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Message-ID: <20240304200547.GA10314@vamoiridPC>
Date: Mon, 4 Mar 2024 21:05:47 +0100
From: Vasileios Amoiridis <vassilisamir@...il.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Vasileios Amoiridis <vassilisamir@...il.com>, jic23@...nel.org,
lars@...afoo.de, ang.iglesiasg@...il.com, mazziesaccount@...il.com,
ak@...klinger.de, petre.rodan@...dimension.ro, phil@...pberrypi.com,
579lpy@...il.com, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] iio: pressure: Add triggered buffer support for
BMP280 driver
On Mon, Mar 04, 2024 at 09:18:27PM +0200, Andy Shevchenko wrote:
> On Mon, Mar 04, 2024 at 08:08:38PM +0100, Vasileios Amoiridis wrote:
> > On Mon, Mar 04, 2024 at 01:52:05PM +0200, Andy Shevchenko wrote:
> > > On Sun, Mar 03, 2024 at 05:53:00PM +0100, Vasileios Amoiridis wrote:
>
> ...
>
> > > > + struct {
> > > > + s32 temperature;
> > > > + u32 pressure;
> > > > + u32 humidity;
> > >
> > > > + s64 timestamp;
> > >
> > > Shouldn't this be aligned properly?
> >
> > I saw that in some drivers it was added and in some it was not. What is the
> > difference of aligning just the timestamp of the kernel?
>
> You can count yourself. With provided structure as above there is a high
> probability of misaligned timeout field. The latter has to be aligned on
> 8 bytes.
>
I was unaware, but now I am not. Thank you very much for the feedback.
> > > > + } iio_buffer;
>
> --
> With Best Regards,
> Andy Shevchenko
>
>
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