linux-kernel - Re: [PATCH linux-5.2.y-rt only] hrtimer: correct the logic for grab expiry lock

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Message-ID: <86790e56-9cec-5cea-8387-f7010b88708b@prevas.dk>
Date:   Wed, 12 Aug 2020 13:45:02 +0200
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     zhantao.tang@...driver.com, linux-kernel@...r.kernel.org
Cc:     bigeasy@...utronix.de, tglx@...utronix.de, rostedt@...dmis.org,
        linux-rt-users@...r.kernel.org
Subject: Re: [PATCH linux-5.2.y-rt only] hrtimer: correct the logic for grab
 expiry lock

On 12/08/2020 12.50, zhantao.tang@...driver.com wrote:
> From: Zhantao Tang <zhantao.tang@...driver.com>
> 
> In commit: 47b6de0b7f22 ("hrtimer: Add a missing bracket and hide `migration_base' on !SMP")
> a inline function is_migration_base() is introduced. But
> the logic of the hrtimer_grab_expiry_lock was changed.
> 
> This patch is to correct it.
> 

Yup, same patch sent back in April, which also had a fixes tag for 5.2.

https://lore.kernel.org/lkml/20200428144026.5882-1-rasmus.villemoes@prevas.dk/

It got picked up for 4.19-rt, dunno why it wasn't for 5.2-rt.

Rasmus