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

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Message-ID: <Z_4pZm_tQ6qmmj35@smile.fi.intel.com>
Date: Tue, 15 Apr 2025 12:39:50 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Marek Szyprowski <m.szyprowski@...sung.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 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)

-- 
With Best Regards,
Andy Shevchenko