym,
>   ^
>   In file included from include/asm-generic/unistd.h:1:0,
>                    from ./arch/arm64/include/uapi/asm/unistd.h:16,
>                    from ./arch/arm64/include/asm/unistd.h:62,
>                    from ./include/uapi/linux/unistd.h:7,
>                    from include/linux/syscalls.h:23,
>                    from arch/arm64/kernel/sys_ilp32.c:30:
> include/uapi/asm-generic/unistd.h:33:0: note: this is the location of the previous definition
>  #define __SC_WRAP __SYSCALL
> 
> Defining __SYSCALL_COMPAT at the top of the file does not help much.

Hmm, this sounds like something that we should fix in the asm-generic/unistd.h
file. Is it just for __SC_WRAP, or also the other macros?

	Arnd