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From: "Li, Philip" <philip.li@intel.com>
Subject: RE: [kbuild-all] [linux-stable-rc:linux-4.14.y 3879/4798]
 kernel//time/posix-timers.c:1231:1: note: in expansion of macro
 'COMPAT_SYSCALL_DEFINE4'
Date: Tue, 29 May 2018 15:37:59 +0000
Message-ID: <831EE4E5E37DCC428EB295A351E662494CB98CE2@shsmsx102.ccr.corp.intel.com>
References: <201805292323.ZKQwkUJy%fengguang.wu@intel.com>
 <20180529153252.GB521@tigerII.localdomain>
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To: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, lkp <lkp@intel.com>
Cc: Linux Memory Management List <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, "kbuild-all@01.org" <kbuild-all@01.org>, Greg
 Kroah-Hartman <gregkh@linuxfoundation.org>

> Subject: Re: [kbuild-all] [linux-stable-rc:linux-4.14.y 3879/4798] kernel=
//time/posix-
> timers.c:1231:1: note: in expansion of macro 'COMPAT_SYSCALL_DEFINE4'
>=20
> On (05/29/18 23:23), kbuild test robot wrote:
> > Hi Sergey,
> >
> > First bad commit (maybe !=3D root cause):
> >
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-st=
able-rc.git
> linux-4.14.y
> > head:   9fcb9d72e8a3a813caae6e2fac43a73603d75abd
> > commit: 8e99c881e497e7f7528f693c563e204ae888a846 [3879/4798]
> tools/lib/subcmd/pager.c: do not alias select() params
> > config: x86_64-acpi-redef (attached as .config)
> > compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> > reproduce:
> >         git checkout 8e99c881e497e7f7528f693c563e204ae888a846
> >         # save the attached .config to linux build tree
> >         make ARCH=3Dx86_64
>=20
> Hello,
>=20
> The commit in question is for a user space tool. I don't think it has
> anything to do with the __SYSCALL_DEFINEx macro.
thanks for info, we also got similar "false" warning in other report, for n=
ow, I will
roll back to gcc-7.3, and do more check for 8.1.

>=20
> Seems that you have switched to gcc-8.1, which has aliasing warning ON
> by default.
>=20
> 	-ss
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