Re: linux-next: build failure after merge of the akpm-current tree

Song Liu
2019-08-07T14:39:22Z

Hi Stephen,

> On Aug 7, 2019, at 12:24 AM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Hi all,
>
> After merging the akpm-current tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> In file included from include/linux/kernel.h:11,
> from kernel/events/uprobes.c:12:
> kernel/events/uprobes.c: In function 'uprobe_write_opcode':
> include/linux/compiler.h:350:38: error: call to '__compiletime_assert_557' declared with attribute error: BUILD_BUG failed
> _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
> ^
> include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert'
> prefix ## suffix(); \
> ^~~~~~
> include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert'
> _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
> ^~~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
> #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'
> #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
> ^~~~~~~~~~~~~~~~
> include/linux/huge_mm.h:272:27: note: in expansion of macro 'BUILD_BUG'
> #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; })
> ^~~~~~~~~
> kernel/events/uprobes.c:557:39: note: in expansion of macro 'HPAGE_PMD_MASK'
> collapse_pte_mapped_thp(mm, vaddr & HPAGE_PMD_MASK);
> ^~~~~~~~~~~~~~
>
> Caused by commit
>
> 9cc0b998b380 ("uprobe: collapse THP pmd after removing all uprobes")
>
> I have reverted that commit for today.

Thanks for the heads-up.

This looks like v3 of the patchset. I have fixed this issue in v4:

https://lkml.org/lkml/2019/8/2/1587
https://lkml.org/lkml/2019/8/2/1588
https://lkml.org/lkml/2019/8/2/1589

Is this sufficient? Or shall I submit fixes on top of v3?

Thanks,
Song