disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/rmap.h
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@@ -42,13 +42,7 @@
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 	 */
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 	atomic_t refcount;
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-	/*
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-	 * Count of child anon_vmas and VMAs which points to this anon_vma.
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-	 *
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-	 * This counter is used for making decision about reusing anon_vma
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-	 * instead of forking new one. See comments in function anon_vma_clone.
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-	 */
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-	unsigned degree;
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+	unsigned degree;		/* ANDROID: KABI preservation, DO NOT USE! */
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 	struct anon_vma *parent;	/* Parent of this anon_vma */
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..
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@@ -63,6 +57,25 @@
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 	/* Interval tree of private "related" vmas */
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 	struct rb_root_cached rb_root;
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+
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+	/*
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+	 * ANDROID: KABI preservation, it's safe to put these at the end of this structure as it's
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+	 * only passed by a pointer everywhere, the size and internal structures are local to the
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+	 * core kernel.
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+	 */
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+#ifndef __GENKSYMS__
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+	/*
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+	 * Count of child anon_vmas. Equals to the count of all anon_vmas that
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+	 * have ->parent pointing to this one, including itself.
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+	 *
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+	 * This counter is used for making decision about reusing anon_vma
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+	 * instead of forking new one. See comments in function anon_vma_clone.
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+	 */
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+	unsigned long num_children;
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+	/* Count of VMAs whose ->anon_vma pointer points to this object. */
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+	unsigned long num_active_vmas;
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+#endif
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+
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 };
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 /*