Re: [PATCH RFC] xen/swiotlb: avoid arch_sync_dma_* on per-device DMA memory

[kernel test robot <lkp@intel.com>]

Hi Peng,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on 66672af7a095d89f082c5327f3b15bc2f93d558e]

url:    https://github.com/intel-lab-lkp/linux/commits/Peng-Fan-OSS/xen-swiotlb-avoid-arch_sync_dma_-on-per-device-DMA-memory/20260416-135556
base:   66672af7a095d89f082c5327f3b15bc2f93d558e
patch link:    https://lore.kernel.org/r/20260415-xen-swiotlb-v1-1-de24eda3c0fd%40nxp.com
patch subject: [PATCH RFC] xen/swiotlb: avoid arch_sync_dma_* on per-device DMA memory
config: x86_64-randconfig-161-20260502 (https://download.01.org/0day-ci/archive/20260502/202605021905.fOno6YnM-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
smatch: v0.5.0-9065-ge9cc34fd
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260502/202605021905.fOno6YnM-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605021905.fOno6YnM-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/xen/swiotlb-xen.c: In function 'dev_has_private_dma_pool':
>> drivers/xen/swiotlb-xen.c:200:26: error: 'struct device' has no member named 'dma_mem'
     200 |         return dev && dev->dma_mem;
         |                          ^~
>> drivers/xen/swiotlb-xen.c:201:1: warning: control reaches end of non-void function [-Wreturn-type]
     201 | }
         | ^


vim +200 drivers/xen/swiotlb-xen.c

   197	
   198	static inline bool dev_has_private_dma_pool(struct device *dev)
   199	{
 > 200		return dev && dev->dma_mem;
 > 201	}
   202	

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