[kbuild-all] Re: include/linux/build_bug.h:78:41: error: static assertion failed: "offsetof(struct page, mapping) == offsetof(struct folio, mapping)"

On Sun, Feb 13, 2022 at 07:51:34PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: b81b1829e7e39f6cebdf6e4d5484eacbceda8554 > commit: 536f4217ced62b671bd759f6b549621a5654a70f mm: page->mapping folio->mapping should have the same offset > date: 2 weeks ago > config: parisc-randconfig-r004-20220213 (https://download.01.org/0day-ci/archive/20220213/202202131932.diaqTbxo-lk...) > compiler: hppa64-linux-gcc (GCC) 11.2.0 > 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/torvalds/linux.git/commit... > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout 536f4217ced62b671bd759f6b549621a5654a70f > # save the config file to linux build tree > mkdir build_dir > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=parisc prepare > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All errors (new ones prefixed by >>): > > 18 | if (!(word & (~0ul << 32))) { > | ^~ > include/asm-generic/bitops/__fls.h:20:22: warning: left shift count >= width of type [-Wshift-count-overflow] > 20 | word <<= 32; > | ^~~ > include/asm-generic/bitops/__fls.h:23:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 23 | if (!(word & (~0ul << (BITS_PER_LONG-16)))) { > | ^~ > include/asm-generic/bitops/__fls.h:27:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 27 | if (!(word & (~0ul << (BITS_PER_LONG-8)))) { > | ^~ > include/asm-generic/bitops/__fls.h:31:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 31 | if (!(word & (~0ul << (BITS_PER_LONG-4)))) { > | ^~ > include/asm-generic/bitops/__fls.h:35:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 35 | if (!(word & (~0ul << (BITS_PER_LONG-2)))) { > | ^~ > include/asm-generic/bitops/__fls.h:39:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 39 | if (!(word & (~0ul << (BITS_PER_LONG-1)))) > | ^~ > In file included from arch/parisc/include/asm/bitops.h:201, > from include/linux/bitops.h:33, > from include/linux/kernel.h:22, > from arch/parisc/include/asm/bug.h:5, > from include/linux/bug.h:5, > from include/linux/thread_info.h:13, > from include/asm-generic/preempt.h:5, > from ./arch/parisc/include/generated/asm/preempt.h:1, > from include/linux/preempt.h:78, > from include/linux/rcupdate.h:27, > from include/linux/rculist.h:11, > from include/linux/pid.h:5, > from include/linux/sched.h:14, > from arch/parisc/kernel/asm-offsets.c:18: > include/asm-generic/bitops/__fls.h: In function '__fls': > include/asm-generic/bitops/__fls.h:18:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 18 | if (!(word & (~0ul << 32))) { > | ^~ > include/asm-generic/bitops/__fls.h:20:22: warning: left shift count >= width of type [-Wshift-count-overflow] > 20 | word <<= 32; > | ^~~ > include/asm-generic/bitops/__fls.h:23:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 23 | if (!(word & (~0ul << (BITS_PER_LONG-16)))) { > | ^~ > include/asm-generic/bitops/__fls.h:27:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 27 | if (!(word & (~0ul << (BITS_PER_LONG-8)))) { > | ^~ > include/asm-generic/bitops/__fls.h:31:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 31 | if (!(word & (~0ul << (BITS_PER_LONG-4)))) { > | ^~ > include/asm-generic/bitops/__fls.h:35:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 35 | if (!(word & (~0ul << (BITS_PER_LONG-2)))) { > | ^~ > include/asm-generic/bitops/__fls.h:39:28: warning: left shift count >= width of type [-Wshift-count-overflow] > 39 | if (!(word & (~0ul << (BITS_PER_LONG-1)))) > | ^~ > In file included from arch/parisc/include/asm/processor.h:18, > from arch/parisc/include/asm/thread_info.h:6, > from include/linux/thread_info.h:60, > from include/asm-generic/preempt.h:5, > from ./arch/parisc/include/generated/asm/preempt.h:1, > from include/linux/preempt.h:78, > from include/linux/rcupdate.h:27, > from include/linux/rculist.h:11, > from include/linux/pid.h:5, > from include/linux/sched.h:14, > from arch/parisc/kernel/asm-offsets.c:18: > arch/parisc/include/asm/pdc.h: At top level: > arch/parisc/include/asm/pdc.h:77:24: warning: 'struct pdc_memory_table' declared inside parameter list will not be visible outside of this definition or declaration > 77 | struct pdc_memory_table *tbl, unsigned long entries); > | ^~~~~~~~~~~~~~~~ > arch/parisc/include/asm/pdc.h:76:30: warning: 'struct pdc_memory_table_raddr' declared inside parameter list will not be visible outside of this definition or declaration > 76 | int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, > | ^~~~~~~~~~~~~~~~~~~~~~ > In file included from include/linux/compiler_types.h:65, > from <command-line>: > include/linux/smp.h:34:33: error: requested alignment '20' is not a positive power of 2 > 34 | __aligned(sizeof(struct __call_single_data)); > | ^~~~~~~~~~~~~~~~~~ > include/linux/compiler_attributes.h:33:68: note: in definition of macro '__aligned' > 33 | #define __aligned(x) __attribute__((__aligned__(x))) > | ^ > In file included from include/linux/container_of.h:5, > from include/linux/list.h:5, > from include/linux/rculist.h:10, > from include/linux/pid.h:5, > from include/linux/sched.h:14, > from arch/parisc/kernel/asm-offsets.c:18: > include/linux/build_bug.h:78:41: error: static assertion failed: "offsetof(struct page, lru) == offsetof(struct folio, lru)" > 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > | ^~~~~~~~~~~~~~ > include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' > 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > | ^~~~~~~~~~~~~~~ > include/linux/mm_types.h:261:9: note: in expansion of macro 'static_assert' > 261 | static_assert(offsetof(struct page, pg) == offsetof(struct folio, fl)) > | ^~~~~~~~~~~~~ > include/linux/mm_types.h:263:1: note: in expansion of macro 'FOLIO_MATCH' > 263 | FOLIO_MATCH(lru, lru); Sounds each FOLIO_MATCH() gets an compile error? Compile on my machine looks good to me. How this happens?