linux-kernel - Re: [PATCH] cgroup: Remove unnecessary call to strstrip()

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Message-ID: <20201001144641.GB8928@haolee.github.io>
Date:   Thu, 1 Oct 2020 14:46:41 +0000
From:   Hao Lee <haolee.swjtu@...il.com>
To:     tj@...nel.org
Cc:     lizefan@...wei.com, hannes@...xchg.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroup: Remove unnecessary call to strstrip()

Ping. Thanks.

On Tue, Sep 08, 2020 at 01:33:50PM +0000, Hao Lee wrote:
> The string buf will be stripped in cgroup_procs_write_start() before it
> is converted to int, so remove this unnecessary call to strstrip().
> 
> Signed-off-by: Hao Lee <haolee.swjtu@...il.com>
> ---
>  kernel/cgroup/cgroup.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
> index b6714166106d..90ee7e73eb2e 100644
> --- a/kernel/cgroup/cgroup.c
> +++ b/kernel/cgroup/cgroup.c
> @@ -4772,14 +4772,12 @@ static ssize_t cgroup_threads_write(struct kernfs_open_file *of,
>  {
>  	struct cgroup *src_cgrp, *dst_cgrp;
>  	struct task_struct *task;
>  	ssize_t ret;
>  	bool locked;
>  
> -	buf = strstrip(buf);
> -
>  	dst_cgrp = cgroup_kn_lock_live(of->kn, false);
>  	if (!dst_cgrp)
>  		return -ENODEV;
>  
>  	task = cgroup_procs_write_start(buf, false, &locked);
>  	ret = PTR_ERR_OR_ZERO(task);
> -- 
> 2.24.1
>