1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/poison.h b/include/linux/poison.h
index 2110a81c5e2a..34066ffd893d 100644
--- a/include/linux/poison.h
+++ b/include/linux/poison.h
@@ -48,6 +48,15 @@
 #define POISON_FREE     0x6b    /* for use-after-free poisoning */
 #define POISON_END      0xa5    /* end-byte of poisoning */
+/********** mm/hugetlb.c **********/
+/*
+ * Private mappings of hugetlb pages use this poisoned value for
+ * page->mapping. The core VM should not be doing anything with this mapping
+ * but futex requires the existence of some page->mapping value even though it
+ * is unused if PAGE_MAPPING_ANON is set.
+ */
+#define HUGETLB_POISON  ((void *)(0x00300300 + POISON_POINTER_DELTA + PAGE_MAPPING_ANON))
 /********** arch/$ARCH/mm/init.c **********/
 #define POISON_FREE_INITMEM     0xcc

diff --git a/include/linux/poison.h b/include/linux/poison.h index 2110a81c5e2a..34066ffd893d 100644 --- a/include/linux/poison.h +++ b/include/linux/poison.h
@@ -48,6 +48,15 @@
48	#define POISON_FREE 0x6b /* for use-after-free poisoning */	48	#define POISON_FREE 0x6b /* for use-after-free poisoning */
49	#define POISON_END 0xa5 /* end-byte of poisoning */	49	#define POISON_END 0xa5 /* end-byte of poisoning */
50		50
		51	/******** mm/hugetlb.c ********/
		52	/*
		53	* Private mappings of hugetlb pages use this poisoned value for
		54	* page->mapping. The core VM should not be doing anything with this mapping
		55	* but futex requires the existence of some page->mapping value even though it
		56	* is unused if PAGE_MAPPING_ANON is set.
		57	*/
		58	#define HUGETLB_POISON ((void *)(0x00300300 + POISON_POINTER_DELTA + PAGE_MAPPING_ANON))
		59
51	/******** arch/$ARCH/mm/init.c ********/	60	/******** arch/$ARCH/mm/init.c ********/
52	#define POISON_FREE_INITMEM 0xcc	61	#define POISON_FREE_INITMEM 0xcc
53		62