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

From: Chen, Rong A
Date: Mon Feb 14 2022 - 01:26:31 EST

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In reply to: Wei Yang: "Re: include/linux/build_bug.h:78:41: error: static assertion failed: "offsetof(struct page, mapping) == offsetof(struct folio, mapping)""
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On 2/14/2022 8:05 AM, Wei Yang wrote:

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-lkp@xxxxxxxxx/config)
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/?id=536f4217ced62b671bd759f6b549621a5654a70f
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@xxxxxxxxx>

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?

Hi Wei,

Sorry for the inconvenience, it's a false positive, the problem is
that ARCH=parisc was used to build the 64 bit kernel.

Best Regards,
Rong Chen

Next message: Christophe Leroy: "[PATCH v6] mm: Uninline copy_overflow()"
Previous message: Leizhen (ThunderTown): "Re: [PATCH v20 2/5] arm64: kdump: introduce some macros for crash kernel reservation"
In reply to: Wei Yang: "Re: include/linux/build_bug.h:78:41: error: static assertion failed: "offsetof(struct page, mapping) == offsetof(struct folio, mapping)""
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]