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From: Ingo Molnar <mingo@kernel.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Will Deacon <will@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"Paul E . McKenney" <paulmck@kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Matthew Wilcox <willy@infradead.org>,
	Mike Galbraith <umgwanakikbuti@gmail.com>,
	Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Subject: Re: [PATCH v2 7/7] zram: Use local lock to protect per-CPU data
Date: Mon, 25 May 2020 09:26:48 +0200	[thread overview]
Message-ID: <20200525072648.GF329373@gmail.com> (raw)
In-Reply-To: <20200524215739.551568-8-bigeasy@linutronix.de>


* Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote:

> --- a/drivers/block/zram/zcomp.h
> +++ b/drivers/block/zram/zcomp.h
> @@ -5,11 +5,13 @@
>  
>  #ifndef _ZCOMP_H_
>  #define _ZCOMP_H_
> +#include <linux/locallock.h>
>  
>  struct zcomp_strm {
>  	/* compression/decompression buffer */
>  	void *buffer;
>  	struct crypto_comp *tfm;
> +	struct local_lock lock;
>  };

I believe the general pattern is to put the lock in front of the 
fields it protects.

I'd also add a comment documenting that both fields ->buffer and ->tfm 
are protected by the lock.

Thanks,

	Ingo

  reply	other threads:[~2020-05-25  7:26 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-24 21:57 [PATCH 0/7 v2] Introduce local_lock() Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 1/7] locking: " Sebastian Andrzej Siewior
2020-05-25  7:01   ` Ingo Molnar
2020-05-25  7:12     ` Ingo Molnar
2020-05-25 11:27       ` Sebastian Andrzej Siewior
2020-05-25 11:26     ` Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 2/7] radix-tree: Use local_lock for protection Sebastian Andrzej Siewior
2020-05-25  6:29   ` Ingo Molnar
2020-05-25 11:11     ` Matthew Wilcox
2020-05-25 13:26       ` Ingo Molnar
2020-05-25 11:17     ` Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 3/7] mm/swap: " Sebastian Andrzej Siewior
2020-05-25  6:44   ` Ingo Molnar
2020-05-25 17:07     ` Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 4/7] squashfs: make use of local lock in multi_cpu decompressor Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 5/7] connector/cn_proc: Protect send_msg() with a local lock Sebastian Andrzej Siewior
2020-05-25  7:18   ` Ingo Molnar
2020-05-25 14:51     ` Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 6/7] zram: Allocate struct zcomp_strm as per-CPU memory Sebastian Andrzej Siewior
2020-05-25  7:24   ` Ingo Molnar
2020-05-25 16:50     ` Sebastian Andrzej Siewior
2020-05-24 21:57 ` [PATCH v2 7/7] zram: Use local lock to protect per-CPU data Sebastian Andrzej Siewior
2020-05-25  7:26   ` Ingo Molnar [this message]
2020-05-25 16:51     ` Sebastian Andrzej Siewior

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