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SubjectRe: linux-next: build failure after merge of the akpm-current tree
On Mon, 24 Jun 2019 21:00:43 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Andrew,
>
> After merging the akpm-current tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> mm/util.c: In function '__account_locked_vm':
> mm/util.c:372:2: error: implicit declaration of function 'lockdep_assert_held_exclusive'; did you mean 'lockdep_assert_held_once'? [-Werror=implicit-function-declaration]
> lockdep_assert_held_exclusive(&mm->mmap_sem);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> lockdep_assert_held_once
> cc1: some warnings being treated as errors
>
> Caused by commit
>
> 610509219f27 ("mm-add-account_locked_vm-utility-function-v3")
>
> interacting with commit
>
> 9ffbe8ac05db ("locking/lockdep: Rename lockdep_assert_held_exclusive() -> lockdep_assert_held_write()")
>
> from the tip tree.
>
> I have applied the following merge fix patch.
>
> ...
>
> --- a/mm/util.c
> +++ b/mm/util.c
> @@ -369,7 +369,7 @@ int __account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc,
> unsigned long locked_vm, limit;
> int ret = 0;
>
> - lockdep_assert_held_exclusive(&mm->mmap_sem);
> + lockdep_assert_held_write(&mm->mmap_sem);
>
> locked_vm = mm->locked_vm;
> if (inc) {

OK, thanks, I'll stage mm-add-account_locked_vm-utility-function.patch
behind linux-next and shall fix this up.

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