linux-kernel - Re: [PATCH 3/4] scsi: pm8001: Use non-atomic bitmap ops for tag alloc + free

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Message-ID: <CAMGffEm8qgRzs8epMgBiJ-Ma2AGEynwXc0dSTB8k5cj2+1GhCA@mail.gmail.com>
Date:   Mon, 20 Jun 2022 08:53:00 +0200
From:   Jinpu Wang <jinpu.wang@...os.com>
To:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Cc:     Hannes Reinecke <hare@...e.de>, John Garry <john.garry@...wei.com>,
        jinpu.wang@...os.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ajish.Koshy@...rochip.com
Subject: Re: [PATCH 3/4] scsi: pm8001: Use non-atomic bitmap ops for tag alloc
 + free

>
> After the patch, spinlock guarantees atomicity for both alloc and free.
>
> Not sure there is any gain from this.
+1