linux-kernel - Re: [PATCH 2/2] dma-direct: Make phys_to_dma() pick encrypted vs unencrypted per device

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Message-ID: <202601201857.7LKBY5dB-lkp@intel.com>
Date: Tue, 20 Jan 2026 18:49:27 +0800
From: kernel test robot <lkp@...el.com>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>,
	linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
	linux-coco@...ts.linux.dev
Cc: oe-kbuild-all@...ts.linux.dev,
	Catalin Marinas <catalin.marinas@....com>, will@...nel.org,
	robin.murphy@....com, suzuki.poulose@....com, jgg@...pe.ca,
	steven.price@....com, Marek Szyprowski <m.szyprowski@...sung.com>,
	"Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
Subject: Re: [PATCH 2/2] dma-direct: Make phys_to_dma() pick encrypted vs
 unencrypted per device

Hi Aneesh,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.19-rc6 next-20260119]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Aneesh-Kumar-K-V-Arm/dma-direct-Make-phys_to_dma-pick-encrypted-vs-unencrypted-per-device/20260120-145025
base:   linus/master
patch link:    https://lore.kernel.org/r/20260120064255.179425-2-aneesh.kumar%40kernel.org
patch subject: [PATCH 2/2] dma-direct: Make phys_to_dma() pick encrypted vs unencrypted per device
config: alpha-allnoconfig (https://download.01.org/0day-ci/archive/20260120/202601201857.7LKBY5dB-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260120/202601201857.7LKBY5dB-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601201857.7LKBY5dB-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/dma/direct.h:10,
                    from kernel/dma/mapping.c:19:
   include/linux/dma-direct.h: In function 'phys_to_dma':
>> include/linux/dma-direct.h:103:13: error: implicit declaration of function 'force_dma_unencrypted'; did you mean 'phys_to_dma_unencrypted'? [-Wimplicit-function-declaration]
     103 |         if (force_dma_unencrypted(dev))
         |             ^~~~~~~~~~~~~~~~~~~~~
         |             phys_to_dma_unencrypted
   include/linux/dma-direct.h: At top level:
>> include/linux/dma-direct.h:125:20: error: conflicting types for 'force_dma_unencrypted'; have 'bool(struct device *)' {aka '_Bool(struct device *)'}
     125 | static inline bool force_dma_unencrypted(struct device *dev)
         |                    ^~~~~~~~~~~~~~~~~~~~~
   include/linux/dma-direct.h:103:13: note: previous implicit declaration of 'force_dma_unencrypted' with type 'int()'
     103 |         if (force_dma_unencrypted(dev))
         |             ^~~~~~~~~~~~~~~~~~~~~


vim +103 include/linux/dma-direct.h

   102	
 > 103		if (force_dma_unencrypted(dev))
   104			return phys_to_dma_unencrypted(dev, paddr);
   105		return phys_to_dma_encrypted(dev, paddr);
   106	}
   107	
   108	static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
   109	{
   110		phys_addr_t paddr;
   111	
   112		dma_addr = dma_addr_canonical(dma_addr);
   113		if (dev->dma_range_map)
   114			paddr = translate_dma_to_phys(dev, dma_addr);
   115		else
   116			paddr = dma_addr;
   117	
   118		return paddr;
   119	}
   120	#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
   121	
   122	#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
   123	bool force_dma_unencrypted(struct device *dev);
   124	#else
 > 125	static inline bool force_dma_unencrypted(struct device *dev)
   126	{
   127		return false;
   128	}
   129	#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
   130	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki