linux-kernel - [RFC PATCH 11/24] mm/hugetlb: Add vmemmap_pmd

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Message-Id: <20200915125947.26204-12-songmuchun@bytedance.com>
Date:   Tue, 15 Sep 2020 20:59:34 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     corbet@....net, mike.kravetz@...cle.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        viro@...iv.linux.org.uk, akpm@...ux-foundation.org,
        paulmck@...nel.org, mchehab+huawei@...nel.org,
        pawan.kumar.gupta@...ux.intel.com, rdunlap@...radead.org,
        oneukum@...e.com, anshuman.khandual@....com, jroedel@...e.de,
        almasrymina@...gle.com, rientjes@...gle.com
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        Muchun Song <songmuchun@...edance.com>
Subject: [RFC PATCH 11/24] mm/hugetlb: Add vmemmap_pmd_huge macro for x86

Use pmd_large instead of pmd_huge on x86, so we implement the
vmemmap_pmd_huge macro.

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 arch/x86/include/asm/hugetlb.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index f5e882f999cd..7c3eb60c2198 100644
--- a/arch/x86/include/asm/hugetlb.h
+++ b/arch/x86/include/asm/hugetlb.h
@@ -4,10 +4,17 @@
 
 #include <asm/page.h>
 #include <asm-generic/hugetlb.h>
+#include <asm/pgtable.h>
 
 #ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
 #define VMEMMAP_HPAGE_SHIFT			PMD_SHIFT
 #define arch_vmemmap_support_huge_mapping()	boot_cpu_has(X86_FEATURE_PSE)
+
+#define vmemmap_pmd_huge vmemmap_pmd_huge
+static inline bool vmemmap_pmd_huge(pmd_t *pmd)
+{
+	return pmd_large(*pmd);
+}
 #endif
 
 #define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE)
-- 
2.20.1