linux-kernel - Re: [PATCH v2 07/15] parisc: use legacy_timer

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Message-ID: <CAK8P3a0dPxWu6obX6jca8TsDQw6xsBmrihu8oH0TxR-BxYV3vw@mail.gmail.com>
Date:   Fri, 30 Oct 2020 20:33:41 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Helge Deller <deller@....de>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Finn Thain <fthain@...egraphics.com.au>,
        Philip Blundell <philb@....org>,
        Joshua Thompson <funaho@...ai.org>,
        Sam Creasey <sammy@...my.net>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-ia64@...r.kernel.org,
        Parisc List <linux-parisc@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 07/15] parisc: use legacy_timer_tick

On Fri, Oct 30, 2020 at 6:13 PM Helge Deller <deller@....de> wrote:
>
> On 10/30/20 4:17 PM, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@...db.de>
> >
> > parisc has selected CONFIG_GENERIC_CLOCKEVENTS since commit 43b1f6abd590
> > ("parisc: Switch to generic sched_clock implementation"), but does not
> > appear to actually be using it, and instead calls the low-level
> > timekeeping functions directly.
>
> Arnd, thank you for this patch!
> It reminded me that I really missed to fully implement the clockevents on parisc!
>
> Your other patch ("RFC: m68k: mac: convert to generic clockevent")
> was a big help too, as it showed how it might work on parisc as well.
>
> Here is now a current version of the clockevents-enabling-patch for parisc:
> https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/commit/?h=for-next&id=3b7ab4a74a2d1972dbeb33285d85f1500b2ff96a

Ah, nice!

> > Remove the GENERIC_CLOCKEVENTS select again, and instead convert to
> > the newly added legacy_timer_tick() helper.
>
> My patch still needs more testing, but if it turns to work
> out right, would you mind to drop your patch for parisc?

I think it would be easier if you could base your patch on top of
my series, as they would otherwise inevitably conflict. I could either
add it to my tree, or you could merge my branch into your tree.

      Arnd