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authorAnshuman Khandual <anshuman.khandual@arm.com>2020-04-02 07:07:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 19:35:29 +0300
commit7969f2264f92871b9879796f08b455f737373718 (patch)
treeaebb03aa114e62b8457041668553a9d48ac103a2 /include/linux/mm.h
parentb44437723cbcb5acd64ed25a4938b95fbb9bfccb (diff)
downloadlinux-7969f2264f92871b9879796f08b455f737373718.tar.xz
mm/vma: make vma_is_foreign() available for general use
Idea of a foreign VMA with respect to the present context is very generic. But currently there are two identical definitions for this in powerpc and x86 platforms. Lets consolidate those redundant definitions while making vma_is_foreign() available for general use later. This should not cause any functional change. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Link: http://lkml.kernel.org/r/1582782965-3274-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 18583629d424..083e66f80709 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -27,6 +27,7 @@
#include <linux/memremap.h>
#include <linux/overflow.h>
#include <linux/sizes.h>
+#include <linux/sched.h>
struct mempolicy;
struct anon_vma;
@@ -543,6 +544,16 @@ static inline bool vma_is_anonymous(struct vm_area_struct *vma)
return !vma->vm_ops;
}
+static inline bool vma_is_foreign(struct vm_area_struct *vma)
+{
+ if (!current->mm)
+ return true;
+
+ if (current->mm != vma->vm_mm)
+ return true;
+
+ return false;
+}
#ifdef CONFIG_SHMEM
/*
* The vma_is_shmem is not inline because it is used only by slow