linux-kernel - Re: [PATCH v2 1/3] hpsa: use __packed on individual structs, not header-wide

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Message-ID: <CAK8P3a2AgboydhpHLMNBzdoHKULtZ5HTH2bjh2tBUGdDiVKCEA@mail.gmail.com>
Date:   Tue, 30 Mar 2021 09:43:55 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Sergei Trofimovich <slyfox@...too.org>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Don Brace <don.brace@...rochip.com>,
        linux-ia64@...r.kernel.org, storagedev@...rochip.com,
        linux-scsi <linux-scsi@...r.kernel.org>, jszczype@...hat.com,
        Scott Benesh <scott.benesh@...rochip.com>,
        Scott Teel <scott.teel@...rochip.com>, thenzl@...hat.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/3] hpsa: use __packed on individual structs, not header-wide

On Tue, Mar 30, 2021 at 9:30 AM Arnd Bergmann <arnd@...nel.org> wrote:
> On Tue, Mar 30, 2021 at 9:22 AM Sergei Trofimovich <slyfox@...too.org> wrote:
>
> > @@ -451,7 +452,7 @@ struct CommandList {
> >         bool retry_pending;
> >         struct hpsa_scsi_dev_t *device;
> >         atomic_t refcount; /* Must be last to avoid memset in hpsa_cmd_init() */
> > -} __aligned(COMMANDLIST_ALIGNMENT);
> > +} __packed __aligned(COMMANDLIST_ALIGNMENT);
>
> You are still marking CommandList as __packed here, which is
> what caused the original problem. Please don't mark this one
> as __packed at all. If there are individual members that you want
> to be misaligned inside of the structure, you could mark those
> explicitly.

Nevermind, I just got patch 2/3, splitting up the patches like this seems
fine to me.

Whole series

Reviewed-by: Arnd Bergmann <arnd@...db.de>