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Message-ID: <20190626131318.GA5101@lst.de>
Date:   Wed, 26 Jun 2019 15:13:18 +0200
From:   Christoph Hellwig <hch@....de>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>, sparclinux@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

As that function is in code only there to provide compile coverage
something like this should fix the problem:


diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 547ff96fb228..1599de730532 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -861,10 +861,12 @@ static inline unsigned long pud_page_vaddr(pud_t pud)
 #define pud_clear(pudp)			(pud_val(*(pudp)) = 0UL)
 #define pgd_page_vaddr(pgd)		\
 	((unsigned long) __va(pgd_val(pgd)))
-#define pgd_page(pgd)			pfn_to_page(pgd_pfn(pgd))
 #define pgd_present(pgd)		(pgd_val(pgd) != 0U)
 #define pgd_clear(pgdp)			(pgd_val(*(pgdp)) = 0UL)
 
+/* only used by the stubbed out hugetlb gup code, should never be called */
+#define pgd_page(pgd)			NULL
+
 static inline unsigned long pud_large(pud_t pud)
 {
 	pte_t pte = __pte(pud_val(pud));

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