Hi Mike, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 51551d71edbc998fd8c8afa7312db3d270f5998e commit: a37d26b620530076879100bb6e3953458bf069fe [269/293] mm: move most of core MM initialization to mm/mm_init.c config: loongarch-allnoconfig (https://download.01.org/0day-ci/archive/20230323/202303231850.ZgGa5u2h-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 12.1.0 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://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=a37d26b620530076879100bb6e3953458bf069fe git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git git fetch --no-tags akpm-mm mm-unstable git checkout a37d26b620530076879100bb6e3953458bf069fe # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303231850.ZgGa5u2h-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages) | ^~~~~~~~~~ include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages' 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages) | ^~~~~~~~~~~~~~~~~~ mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn' 787 | if (!pfn_valid(pageblock_start_pfn(pfn))) { | ^~~~~~~~~~~~~~~~~~~ include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK' 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) | ^~~~ include/linux/align.h:9:33: note: in expansion of macro '__ALIGN_KERNEL' 9 | #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) | ^~~~~~~~~~~~~~ include/linux/pageblock-flags.h:58:41: note: in expansion of macro 'ALIGN_DOWN' 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages) | ^~~~~~~~~~ include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages' 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages) | ^~~~~~~~~~~~~~~~~~ mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn' 787 | if (!pfn_valid(pageblock_start_pfn(pfn))) { | ^~~~~~~~~~~~~~~~~~~ include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK' 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) | ^~~~ include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) | ^~~~~~~~~~~~~~ include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN' 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages) | ^~~~~ include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages' 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages) | ^~~~~~~~~~~~~~~~~~ mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn' 788 | pfn = pageblock_end_pfn(pfn) - 1; | ^~~~~~~~~~~~~~~~~ include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK' 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) | ^~~~ include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) | ^~~~~~~~~~~~~~ include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN' 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages) | ^~~~~ include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages' 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages) | ^~~~~~~~~~~~~~~~~~ mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn' 788 | pfn = pageblock_end_pfn(pfn) - 1; | ^~~~~~~~~~~~~~~~~ mm/mm_init.c: In function 'memmap_init_range': include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ include/linux/align.h:13:62: note: in definition of macro 'IS_ALIGNED' 13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) | ^ include/linux/pageblock-flags.h:57:51: note: in expansion of macro 'pageblock_nr_pages' 57 | #define pageblock_aligned(pfn) IS_ALIGNED((pfn), pageblock_nr_pages) | ^~~~~~~~~~~~~~~~~~ mm/mm_init.c:863:21: note: in expansion of macro 'pageblock_aligned' 863 | if (pageblock_aligned(pfn)) { | ^~~~~~~~~~~~~~~~~ In file included from include/linux/mmzone.h:19, from include/linux/gfp.h:7, from include/linux/xarray.h:15, from include/linux/radix-tree.h:21, from include/linux/idr.h:15, from include/linux/kernfs.h:12, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from mm/mm_init.c:11: mm/mm_init.c: In function 'usemap_size': include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ mm/mm_init.c:1384:39: note: in expansion of macro 'pageblock_nr_pages' 1384 | zonesize += zone_start_pfn & (pageblock_nr_pages-1); | ^~~~~~~~~~~~~~~~~~ include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative] 55 | #define pageblock_nr_pages (1UL << pageblock_order) | ^~ include/linux/math.h:61:25: note: in definition of macro 'roundup' 61 | typeof(y) __y = y; \ | ^ mm/mm_init.c:1385:40: note: in expansion of macro 'pageblock_nr_pages' 1385 | usemapsize = roundup(zonesize, pageblock_nr_pages); | ^~~~~~~~~~~~~~~~~~ >> mm/mm_init.c:1386:33: warning: right shift count is negative [-Wshift-count-negative] 1386 | usemapsize = usemapsize >> pageblock_order; | ^~ mm/mm_init.c: In function 'alloc_node_mem_map': include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative] 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) | ^~ mm/mm_init.c:1587:43: note: in expansion of macro 'MAX_ORDER_NR_PAGES' 1587 | start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1); | ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative] 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) | ^~ include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK' 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) | ^~~~ include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) | ^~~~~~~~~~~~~~ mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN' 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES); | ^~~~~ mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES' 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES); | ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative] 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) | ^~ include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK' 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) | ^~~~ include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) | ^~~~~~~~~~~~~~ mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN' 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES); | ^~~~~ mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES' 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES); | ^~~~~~~~~~~~~~~~~~ vim +1386 mm/mm_init.c 1371 1372 #ifndef CONFIG_SPARSEMEM 1373 /* 1374 * Calculate the size of the zone->blockflags rounded to an unsigned long 1375 * Start by making sure zonesize is a multiple of pageblock_order by rounding 1376 * up. Then use 1 NR_PAGEBLOCK_BITS worth of bits per pageblock, finally 1377 * round what is now in bits to nearest long in bits, then return it in 1378 * bytes. 1379 */ 1380 static unsigned long __init usemap_size(unsigned long zone_start_pfn, unsigned long zonesize) 1381 { 1382 unsigned long usemapsize; 1383 1384 zonesize += zone_start_pfn & (pageblock_nr_pages-1); 1385 usemapsize = roundup(zonesize, pageblock_nr_pages); > 1386 usemapsize = usemapsize >> pageblock_order; 1387 usemapsize *= NR_PAGEBLOCK_BITS; 1388 usemapsize = roundup(usemapsize, 8 * sizeof(unsigned long)); 1389 1390 return usemapsize / 8; 1391 } 1392 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
