linux-kernel - [PATCH v3 22/34] unicore32: mm: Add p?d

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Date:   Wed, 27 Feb 2019 17:05:56 +0000
From:   Steven Price <steven.price@....com>
To:     linux-mm@...ck.org
Cc:     Steven Price <steven.price@....com>,
        Andy Lutomirski <luto@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        James Morse <james.morse@....com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will.deacon@....com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Rutland <Mark.Rutland@....com>,
        "Liang, Kan" <kan.liang@...ux.intel.com>,
        Guan Xuetao <gxt@....edu.cn>
Subject: [PATCH v3 22/34] unicore32: mm: Add p?d_large() definitions

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 unicore32, we don't support large pages, so add a stub returning 0.

CC: Guan Xuetao <gxt@....edu.cn>
Signed-off-by: Steven Price <steven.price@....com>
---
 arch/unicore32/include/asm/pgtable.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/unicore32/include/asm/pgtable.h b/arch/unicore32/include/asm/pgtable.h
index a4f2bef37e70..b45429df8b99 100644
--- a/arch/unicore32/include/asm/pgtable.h
+++ b/arch/unicore32/include/asm/pgtable.h
@@ -209,6 +209,7 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
 #define pmd_bad(pmd)		(((pmd_val(pmd) &		\
 				(PMD_PRESENT | PMD_TYPE_MASK))	\
 				!= (PMD_PRESENT | PMD_TYPE_TABLE)))
+#define pmd_large(pmd)		(0)
 
 #define set_pmd(pmdpd, pmdval)		\
 	do {				\
-- 
2.20.1