linux-kernel - Re: linux-next: build warning after merge of the swiotlb tree

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Date:   Fri, 11 Dec 2020 02:47:24 +0000
From:   Ashish Kalra <ashish.kalra@....com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Borislav Petkov <bp@...e.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the swiotlb tree

Posted a fix for this.

Thanks,
Ashish

On Fri, Dec 11, 2020 at 01:02:08PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the swiotlb tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
> 
> In file included from arch/arm/mm/init.c:24:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from arch/arm/mm/dma-mapping.c:17:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from kernel/dma/direct.h:10,
>                  from kernel/dma/mapping.c:17:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from kernel/dma/coherent.c:10:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from kernel/dma/direct.h:10,
>                  from kernel/dma/direct.c:16:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from drivers/of/device.c:8:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from drivers/remoteproc/remoteproc_core.c:27:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from include/linux/dma-direct.h:13,
>                  from drivers/of/address.c:16:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from drivers/mmc/host/sdhci.c:23:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> In file included from drivers/gpu/drm/nouveau/nouveau_bo.c:31:
> include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
>   108 | static void swiotlb_adjust_size(unsigned long new_size)
>       |             ^~~~~~~~~~~~~~~~~~~
> 
> Introduced by commit
> 
>   79f748d1bdb6 ("x86,swiotlb: Adjust SWIOTLB bounce buffer size for SEV guests")
> 
> Forgot the "inline" :-(
> -- 
> Cheers,
> Stephen Rothwell