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From:   Steven Price <steven.price@arm.com>
To:     linux-mm@kvack.org
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        Andy Lutomirski <luto@kernel.org>,
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        Matt Turner <mattst88@gmail.com>
Subject: [PATCH v3 01/34] alpha: mm: Add p?d_large() definitions
Date:   Wed, 27 Feb 2019 17:05:35 +0000
Message-Id: <20190227170608.27963-2-steven.price@arm.com>
In-Reply-To: <20190227170608.27963-1-steven.price@arm.com>
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walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information will be provided by the
p?d_large() functions/macros.

For alpha, we don't support huge pages, so add stubs returning 0.

CC: linux-alpha@vger.kernel.org
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/alpha/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h
index 89c2032f9960..e5726d3a3200 100644
--- a/arch/alpha/include/asm/pgtable.h
+++ b/arch/alpha/include/asm/pgtable.h
@@ -254,11 +254,13 @@ extern inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
 extern inline int pmd_none(pmd_t pmd)		{ return !pmd_val(pmd); }
 extern inline int pmd_bad(pmd_t pmd)		{ return (pmd_val(pmd) & ~_PFN_MASK) != _PAGE_TABLE; }
 extern inline int pmd_present(pmd_t pmd)	{ return pmd_val(pmd) & _PAGE_VALID; }
+extern inline int pmd_large(pmd_t pmd)		{ return 0; }
 extern inline void pmd_clear(pmd_t * pmdp)	{ pmd_val(*pmdp) = 0; }
 
 extern inline int pgd_none(pgd_t pgd)		{ return !pgd_val(pgd); }
 extern inline int pgd_bad(pgd_t pgd)		{ return (pgd_val(pgd) & ~_PFN_MASK) != _PAGE_TABLE; }
 extern inline int pgd_present(pgd_t pgd)	{ return pgd_val(pgd) & _PAGE_VALID; }
+extern inline int pgd_large(pgd_t pgd)		{ return 0; }
 extern inline void pgd_clear(pgd_t * pgdp)	{ pgd_val(*pgdp) = 0; }
 
 /*
-- 
2.20.1