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Message-ID: <20240423134923.osuljlalsd27awz3@quack3>
Date: Tue, 23 Apr 2024 15:49:23 +0200
From: Jan Kara <jack@...e.cz>
To: Xiu Jianfeng <xiujianfeng@...wei.com>
Cc: viro@...iv.linux.org.uk, brauner@...nel.org, jack@...e.cz,
	tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org,
	mhocko@...nel.org, roman.gushchin@...ux.dev, shakeel.butt@...ux.dev,
	muchun.song@...ux.dev, akpm@...ux-foundation.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH -next] cgroup: Introduce css_is_online() helper

On Sat 20-04-24 09:44:28, Xiu Jianfeng wrote:
> Introduce css_is_online() helper to test if whether the specified
> css is online, avoid testing css.flags with CSS_ONLINE directly
> outside of cgroup.c.
> 
> Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

One style nit below:

> +/*
> + * css_is_online - test whether the specified css is online
> + * @css: target css
> + */
> +static inline bool css_is_online(struct cgroup_subsys_state *css)
> +{
> +	return !!(css->flags & CSS_ONLINE);
> +}

Since the return type is 'bool', you don't need the !! magic in the
statement above.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR

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