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From:   Alexander Dahl <ada@thorsis.com>
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     Julien Grall <julien.grall@arm.com>,
        linux-rt-users@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [ANNOUNCE] v5.2.10-rt5
Date:   Tue, 27 Aug 2019 16:26:20 +0200
Message-ID: <1983406.XYedcDVy8E@ada>
In-Reply-To: <20190827132200.uj44quypjsqu3oup@linutronix.de>
References: <20190827105542.qxvtteirkh55i5ly@linutronix.de> <1775495.KgcFvHdtex@ada> <20190827132200.uj44quypjsqu3oup@linutronix.de>
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Hello Sebastian,

Am Dienstag, 27. August 2019, 15:22:01 CEST schrieb Sebastian Andrzej Siewior:
> of course, !SMP. What about this:
> 
> diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
> --- a/kernel/time/hrtimer.c
> +++ b/kernel/time/hrtimer.c
> @@ -934,7 +934,11 @@ void hrtimer_grab_expiry_lock(const struct hrtimer
> *timer) {
>  	struct hrtimer_clock_base *base = READ_ONCE(timer->base);
> 
> +#ifdef CONFIG_SMP
>  	if (timer->is_soft && base != &migration_base) {
> +#else
> +	if (timer->is_soft && base && base->cpu_base) {
> +#endif
>  		spin_lock(&base->cpu_base->softirq_expiry_lock);
>  		spin_unlock(&base->cpu_base->softirq_expiry_lock);
>  	}

Build error is gone and target system boots successfully, seems to work fine 
at first sight. Thanks for the quick response.

Greets
Alex