linux-kernel - Re: [PATCH 2/5] mmc: au1xmmc: force non-modular build and remove symbol

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Message-Id: <599b845c-80d9-467c-b9ac-2ce844ee256e@app.fastmail.com>
Date:   Wed, 02 Aug 2023 10:31:54 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Christoph Hellwig" <hch@....de>,
        "Luis Chamberlain" <mcgrof@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Daniel Mack" <daniel@...que.org>,
        "Haojian Zhuang" <haojian.zhuang@...il.com>,
        "Robert Jarzmik" <robert.jarzmik@...e.fr>,
        "Ulf Hansson" <ulf.hansson@...aro.org>,
        "Manuel Lauss" <manuel.lauss@...il.com>,
        "Yangbo Lu" <yangbo.lu@....com>, "Joshua Kinard" <kumba@...too.org>
Cc:     "Daniel Vetter" <daniel.vetter@...ll.ch>,
        linux-arm-kernel@...ts.infradead.org,
        "open list" <linux-kernel@...r.kernel.org>,
        "linux-mmc @ vger . kernel . org" <linux-mmc@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>, linux-rtc@...r.kernel.org,
        linux-modules@...r.kernel.org
Subject: Re: [PATCH 2/5] mmc: au1xmmc: force non-modular build and remove symbol_get
 usage

On Tue, Aug 1, 2023, at 19:35, Christoph Hellwig wrote:
> au1xmmc is split somewhat awkwardly into the main mmc subsystem driver,
> and callbacks in platform_data that sit under arch/mips/ and are
> always built in.  The latter than call mmc_detect_change through
> symbol_get.  Remove the use of symbol_get by requiring the driver
> to be built in.  In the future the interrupt handlers for card
> insert/eject detection should probably be moved into the main driver,
> and which point it can be built modular again.
>
> Signed-off-by: Christoph Hellwig <hch@....de>

Good idea.

>  	  of Alcor Micro PCI-E card reader
> 
>  config MMC_AU1X
> -	tristate "Alchemy AU1XX0 MMC Card Interface support"
> +	bool "Alchemy AU1XX0 MMC Card Interface support"
>  	depends on MIPS_ALCHEMY
>  	help

This needs a 

      depends on MMC=y

otherwise you get a link failure with CONFIG_MMC=m and
CONFIG_MMC_AU1X=y.

With that fixed,

Reviewed-by: Arnd Bergmann <arnd@...db.de>