linux-kernel - Re: [1/1] : powerpc: block interrupts when updating TIDR

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Date:   Mon, 29 Jan 2018 15:13:47 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:     felix@...ux.vnet.ibm.com, linuxppc-dev@...abs.org,
        clombard@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        vaibhav@...ux.vnet.ibm.com
Subject: Re: [1/1] : powerpc: block interrupts when updating TIDR

On Fri, 2017-12-01 at 21:31:40 UTC, Sukadev Bhattiprolu wrote:
> From: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
> Date: Tue, 28 Nov 2017 13:39:43 -0600
> Subject: [PATCH 1/1]: powerpc: block interrupts when updating TIDR
> 
> clear_thread_tidr() is called in interrupt context as a part of delayed
> put of the task structure (i.e as a part of timer interrupt). To prevent
> a deadlock, block interrupts when holding vas_thread_id_lock to set/
> clear TIDR for a task.
> 
> Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/384dfd627f1ee67d028e6f14c6e9bf

cheers