linux-kernel - [PATCH 1/3] mm/vma: Move VM_NO_KHUGEPAGED into generic header

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Message-Id: <1582692658-3294-2-git-send-email-anshuman.khandual@arm.com>
Date:   Wed, 26 Feb 2020 10:20:56 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-mm@...ck.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] mm/vma: Move VM_NO_KHUGEPAGED into generic header

Move VM_NO_KHUGEPAGED into generic header (include/linux/mm.h). This just
makes sure that no VMA flag is scattered in individual function files any
longer. While at this, fix an old comment which is no longer valid.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 include/linux/mm.h | 3 ++-
 mm/khugepaged.c    | 2 --
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 52269e56c514..6f7e400e6ea3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -287,6 +287,8 @@ extern unsigned int kobjsize(const void *objp);
 #define VM_NOHUGEPAGE	0x40000000	/* MADV_NOHUGEPAGE marked this vma */
 #define VM_MERGEABLE	0x80000000	/* KSM may merge identical pages */
 
+#define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB)
+
 #ifdef CONFIG_ARCH_USES_HIGH_VMA_FLAGS
 #define VM_HIGH_ARCH_BIT_0	32	/* bit only usable on 64-bit architectures */
 #define VM_HIGH_ARCH_BIT_1	33	/* bit only usable on 64-bit architectures */
@@ -356,7 +358,6 @@ extern unsigned int kobjsize(const void *objp);
 
 /*
  * Special vmas that are non-mergable, non-mlock()able.
- * Note: mm/huge_memory.c VM_NO_THP depends on this definition.
  */
 #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP)
 
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index b679908743cb..494443628850 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -308,8 +308,6 @@ struct attribute_group khugepaged_attr_group = {
 };
 #endif /* CONFIG_SYSFS */
 
-#define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB)
-
 int hugepage_madvise(struct vm_area_struct *vma,
 		     unsigned long *vm_flags, int advice)
 {
-- 
2.20.1