linux-kernel - RE: [PATCH v3 4/6] mm: don't export memory_add_physaddr_to

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Message-ID: <AM6PR08MB4069381981B2FFB9ADCD0BECF7640@AM6PR08MB4069.eurprd08.prod.outlook.com>
Date:   Thu, 9 Jul 2020 02:16:47 +0000
From:   Justin He <Justin.He@....com>
To:     Matthew Wilcox <willy@...radead.org>
CC:     Catalin Marinas <Catalin.Marinas@....com>,
        Will Deacon <will@...nel.org>, Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        David Hildenbrand <david@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Baoquan He <bhe@...hat.com>,
        Chuhong Yuan <hslester96@...il.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
        "linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Kaly Xin <Kaly.Xin@....com>
Subject: RE: [PATCH v3 4/6] mm: don't export memory_add_physaddr_to_nid in
 arch specific directory

Hi Matthew

> -----Original Message-----
> From: Matthew Wilcox <willy@...radead.org>
> Sent: Thursday, July 9, 2020 10:11 AM
> To: Justin He <Justin.He@....com>
> Cc: Catalin Marinas <Catalin.Marinas@....com>; Will Deacon
> <will@...nel.org>; Tony Luck <tony.luck@...el.com>; Fenghua Yu
> <fenghua.yu@...el.com>; Yoshinori Sato <ysato@...rs.sourceforge.jp>; Rich
> Felker <dalias@...c.org>; Dave Hansen <dave.hansen@...ux.intel.com>; Andy
> Lutomirski <luto@...nel.org>; Peter Zijlstra <peterz@...radead.org>;
> Thomas Gleixner <tglx@...utronix.de>; Ingo Molnar <mingo@...hat.com>;
> Borislav Petkov <bp@...en8.de>; David Hildenbrand <david@...hat.com>;
> x86@...nel.org; H. Peter Anvin <hpa@...or.com>; Dan Williams
> <dan.j.williams@...el.com>; Vishal Verma <vishal.l.verma@...el.com>; Dave
> Jiang <dave.jiang@...el.com>; Andrew Morton <akpm@...ux-foundation.org>;
> Baoquan He <bhe@...hat.com>; Chuhong Yuan <hslester96@...il.com>; Mike
> Rapoport <rppt@...ux.ibm.com>; Logan Gunthorpe <logang@...tatee.com>;
> Masahiro Yamada <masahiroy@...nel.org>; Michal Hocko <mhocko@...e.com>;
> linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; linux-
> ia64@...r.kernel.org; linux-sh@...r.kernel.org; linux-nvdimm@...ts.01.org;
> linux-mm@...ck.org; Jonathan Cameron <Jonathan.Cameron@...wei.com>; Kaly
> Xin <Kaly.Xin@....com>
> Subject: Re: [PATCH v3 4/6] mm: don't export memory_add_physaddr_to_nid in
> arch specific directory
> 
> On Thu, Jul 09, 2020 at 10:06:27AM +0800, Jia He wrote:
> > After a general version of __weak memory_add_physaddr_to_nid implemented
> > and exported , it is no use exporting twice in arch directory even if
> > e,g, ia64/x86 have their specific version.
> >
> > This is to suppress the modpost warning:
> > WARNING: modpost: vmlinux: 'memory_add_physaddr_to_nid' exported twice.
> > Previous export was in vmlinux
> 
> It's bad form to introduce a warning and then send a follow-up patch to
> fix the warning.  Just fold this patch into patch 1/6.
Thanks, will do

Cheers,
Justin He