tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b3a3cbdec55b090d22a09f75efb7c7d34cb97f25 commit: 23a501a73218142f7b1d90e7a11a9ae800d1273f [3947/3956] secretmem: use PMD-size pages to amortize direct map fragmentation config: riscv-randconfig-r003-20210118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bfd75bdf3fd62d4f5e7028d4122f9ffa517f2a09) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=23a501a73218142f7b1d90e7a11a9ae800d1273f git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 23a501a73218142f7b1d90e7a11a9ae800d1273f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return inw(addr); ^~~~~~~~~ arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw' #define inw(c) ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu' #define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; }) ^ include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from mm/secretmem.c:15: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return inl(addr); ^~~~~~~~~ arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl' #define inl(c) ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu' #define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; }) ^ include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from mm/secretmem.c:15: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outb(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb' #define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu' #define writeb_cpu(v, c) ((void)__raw_writeb((v), (c))) ^ In file included from mm/secretmem.c:15: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outw(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw' #define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu' #define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c))) ^ In file included from mm/secretmem.c:15: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outl(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl' #define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu' #define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c))) ^ In file included from mm/secretmem.c:15: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:149: include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ >> mm/secretmem.c:49:33: error: use of undeclared identifier 'PMD_PAGE_ORDER' unsigned long nr_pages = (1 << PMD_PAGE_ORDER); ^ mm/secretmem.c:156:6: error: implicit declaration of function 'mlock_future_check' [-Werror,-Wimplicit-function-declaration] if (mlock_future_check(vma->vm_mm, vma->vm_flags | VM_LOCKED, len)) ^ 7 warnings and 2 errors generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for CMA Depends on MMU Selected by - SECRETMEM vim +/PMD_PAGE_ORDER +49 mm/secretmem.c 46 47 static int secretmem_pool_increase(struct secretmem_ctx *ctx, gfp_t gfp) 48 { > 49 unsigned long nr_pages = (1 << PMD_PAGE_ORDER); 50 struct gen_pool *pool = ctx->pool; 51 unsigned long addr; 52 struct page *page; 53 int err; 54 55 page = cma_alloc(secretmem_cma, nr_pages, PMD_SIZE, gfp & __GFP_NOWARN); 56 if (!page) 57 return -ENOMEM; 58 59 err = set_direct_map_invalid_noflush(page, nr_pages); 60 if (err) 61 goto err_cma_release; 62 63 addr = (unsigned long)page_address(page); 64 err = gen_pool_add(pool, addr, PMD_SIZE, NUMA_NO_NODE); 65 if (err) 66 goto err_set_direct_map; 67 68 flush_tlb_kernel_range(addr, addr + PMD_SIZE); 69 70 return 0; 71 72 err_set_direct_map: 73 /* 74 * If a split of PUD-size page was required, it already happened 75 * when we marked the pages invalid which guarantees that this call 76 * won't fail 77 */ 78 set_direct_map_default_noflush(page, nr_pages); 79 err_cma_release: 80 cma_release(secretmem_cma, page, nr_pages); 81 return err; 82 } 83 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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