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Message-ID: <alpine.DEB.2.21.1805061225550.1685@nanos.tec.linutronix.de>
Date: Sun, 6 May 2018 12:26:54 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
cc: linux-kernel@...r.kernel.org,
Mike Galbraith <umgwanakikbuti@...il.com>, x86@...nel.org,
Mike Galbraith <mgalbraith@...e.de>
Subject: Re: [PATCH] x86: UV: raw_spinlock conversion
On Fri, 4 May 2018, Sebastian Andrzej Siewior wrote:
> From: Mike Galbraith <umgwanakikbuti@...il.com>
>
> Shrug. Lots of hobbyists have a beast in their basement, right?
This hardly qualifies as a proper changelog ...
> }
> @@ -299,13 +299,17 @@ static int uv_rtc_unset_timer(int cpu, i
> static u64 uv_read_rtc(struct clocksource *cs)
> {
> unsigned long offset;
> + u64 cycles;
>
> + preempt_disable();
> if (uv_get_min_hub_revision_id() == 1)
> offset = 0;
> else
> offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
>
> - return (u64)uv_read_local_mmr(UVH_RTC | offset);
> + cycles = (u64)uv_read_local_mmr(UVH_RTC | offset);
> + preempt_enable();
> + return cycles;
And how exaclty is this hunk related?
Thanks,
tglx
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