Re: [PATCH v3 2/3] swiotlb: dma: its: Enforce host page-size alignment for shared buffers

kernel test robot
2026-03-09T14:56:34Z

Hi Aneesh,

kernel test robot noticed the following build errors:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on tip/irq/core arm/for-next arm/fixes kvmarm/next soc/for-next linus/master v7.0-rc3 next-20260306]
[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-swiotlb-handle-swiotlb-alloc-free-outside-__dma_direct_alloc_pages/20260309-182834
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link: https://lore.kernel.org/r/20260309102625.2315725-3-aneesh.kumar%40kernel.org
patch subject: [PATCH v3 2/3] swiotlb: dma: its: Enforce host page-size alignment for shared buffers
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260309/202603091555.ZRQIMCqJ-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260309/202603091555.ZRQIMCqJ-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/202603091555.ZRQIMCqJ-lkp@intel.com/

All errors (new ones prefixed by >>):

In file included from arch/x86/include/asm/processor-flags.h:6,
from arch/x86/include/asm/irqflags.h:5,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/swait.h:7,
from include/linux/completion.h:12,
from include/linux/crypto.h:15,
from arch/x86/kernel/asm-offsets.c:9:
include/linux/mem_encrypt.h: In function 'mem_decrypt_granule_size':
>> include/linux/mem_encrypt.h:60:16: error: 'PAGE_SIZE' undeclared (first use in this function)
60 | return PAGE_SIZE;
| ^~~~~~~~~
include/linux/mem_encrypt.h:60:16: note: each undeclared identifier is reported only once for each function it appears in
include/linux/mem_encrypt.h: In function 'mem_decrypt_align':
>> include/linux/mem_encrypt.h:66:16: error: implicit declaration of function 'ALIGN' [-Wimplicit-function-declaration]
66 | return ALIGN(size, mem_decrypt_granule_size());
| ^~~~~
make[3]: *** [scripts/Makefile.build:184: arch/x86/kernel/asm-offsets.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1333: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.

vim +/PAGE_SIZE +60 include/linux/mem_encrypt.h

56
57 #ifndef mem_decrypt_granule_size
58 static inline size_t mem_decrypt_granule_size(void)
59 {
> 60 return PAGE_SIZE;
61 }
62 #endif
63
64 static inline size_t mem_decrypt_align(size_t size)
65 {
> 66 return ALIGN(size, mem_decrypt_granule_size());
67 }
68

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