linux-kernel - Re: [PATCH 19/27] [AARCH64] Add typesizes.h for ILP32

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Date:	Thu, 23 Jun 2016 07:54:27 +0300
From:	Yury Norov <ynorov@...iumnetworks.com>
To:	"Zhangjian (Bamvor)" <bamvor.zhangjian@...wei.com>
CC:	Andreas Schwab <schwab@...e.de>, <libc-alpha@...rceware.org>,
	<linux-kernel@...r.kernel.org>, <arnd@...db.de>,
	<catalin.marinas@....com>, <marcus.shawcroft@....com>,
	<philb@....org>, <davem@...emloft.net>, <szabolcs.nagy@....com>,
	<maxim.kuvyrkov@...aro.org>, <joseph@...esourcery.com>,
	<pinskia@...il.com>, Andrew Pinski <apinski@...ium.com>,
	<gaoyongliang@...wei.com>
Subject: Re: [PATCH 19/27] [AARCH64] Add typesizes.h for ILP32

On Tue, Jun 21, 2016 at 07:59:27PM +0800, Zhangjian (Bamvor) wrote:
> Hi,
> 
> On 2016/6/21 15:58, Andreas Schwab wrote:
> >Yury Norov <ynorov@...iumnetworks.com> writes:
> >
> >>diff --git a/sysdeps/unix/sysv/linux/sysdep-vdso.h b/sysdeps/unix/sysv/linux/sysdep-vdso.h
> >>index e8c4a7b..351d6bb 100644
> >>--- a/sysdeps/unix/sysv/linux/sysdep-vdso.h
> >>+++ b/sysdeps/unix/sysv/linux/sysdep-vdso.h
> >>@@ -37,7 +37,7 @@
> >>      __label__ out;							      \
> >>      __label__ iserr;							      \
> >>      INTERNAL_SYSCALL_DECL (sc_err);					      \
> >>-    long int sc_ret;							      \
> >>+    __syscall_slong_t sc_ret;						      \
> >>  									      \
> >>      __typeof (__vdso_##name) vdsop = __vdso_##name;			      \
> >>      PTR_DEMANGLE (vdsop);						      \
> >>@@ -64,7 +64,7 @@
> >>  #  define INTERNAL_VSYSCALL(name, err, nr, args...)			      \
> >>    ({									      \
> >>      __label__ out;							      \
> >>-    long v_ret;								      \
> >>+    __syscall_slong_t v_ret;						      \
> >>  									      \
> >>      __typeof (__vdso_##name) vdsop = __vdso_##name;			      \
> >>      PTR_DEMANGLE (vdsop);						      \
> >
> >That part should have no effect now that __SYSCALL_SLONG_TYPE remains to
> >be long.
> Agree. According to the discussion in "[PATCH 11/27] [AARCH64] Syscalls for ILP32 are passed
> always via 64bit values.". We should update this to long long too.
> 

I think comment to patch 11 is outdated. Andreas right, this chunk is
useless. I'll remove it in next submission.