linux-kernel - Re: [PATCH] mmc: atmel-mci: fix mismatched section on atmci_cleanup

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Date:	Mon, 29 Sep 2014 09:34:25 +0200
From:	Ludovic Desroches <ludovic.desroches@...el.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	<linux-kernel@...r.kernel.org>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	<linux-mmc@...r.kernel.org>
Subject: Re: [PATCH] mmc: atmel-mci: fix mismatched section on
 atmci_cleanup_slot

On Fri, Sep 26, 2014 at 09:34:58PM +0200, Arnd Bergmann wrote:
> As of 528bc7808f4e ("mmc: atmel-mci: Release mmc resources on failure in probe"),
> the atmci_probe() function calls atmci_cleanup_slot in the failure path.
> 
> This causes a new warning whenever the driver is built:
> 
> WARNING: drivers/mmc/host/built-in.o(.init.text+0xa04): Section mismatch in reference from the function atmci_probe() to the function .exit.text:atmci_cleanup_slot()
> The function __init atmci_probe() references
> a function __exit atmci_cleanup_slot().
> 
> Gcc correctly warns about this function getting dropped in the link stage
> for the built-in case, which would cause undefined behavior when this error
> path is hit. The solution is to simply drop the __exit annotation.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Ludovic Desroches <ludovic.desroches@...el.com>

Thanks, I also missed this warning when compiling.

> Fixes: 528bc7808f4e ("mmc: atmel-mci: Release mmc resources on failure in probe")
> 
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 772ef5b0e4d5..974626087732 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -2244,7 +2244,7 @@ static int __init atmci_init_slot(struct atmel_mci *host,
>  	return 0;
>  }
>  
> -static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot,
> +static void atmci_cleanup_slot(struct atmel_mci_slot *slot,
>  		unsigned int id)
>  {
>  	/* Debugfs stuff is cleaned up by mmc core */
--
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