linux-next: build failure in final build
From: Mark Brown
Date: Wed Apr 01 2026 - 10:22:47 EST
Hi all,
During the final build, today's linux-next build (sparc64 defconfig)
failed like this:
In file included from <command-line>:
In function 'sparse_init_one_section',
inlined from 'sparse_init_early_section' at /tmp/next/build/mm/sparse.c:323:2:
/tmp/next/build/include/linux/compiler_types.h:699:45: error: call to '__compiletime_assert_420' declared with attribute error: BUILD_BUG_ON failed: SECTION_MAP_LAST_BIT > min(PFN_SECTION_SHIFT + __ffs(sizeof(struct page)), PAGE_SHIFT)
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
/tmp/next/build/include/linux/compiler_types.h:680:25: note: in definition of macro '__compiletime_assert'
680 | prefix ## suffix(); \
| ^~~~~~
/tmp/next/build/include/linux/compiler_types.h:699:9: note: in expansion of macro '_compiletime_assert'
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
/tmp/next/build/include/linux/build_bug.h:40:37: note: in expansion of macro 'compiletime_assert'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
/tmp/next/build/include/linux/build_bug.h:51:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
/tmp/next/build/mm/internal.h:975:9: note: in expansion of macro 'BUILD_BUG_ON'
975 | BUILD_BUG_ON(SECTION_MAP_LAST_BIT > min(PFN_SECTION_SHIFT + __ffs(sizeof(struct page)),
| ^~~~~~~~~~~~
Caused by commit
28208ad9dae4d (mm/sparse: fix BUILD_BUG_ON check for section map alignment)
from the mm-unstable tree. I have reverted that commit for today.
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