From: Lukas Wunner <lukas@wunner.de>
To: Christoph Hellwig <hch@infradead.org>
Cc: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>,
linux-pci@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Bjorn Helgaas <bhelgaas@google.com>,
Dan Williams <dan.j.williams@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ilpo Jarvinen <ilpo.jarvinen@linux.intel.com>,
Keith Busch <kbusch@kernel.org>, Marek Behun <marek.behun@nic.cz>,
Pavel Machek <pavel@ucw.cz>, Randy Dunlap <rdunlap@infradead.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Stuart Hayes <stuart.w.hayes@gmail.com>
Subject: Re: [PATCH v3 3/3] PCI/NPEM: Add _DSM PCIe SSD status LED management
Date: Fri, 5 Jul 2024 16:07:59 +0200 [thread overview]
Message-ID: <Zof-P7jNmoLvJTF-@wunner.de> (raw)
In-Reply-To: <ZofvZyzIe_7tH6zZ@infradead.org>
On Fri, Jul 05, 2024 at 06:04:39AM -0700, Christoph Hellwig wrote:
> > +struct dsm_output {
> > + u16 status;
> > + u8 function_specific_err;
> > + u8 vendor_specific_err;
> > + u32 state;
> > +} __packed;
>
> This structure is naturally aligned, so no need for the __packed.
Isn't the compiler free to insert padding wherever it sees fit?
structs passed to ACPI firmware would no longer comply with the
spec-prescribed layout then and declaring them __packed seems to be
the only way to ensure that doesn't happen.
Thanks,
Lukas
next prev parent reply other threads:[~2024-07-05 14:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-05 12:54 [PATCH v3 0/3] PCIe Enclosure LED Management Mariusz Tkaczyk
2024-07-05 12:54 ` [PATCH v3 1/3] leds: Init leds class earlier Mariusz Tkaczyk
2024-07-05 12:58 ` Christoph Hellwig
2024-07-05 12:54 ` [PATCH v3 2/3] PCI/NPEM: Add Native PCIe Enclosure Management support Mariusz Tkaczyk
2024-07-05 13:02 ` Christoph Hellwig
2024-07-05 13:22 ` Mariusz Tkaczyk
2024-07-05 13:29 ` Christoph Hellwig
2024-07-08 11:33 ` Ilpo Järvinen
2024-07-08 14:24 ` Mariusz Tkaczyk
2024-07-08 16:13 ` Ilpo Järvinen
2024-07-08 14:27 ` Lukas Wunner
2024-07-05 12:54 ` [PATCH v3 3/3] PCI/NPEM: Add _DSM PCIe SSD status LED management Mariusz Tkaczyk
2024-07-05 13:04 ` Christoph Hellwig
2024-07-05 14:07 ` Lukas Wunner [this message]
2024-07-08 10:14 ` Christoph Hellwig
2024-07-08 11:39 ` Ilpo Järvinen
2024-07-05 19:11 ` [PATCH v3 0/3] PCIe Enclosure LED Management stuart hayes
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