linux-kernel - Re: [PATCH] mm: fix: Uninitialized variable ret.

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Date:   Wed, 30 Dec 2020 15:10:25 +0800
From:   Muchun Song <smuchun@...il.com>
To:     YANG LI <abaci-bugfix@...ux.alibaba.com>
Cc:     hannes@...xchg.org, mhocko@...nel.org, vdavydov.dev@...il.com,
        akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: fix: Uninitialized variable ret.

YANG LI <abaci-bugfix@...ux.alibaba.com> 于2020年12月30日周三 下午3:02写道：
>
> The ret is being used but it isn't being initialized,
> need to assign a value to it, like 0.

Hi Yang,

I didn't see where it was used without initialized.
Can you point that out to me?

Thanks.


>
> Signed-off-by: YANG LI <abaci-bugfix@...ux.alibaba.com>
> Reported-by: Abaci <abaci@...ux.alibaba.com>
> ---
>  mm/memcontrol.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 605f671..15ba17d 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -3366,7 +3366,7 @@ static int mem_cgroup_resize_max(struct mem_cgroup *memcg,
>  {
>         bool enlarge = false;
>         bool drained = false;
> -       int ret;
> +       int ret = 0;
>         bool limits_invariant;
>         struct page_counter *counter = memsw ? &memcg->memsw : &memcg->memory;
>
> --
> 1.8.3.1
>