linux-kernel - Re: [PATCH v8 02/12] kthread: Kthread worker API cleanup

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Message-ID: <20160609172234.GW30154@twins.programming.kicks-ass.net>
Date:	Thu, 9 Jun 2016 19:22:34 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Petr Mladek <pmladek@...e.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>, Borislav Petkov <bp@...e.de>,
	Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org,
	Vlastimil Babka <vbabka@...e.cz>, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 02/12] kthread: Kthread worker API cleanup

On Thu, Jun 09, 2016 at 03:51:56PM +0200, Petr Mladek wrote:
> -#define DEFINE_KTHREAD_WORKER(worker)					\
> -	struct kthread_worker worker = KTHREAD_WORKER_INIT(worker)
> +#define KTHREAD_DECLARE_WORKER(worker)					\
> +	struct kthread_worker worker = KTHREAD_INIT_WORKER(worker)
>  
> -#define DEFINE_KTHREAD_WORK(work, fn)					\
> -	struct kthread_work work = KTHREAD_WORK_INIT(work, fn)
> +#define KTHREAD_DECLARE_WORK(work, fn)					\
> +	struct kthread_work work = KTHREAD_INIT_WORK(work, fn)
>  
>  /*
>   * kthread_worker.lock needs its own lockdep class key when defined on
>   * stack with lockdep enabled.  Use the following macros in such cases.
>   */
>  #ifdef CONFIG_LOCKDEP
> -# define KTHREAD_WORKER_INIT_ONSTACK(worker)				\
> -	({ init_kthread_worker(&worker); worker; })
> -# define DEFINE_KTHREAD_WORKER_ONSTACK(worker)				\
> -	struct kthread_worker worker = KTHREAD_WORKER_INIT_ONSTACK(worker)
> +# define KTHREAD_INIT_WORKER_ONSTACK(worker)				\
> +	({ kthread_init_worker(&worker); worker; })
> +# define KTHREAD_DECLARE_WORKER_ONSTACK(worker)				\
> +	struct kthread_worker worker = KTHREAD_INIT_WORKER_ONSTACK(worker)
>  #else
> -# define DEFINE_KTHREAD_WORKER_ONSTACK(worker) DEFINE_KTHREAD_WORKER(worker)
> +# define KTHREAD_DECLARE_WORKER_ONSTACK(worker) KTHREAD_DECLARE_WORKER(worker)
>  #endif

As Steven already said; these are very much definitions _not_
declarations.