linux-kernel - Re: linux-next: fix ups for clashes between akpm and powerpc trees

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Message-ID: <20200604212214.636fb3b3@canb.auug.org.au>
Date:   Thu, 4 Jun 2020 21:22:14 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: linux-next: fix ups for clashes between akpm and powerpc trees

Hi all,

On Thu, 4 Jun 2020 17:49:25 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> diff --cc arch/powerpc/include/asm/nohash/32/pgtable.h
> index 639f3b3713ec,eb8538c85077..1927e1b653f2
> --- a/arch/powerpc/include/asm/nohash/32/pgtable.h
> +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
> @@@ -342,15 -334,6 +337,10 @@@ static inline int pte_young(pte_t pte
>   	pfn_to_page((__pa(pmd_val(pmd)) >> PAGE_SHIFT))
>   #endif
>   
> - /* Find an entry in the third-level page table.. */
> - #define pte_index(address)		\
> - 	(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
>  +#define pte_offset_kernel(dir, addr)	\
>  +	(pmd_bad(*(dir)) ? NULL : (pte_t *)pmd_page_vaddr(*(dir)) + \
>  +				  pte_index(addr))
> - #define pte_offset_map(dir, addr)	pte_offset_kernel((dir), (addr))
> - static inline void pte_unmap(pte_t *pte) { }
>  +
>   /*
>    * Encode and decode a swap entry.
>    * Note that the bits we use in a PTE for representing a swap entry

I have added this hunk (sort of - see below) to linux-next for tomorrow
as a fix for mm-consolidate-pte_index-and-pte_offset_-definitions.

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Thu, 4 Jun 2020 21:16:19 +1000
Subject: [PATCH] mm-consolidate-pte_index-and-pte_offset_-definitions-fix

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 arch/powerpc/include/asm/nohash/32/pgtable.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index c188a6f64bcd..d94bcd117c5b 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -341,6 +341,10 @@ static inline int pte_young(pte_t pte)
 	pfn_to_page((__pa(pmd_val(pmd)) >> PAGE_SHIFT))
 #endif
 
+#define pte_offset_kernel(dir, addr)	\
+	(pmd_bad(*(dir)) ? NULL : (pte_t *)pmd_page_vaddr(*(dir)) + \
+				  pte_index(addr))
+
 /*
  * Encode and decode a swap entry.
  * Note that the bits we use in a PTE for representing a swap entry
-- 
2.27.0.rc2

-- 
Cheers,
Stephen Rothwell

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