The patch titled
Subject: mm-fix-vma_is_anonymous-false-positives-fix
has been added to the -mm tree. Its filename is
mm-fix-vma_is_anonymous-false-positives-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fix-vma_is_anonymous-false-positives-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fix-vma_is_anonymous-false-positives-fix.patch
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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Subject: mm-fix-vma_is_anonymous-false-positives-fix
add comments
Link: http://lkml.kernel.org/r/20180711121521.omugjfpuuyxscjjf@kshutemo-mobl1
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff -puN mm/mmap.c~mm-fix-vma_is_anonymous-false-positives-fix mm/mmap.c
--- a/mm/mmap.c~mm-fix-vma_is_anonymous-false-positives-fix
+++ a/mm/mmap.c
@@ -71,7 +71,16 @@ int mmap_rnd_compat_bits __read_mostly =
static bool ignore_rlimit_data;
core_param(ignore_rlimit_data, ignore_rlimit_data, bool, 0644);
+/*
+ * All anonymous VMAs have ->vm_ops set to anon_vm_ops.
+ * vma_is_anonymous() reiles on anon_vm_ops to detect anonymous VMA.
+ */
const struct vm_operations_struct anon_vm_ops = {};
+
+/*
+ * All VMAs have to have ->vm_ops set. dummy_vm_ops can be used if the VMA
+ * doesn't need to handle any of the operations.
+ */
const struct vm_operations_struct dummy_vm_ops = {};
static void unmap_region(struct mm_struct *mm,
_
Patches currently in -mm which might be from kirill@xxxxxxxxxxxxx are
mm-fix-vma_is_anonymous-false-positives-fix.patch
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