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-rw-r--r--include/linux/poison.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/poison.h b/include/linux/poison.h
index 317e16de09e5..76c3b6c38c16 100644
--- a/include/linux/poison.h
+++ b/include/linux/poison.h
@@ -32,6 +32,10 @@
/********** mm/debug-pagealloc.c **********/
#define PAGE_POISON 0xaa
+/********** mm/page_alloc.c ************/
+
+#define TAIL_MAPPING ((void *) 0x01014A11 + POISON_POINTER_DELTA)
+
/********** mm/slab.c **********/
/*
* Magic nums for obj red zoning.