linux-kernel - Re: [PATCH v3] powerpc/64s/pgtable: fix an undefined behaviour

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Date:   Tue,  9 Jun 2020 15:28:34 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     mpe@...erman.id.au, Qian Cai <cai@....pw>
Cc:     linuxppc-dev@...ts.ozlabs.org, rashmicy@...il.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] powerpc/64s/pgtable: fix an undefined behaviour

On Thu, 5 Mar 2020 23:48:52 -0500, Qian Cai wrote:
> Booting a power9 server with hash MMU could trigger an undefined
> behaviour because pud_offset(p4d, 0) will do,
> 
> 0 >> (PAGE_SHIFT:16 + PTE_INDEX_SIZE:8 + H_PMD_INDEX_SIZE:10)
> 
> Fix it by converting pud_index() and friends to static inline
> functions.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/64s/pgtable: fix an undefined behaviour
      https://git.kernel.org/powerpc/c/c2e929b18cea6cbf71364f22d742d9aad7f4677a

cheers