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From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 11 Dec 2017 11:25:09 +0100
Message-ID: <CACRpkdaKZk5N9F=_nYSzKWyXgW4xQ9Ltft7-UNM+a-nOpqq2xg@mail.gmail.com>
Subject: Re: [PATCH 1/6] ARM: stm32: prepare stm32 family to welcome armv7 architecture
To: Ludovic Barre <ludovic.Barre@st.com>
Cc: Russell King <linux@armlinux.org.uk>, Rob Herring <robh+dt@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>
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On Fri, Dec 8, 2017 at 3:11 PM, Ludovic Barre <ludovic.Barre@st.com> wrote:

> From: Ludovic Barre <ludovic.barre@st.com>
>
> This patch prepares the STM32 machine for the integration of Cortex-A
> based microprocessor (MPU), on top of the existing Cortex-M
> microcontroller family (MCU). Since both MCUs and MPUs are sharing
> common hardware blocks we can keep using ARCH_STM32 flag for most of
> them. If a hardware block is specific to one family we can use either
> ARCH_STM32_MCU or ARCH_STM32_MPU flag.
>
> Signed-off-by: Ludovic Barre <ludovic.barre@st.com>

So yesterdays application processors are todays MCU processors.

I said this on a lecture for control systems a while back and
stated it as a reason I think RTOSes are not really seeing a bright
future compared to Linux.

It happened quicker than I thought though, interesting.

Yours,
Linus Walleij