On Mon 14-08-17 17:34:32, David Rientjes wrote:
> After "mm: oom: let oom_reap_task and exit_mmap to run concurrently",
> mmput_async() is no longer used. Remove it.
>
> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Thanks!
> ---
> include/linux/sched/mm.h | 6 ------
> kernel/fork.c | 16 ----------------
> 2 files changed, 22 deletions(-)
>
> diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
> --- a/include/linux/sched/mm.h
> +++ b/include/linux/sched/mm.h
> @@ -84,12 +84,6 @@ static inline bool mmget_not_zero(struct mm_struct *mm)
>
> /* mmput gets rid of the mappings and all user-space */
> extern void mmput(struct mm_struct *);
> -#ifdef CONFIG_MMU
> -/* same as above but performs the slow path from the async context. Can
> - * be called from the atomic context as well
> - */
> -extern void mmput_async(struct mm_struct *);
> -#endif
>
> /* Grab a reference to a task's mm, if it is not already going away */
> extern struct mm_struct *get_task_mm(struct task_struct *task);
> diff --git a/kernel/fork.c b/kernel/fork.c
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -925,22 +925,6 @@ void mmput(struct mm_struct *mm)
> }
> EXPORT_SYMBOL_GPL(mmput);
>
> -#ifdef CONFIG_MMU
> -static void mmput_async_fn(struct work_struct *work)
> -{
> - struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
> - __mmput(mm);
> -}
> -
> -void mmput_async(struct mm_struct *mm)
> -{
> - if (atomic_dec_and_test(&mm->mm_users)) {
> - INIT_WORK(&mm->async_put_work, mmput_async_fn);
> - schedule_work(&mm->async_put_work);
> - }
> -}
> -#endif
> -
> /**
> * set_mm_exe_file - change a reference to the mm's executable file
> *
>
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--
Michal Hocko
SUSE Labs
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