Re: [PATCH 2/4] copy_signal cleanup: clean acct_init_pacct() and taskstats_tgid_init()

[Oleg Nesterov <oleg@redhat.com>]

On 12/01, Veaceslav Falico wrote:
>
> Remove unneeded initializations in acct_init_pacct() and taskstats_tgid_init().
> These are accessed only via copy_signal().
>
> Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
> ---
>
> diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
> index 3398f45..d66167a 100644
> --- a/include/linux/taskstats_kern.h
> +++ b/include/linux/taskstats_kern.h
> @@ -16,7 +16,6 @@ extern struct mutex taskstats_exit_mutex;
>
>  static inline void taskstats_tgid_init(struct signal_struct *sig)
>  {
> -	sig->stats = NULL;
>  }
>
>  static inline void taskstats_tgid_free(struct signal_struct *sig)
> diff --git a/kernel/acct.c b/kernel/acct.c
> index 9a4715a..8909c26 100644
> --- a/kernel/acct.c
> +++ b/kernel/acct.c
> @@ -592,8 +592,6 @@ out:
>   */
>  void acct_init_pacct(struct pacct_struct *pacct)
>  {
> -	memset(pacct, 0, sizeof(struct pacct_struct));
> -	pacct->ac_utime = pacct->ac_stime = cputime_zero;
>  }

Looks good imho. But please note that with this patch both
taskstats_tgid_init() and acct_init_pacct() become empty, and we
already have "empty" definitions for #ifndef case.

Perhaps it makes sense to move this (now empty) helper outside
of #ifdef, or just kill it.

Up to maintainres.

Oleg.