1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5b85ffc2760c..1f3e9100164d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1202,6 +1202,34 @@ static __always_inline vma_flags_t vma_flags_diff_pair(const vma_flags_t *flags,
 	return dst;
 }
 
+/* Determine if flags and flags_other have precisely the same flags set. */
+static __always_inline bool vma_flags_same_pair(const vma_flags_t *flags,
+						const vma_flags_t *flags_other)
+{
+	const unsigned long *bitmap = flags->__vma_flags;
+	const unsigned long *bitmap_other = flags_other->__vma_flags;
+
+	return bitmap_equal(bitmap, bitmap_other, NUM_VMA_FLAG_BITS);
+}
+
+/* Determine if flags and flags_other have precisely the same flags set.  */
+static __always_inline bool vma_flags_same_mask(const vma_flags_t *flags,
+						vma_flags_t flags_other)
+{
+	const unsigned long *bitmap = flags->__vma_flags;
+	const unsigned long *bitmap_other = flags_other.__vma_flags;
+
+	return bitmap_equal(bitmap, bitmap_other, NUM_VMA_FLAG_BITS);
+}
+
+/*
+ * Helper macro to determine if only the specific flags are set, e.g.:
+ *
+ * if (vma_flags_same(&flags, VMA_WRITE_BIT) { ... }
+ */
+#define vma_flags_same(flags, ...) \
+	vma_flags_same_mask(flags, mk_vma_flags(__VA_ARGS__))
+
 /*
  * Helper to test that ALL specified flags are set in a VMA.
  *