diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 3c545b48aeabdd177a09920fceda7b550baae54d..8304959ad33641b892f05fb216466b691b871caa 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -360,6 +360,9 @@ static inline void ClearPageCompound(struct page *page)
 	ClearPageHead(page);
 }
 #endif
+
+#define PG_head_mask ((1L << PG_head))
+
 #else
 /*
  * Reduce page flag use as much as possible by overlapping
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 6748688813d0684f4357e02150087a6d83d90a7c..369f41a9412481029354034d4c6e0193fe132f56 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1617,6 +1617,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 #ifdef CONFIG_MEMORY_FAILURE
 	VMCOREINFO_NUMBER(PG_hwpoison);
 #endif
+	VMCOREINFO_NUMBER(PG_head_mask);
 	VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
 
 	arch_crash_save_vmcoreinfo();