linux-kernel - Re: [PATCH] powerpc/fixmap: Fix VM debug warning on unmap

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Message-Id: <164345486523.1545234.1636640296413408216.b4-ty@ellerman.id.au>
Date:   Sat, 29 Jan 2022 22:14:25 +1100
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Maxime Bizon <mbizon@...ebox.fr>
Subject: Re: [PATCH] powerpc/fixmap: Fix VM debug warning on unmap

On Mon, 6 Dec 2021 11:11:51 +0000, Christophe Leroy wrote:
> Unmapping a fixmap entry is done by calling __set_fixmap()
> with FIXMAP_PAGE_CLEAR as flags.
> 
> Today, powerpc __set_fixmap() calls map_kernel_page().
> 
> map_kernel_page() is not happy when called a second time
> for the same page.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/fixmap: Fix VM debug warning on unmap
      https://git.kernel.org/powerpc/c/aec982603aa8cc0a21143681feb5f60ecc69d718

cheers