Hey Stephen, Thanks a lot for reporting! I'll fix this bug in the next version. Best, Lance Yang On Tue, Apr 30, 2024 at 8:38 AM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > > Hi all, > > After merging the mm tree, today's linux-next build (arm > multi_v7_defconfig) failed like this: > > In file included from <command-line>: > mm/rmap.c: In function 'try_to_unmap_one': > include/linux/compiler_types.h:460:45: error: call to '__compiletime_assert_344' declared with attribute error: BUILD_BUG failed > 460 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) > | ^ > include/linux/compiler_types.h:441:25: note: in definition of macro '__compiletime_assert' > 441 | prefix ## suffix(); \ > | ^~~~~~ > include/linux/compiler_types.h:460:9: note: in expansion of macro '_compiletime_assert' > 460 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) > | ^~~~~~~~~~~~~~~~~~~ > include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' > 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) > | ^~~~~~~~~~~~~~~~~~ > include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' > 59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") > | ^~~~~~~~~~~~~~~~ > include/linux/huge_mm.h:99:28: note: in expansion of macro 'BUILD_BUG' > 99 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) > | ^~~~~~~~~ > include/linux/huge_mm.h:106:35: note: in expansion of macro 'HPAGE_PMD_SHIFT' > 106 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) > | ^~~~~~~~~~~~~~~ > include/linux/huge_mm.h:105:28: note: in expansion of macro 'HPAGE_PMD_SIZE' > 105 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) > | ^~~~~~~~~~~~~~ > mm/rmap.c:1651:41: note: in expansion of macro 'HPAGE_PMD_MASK' > 1651 | range.start = address & HPAGE_PMD_MASK; > | ^~~~~~~~~~~~~~ > > Caused by commit > > 34d66beb14bd ("mm/rmap: integrate PMD-mapped folio splitting into pagewalk loop") > > from the mm-unstable branch of the mm tree. > > I have reverted that commit and the following one for today. > > -- > Cheers, > Stephen Rothwell