linux-kernel - Re: [RFC PATCH 01/13] arm: Fix mutual exclusion in arch

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Date:   Mon, 12 Nov 2018 00:34:22 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Finn Thain <fthain@...egraphics.com.au>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Stephen N Chivers <schivers@....com.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH 01/13] arm: Fix mutual exclusion in arch_gettimeoffset

On Mon, Nov 12, 2018 at 03:12:39PM +1100, Finn Thain wrote:
> Implementations of arch_gettimeoffset are generally not re-entrant
> and assume that interrupts have been disabled. Unfortunately this
> pre-condition got broken in v2.6.32.
> 
> Fixes: 5cfc8ee0bb51 ("ARM: convert arm to arch_gettimeoffset()")
> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>

This looks like a sensible fix for -stable backporting.  But with m68k
converted over it might be time for these two arm platforms to either
be converted to the clocksource API or to be dropped..