linux-kernel - Re: [PATCH] dma-mapping: avoid potential unused data compilation warning

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Message-ID: <304860b1-cd01-4d27-92eb-0bf6e30398fb@samsung.com>
Date: Fri, 18 Apr 2025 08:19:14 +0200
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, Christoph Hellwig
	<hch@....de>, Robin Murphy <robin.murphy@....com>, netdev@...r.kernel.org,
	Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH] dma-mapping: avoid potential unused data compilation
 warning

On 15.04.2025 11:39, Andy Shevchenko wrote:
> On Tue, Apr 15, 2025 at 09:56:59AM +0200, Marek Szyprowski wrote:
>> When CONFIG_NEED_DMA_MAP_STATE is not defined, dma-mapping clients might
>> report unused data compilation warnings for dma_unmap_*() calls
>> arguments. Redefine macros for those calls to let compiler to notice that
>> it is okay when the provided arguments are not used.
> Tested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
> (GCC on default i386_defconfig with `make W=1` on v6.15-rc2)

Applied to dma-mapping-fixes branch.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland