Re: [PATCH 1/2] mm: kmsan: handle alloc failures in kmsan_vmap_pages_range_noflush()

kernel test robot
2023-04-12T18:27:39Z

Hi Alexander,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url: https://github.com/intel-lab-lkp/linux/commits/Alexander-Potapenko/mm-kmsan-handle-alloc-failures-in-kmsan_ioremap_page_range/20230412-225414
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230412145300.3651840-1-glider%40google.com
patch subject: [PATCH 1/2] mm: kmsan: handle alloc failures in kmsan_vmap_pages_range_noflush()
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20230413/202304130223.epEIvA1E-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/f8f0837563234abfae564b24278879d42d52a6e8
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Alexander-Potapenko/mm-kmsan-handle-alloc-failures-in-kmsan_ioremap_page_range/20230412-225414
git checkout f8f0837563234abfae564b24278879d42d52a6e8
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 prepare

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304130223.epEIvA1E-lkp@intel.com/

All errors (new ones prefixed by >>):

In file included from arch/x86/kernel/asm-offsets.c:14:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:13:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:9:
>> include/linux/kmsan.h:291:1: error: non-void function does not return a value [-Werror,-Wreturn-type]
}
^
1 error generated.
make[2]: *** [scripts/Makefile.build:114: arch/x86/kernel/asm-offsets.s] Error 1
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:1286: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:226: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.

vim +291 include/linux/kmsan.h

68ef169a1dd20d Alexander Potapenko 2022-09-15 284
f8f0837563234a Alexander Potapenko 2023-04-12 285 static inline int kmsan_vmap_pages_range_noflush(unsigned long start,
b073d7f8aee4eb Alexander Potapenko 2022-09-15 286 unsigned long end,
b073d7f8aee4eb Alexander Potapenko 2022-09-15 287 pgprot_t prot,
b073d7f8aee4eb Alexander Potapenko 2022-09-15 288 struct page **pages,
b073d7f8aee4eb Alexander Potapenko 2022-09-15 289 unsigned int page_shift)
b073d7f8aee4eb Alexander Potapenko 2022-09-15 290 {
b073d7f8aee4eb Alexander Potapenko 2022-09-15 @291 }
b073d7f8aee4eb Alexander Potapenko 2022-09-15 292

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