Re: [PATCH 5/5] dma-buf: heaps: system: add an option to allocate explicitly decrypted memory

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

Hi Jiri,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on drm-tip/drm-tip trace/for-next linus/master v6.19]
[cannot apply to next-20260209]
[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/Jiri-Pirko/dma-mapping-avoid-random-addr-value-print-out-on-error-path/20260209-234013
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260209153809.250835-6-jiri%40resnulli.us
patch subject: [PATCH 5/5] dma-buf: heaps: system: add an option to allocate explicitly decrypted memory
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20260211/202602110149.tBUPP0bh-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260211/202602110149.tBUPP0bh-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/202602110149.tBUPP0bh-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/dma-buf/heaps/system_heap.c: In function 'system_heap_set_page_decrypted':
>> drivers/dma-buf/heaps/system_heap.c:66:15: error: implicit declaration of function 'set_memory_decrypted' [-Wimplicit-function-declaration]
      66 |         ret = set_memory_decrypted(addr, nr_pages);
         |               ^~~~~~~~~~~~~~~~~~~~
   drivers/dma-buf/heaps/system_heap.c: In function 'system_heap_set_page_encrypted':
>> drivers/dma-buf/heaps/system_heap.c:80:15: error: implicit declaration of function 'set_memory_encrypted' [-Wimplicit-function-declaration]
      80 |         ret = set_memory_encrypted(addr, nr_pages);
         |               ^~~~~~~~~~~~~~~~~~~~


vim +/set_memory_decrypted +66 drivers/dma-buf/heaps/system_heap.c

    59	
    60	static int system_heap_set_page_decrypted(struct page *page)
    61	{
    62		unsigned long addr = (unsigned long)page_address(page);
    63		unsigned int nr_pages = 1 << compound_order(page);
    64		int ret;
    65	
  > 66		ret = set_memory_decrypted(addr, nr_pages);
    67		if (ret)
    68			pr_warn_ratelimited("dma-buf system heap: failed to decrypt page at %p\n",
    69					    page_address(page));
    70	
    71		return ret;
    72	}
    73	
    74	static int system_heap_set_page_encrypted(struct page *page)
    75	{
    76		unsigned long addr = (unsigned long)page_address(page);
    77		unsigned int nr_pages = 1 << compound_order(page);
    78		int ret;
    79	
  > 80		ret = set_memory_encrypted(addr, nr_pages);
    81		if (ret)
    82			pr_warn_ratelimited("dma-buf system heap: failed to re-encrypt page at %p, leaking memory\n",
    83					    page_address(page));
    84	
    85		return ret;
    86	}
    87	

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