linux-kernel - Re: [PATCH] powerpc/mm/book3s64/iommu: fix some RCU-list locks

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Message-Id: <161235200882.1516112.5579154052220245435.b4-ty@ellerman.id.au>
Date:   Wed,  3 Feb 2021 22:40:02 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     mpe@...erman.id.au, Qian Cai <cai@....pw>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        paulus@...ba.org, aik@...abs.ru, paulmck@...nel.org
Subject: Re: [PATCH] powerpc/mm/book3s64/iommu: fix some RCU-list locks

On Sun, 10 May 2020 01:15:59 -0400, Qian Cai wrote:
> It is safe to traverse mm->context.iommu_group_mem_list with either
> mem_list_mutex or the RCU read lock held. Silence a few RCU-list false
> positive warnings and fix a few missing RCU read locks.
> 
>  arch/powerpc/mm/book3s64/iommu_api.c:330 RCU-list traversed in non-reader section!!
> 
>  other info that might help us debug this:
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/mm/book3s64/iommu: fix some RCU-list locks
      https://git.kernel.org/powerpc/c/b5952f8125ae512420d5fc569adce591bea73bf5

cheers