linux-kernel - Re: [PATCH 7/8] zram: Use local lock to protect per-CPU data

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Message-ID: <20200520110703.GJ317569@hirez.programming.kicks-ass.net>
Date:   Wed, 20 May 2020 13:07:03 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mike Galbraith <umgwanakikbuti@...il.com>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCH 7/8] zram: Use local lock to protect per-CPU data

On Tue, May 19, 2020 at 10:19:11PM +0200, Sebastian Andrzej Siewior wrote:
> +static DEFINE_LOCAL_LOCK(zcomp_lock);
> +
>  struct zcomp_strm *zcomp_stream_get(struct zcomp *comp)
>  {
> -	return *get_cpu_ptr(comp->stream);
> +	local_lock(zcomp_lock);
> +	return *this_cpu_ptr(comp->stream);
>  }

put it in struct czomp_strm ?