linux-kernel - RE: [PATCH V2 1/9] clk: composite: Export clk_hw_register

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Message-ID: <AM6PR04MB49660A7940C920A513EC87D3809B0@AM6PR04MB4966.eurprd04.prod.outlook.com>
Date:   Thu, 18 Jun 2020 02:05:37 +0000
From:   Aisheng Dong <aisheng.dong@....com>
To:     Anson Huang <anson.huang@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "oleksandr.suvorov@...adex.com" <oleksandr.suvorov@...adex.com>,
        Stefan Agner <stefan.agner@...adex.com>,
        "arnd@...db.de" <arnd@...db.de>, Abel Vesa <abel.vesa@....com>,
        Peng Fan <peng.fan@....com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "allison@...utok.net" <allison@...utok.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "info@...ux.net" <info@...ux.net>,
        Leonard Crestez <leonard.crestez@....com>,
        Andy Duan <fugang.duan@....com>,
        Daniel Baluta <daniel.baluta@....com>,
        "yuehaibing@...wei.com" <yuehaibing@...wei.com>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V2 1/9] clk: composite: Export clk_hw_register_composite()

> From: Anson Huang <anson.huang@....com>
> Sent: Wednesday, June 17, 2020 8:32 PM
> 
> > Subject: RE: [PATCH V2 1/9] clk: composite: Export
> > clk_hw_register_composite()
> >
> > > From: Anson Huang <Anson.Huang@....com>
> > > Sent: Tuesday, June 9, 2020 3:32 PM
> > >
> > > Export clk_hw_register_composite() to support user built as module.
> > >
> > > ERROR: modpost: "clk_hw_register_composite"
> > > [drivers/clk/imx/mxc-clk.ko] undefined!
> > > scripts/Makefile.modpost:111: recipe for target 'Module.symvers'
> > > failed
> > > make[1]: *** [Module.symvers] Error 1
> > > make[1]: *** Deleting file 'Module.symvers'
> > > Makefile:1384: recipe for target 'modules' failed
> > > make: *** [modules] Error 2
> > >
> > > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > > ---
> > > No change.
> > > ---
> > >  drivers/clk/clk-composite.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/clk/clk-composite.c
> > > b/drivers/clk/clk-composite.c index 7376f57..2ddb54f 100644
> > > --- a/drivers/clk/clk-composite.c
> > > +++ b/drivers/clk/clk-composite.c
> > > @@ -328,6 +328,7 @@ struct clk_hw *clk_hw_register_composite(struct
> > > device *dev, const char *name,
> > >  					   rate_hw, rate_ops, gate_hw,
> > >  					   gate_ops, flags);
> > >  }
> > > +EXPORT_SYMBOL_GPL(clk_hw_register_composite);
> > >
> > >  struct clk_hw *clk_hw_register_composite_pdata(struct device *dev,
> > >  			const char *name,
> >
> > I guess you'd better add this one as well.
> 
> I did NOT see this is used in upstream i.MX clock driver, from my test, it is not
> necessary so far.
> 

Normally we could export them together in case it will be used in the future assuming your patch
is making clk-composite be able to be used by modules.

Anyway, it depends on Stephen's preference.

Regards
Aisheng
 
> Anson