On Thu 05-07-12 02:45:00, Johannes Weiner wrote:
> It does not matter to __mem_cgroup_try_charge() if the passed mm is
> NULL or init_mm, it will charge the root memcg in either case.
>
> Signed-off-by: Johannes Weiner <han...@cmpxchg.org>
Acked-by: Michal Hocko <mho...@suse.cz>
> ---
> mm/memcontrol.c | 5 -----
> 1 files changed, 0 insertions(+), 5 deletions(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 418b47d..6fe4101 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -2766,8 +2766,6 @@ int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
> ret = 0;
> return ret;
> charge_cur_mm:
> - if (unlikely(!mm))
> - mm = &init_mm;
> ret = __mem_cgroup_try_charge(mm, mask, 1, memcgp, true);
> if (ret == -EINTR)
> ret = 0;
> @@ -2832,9 +2830,6 @@ int mem_cgroup_cache_charge(struct page *page, struct
> mm_struct *mm,
> if (PageCompound(page))
> return 0;
>
> - if (unlikely(!mm))
> - mm = &init_mm;
> -
> if (!PageSwapCache(page))
> ret = mem_cgroup_charge_common(page, mm, gfp_mask, type);
> else { /* page is swapcache/shmem */
> --
> 1.7.7.6
>
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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