ACPI: fix acpi_find_child_device() invocation in acpi_preset_companion()

[mirror_ubuntu-bionic-kernel.git] / include / linux / mm_types.h

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index a23e43fee137870551c5f652b42305d122257047..ed4c7a653fd7633cfb19b5b486678103b3c7b740 100644 (file)
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -242,6 +242,11 @@ struct page_frag_cache {
 
 typedef unsigned long vm_flags_t;
 
+static inline atomic_t *compound_mapcount_ptr(struct page *page)
+{
+       return &page[1].compound_mapcount;
+}
+
 /*
  * A region containing a mapping of a non-memory backed file under NOMMU
  * conditions.  These are held in a global tree and are pinned by the VMAs that