linux-kernel - linux-next: build failure after merge of the akpm-current tree

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Date:   Wed, 26 Jun 2019 22:58:07 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: linux-next: build failure after merge of the akpm-current tree

Hi all,

After merging the akpm tree, today's linux-next build (sparc64 defconfig)
failed like this:

In file included from arch/sparc/include/asm/page_64.h:130:0,
                 from arch/sparc/include/asm/page.h:8,
                 from arch/sparc/include/asm/thread_info_64.h:27,
                 from arch/sparc/include/asm/thread_info.h:5,
                 from include/linux/thread_info.h:38,
                 from include/asm-generic/preempt.h:5,
                 from ./arch/sparc/include/generated/asm/preempt.h:1,
                 from include/linux/preempt.h:78,
                 from include/linux/spinlock.h:51,
                 from mm/gup.c:5:
mm/gup.c: In function 'gup_huge_pgd':
arch/sparc/include/asm/pgtable_64.h:864:37: error: implicit declaration of function 'pgd_pfn'; did you mean 'pud_pfn'? [-Werror=implicit-function-declaration]
 #define pgd_page(pgd)   pfn_to_page(pgd_pfn(pgd))
                                     ^
include/asm-generic/memory_model.h:54:40: note: in definition of macro '__pfn_to_page'
 #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                        ^~~
mm/gup.c:2147:9: note: in expansion of macro 'pgd_page'
  page = pgd_page(orig) + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
         ^~~~~~~~

Caused by commit

  51bbf54b3f26 ("sparc64: add the missing pgd_page definition")

I don't see a simple way to fix this, so sparc64 is broken for today :-(
-- 
Cheers,
Stephen Rothwell

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