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From:   Steven Price <steven.price@arm.com>
To:     linux-mm@kvack.org
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        linux-xtensa@linux-xtensa.org
Subject: [PATCH v3 23/34] xtensa: mm: Add p?d_large() definitions
Date:   Wed, 27 Feb 2019 17:05:57 +0000
Message-Id: <20190227170608.27963-24-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 is provided by the
p?d_large() functions/macros.

For xtensa, we don't support large pages, so add a stub returning 0.

CC: Chris Zankel <chris@zankel.net>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: linux-xtensa@linux-xtensa.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/xtensa/include/asm/pgtable.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 29cfe421cf41..60c3e86b9782 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -266,6 +266,7 @@ static inline void pgtable_cache_init(void) { }
 #define pmd_none(pmd)	 (!pmd_val(pmd))
 #define pmd_present(pmd) (pmd_val(pmd) & PAGE_MASK)
 #define pmd_bad(pmd)	 (pmd_val(pmd) & ~PAGE_MASK)
+#define pmd_large(pmd)	 (0)
 #define pmd_clear(pmdp)	 do { set_pmd(pmdp, __pmd(0)); } while (0)
 
 static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITABLE; }
-- 
2.20.1