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Date:   Sat, 31 Oct 2020 12:25:28 +0100
From:   Peter Zijlstra <>
To:     Mike Galbraith <>
Cc:     lkml <>
Subject: Re: ltp::mmap05  -->  BUG: using __this_cpu_read() in preemptible

Hi Mike, good to see you're enjoying retirement ;-)

On Sat, Oct 31, 2020 at 06:52:40AM +0100, Mike Galbraith wrote:
> [  138.620544] BUG: using __this_cpu_read() in preemptible [00000000] code: mmap05/4858
> [  138.620737] caller is lockdep_hardirqs_on_prepare+0x2f/0x1b0

Fix should already be in tip/locking/urgent.

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