1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 6409d9cf5965..b244f69ef682 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -10,6 +10,14 @@
 #define VM_MAP          0x00000004      /* vmap()ed pages */
 /* bits [20..32] reserved for arch specific ioremap internals */
 
+/*
+ * Maximum alignment for ioremap() regions.
+ * Can be overriden by arch-specific value.
+ */
+#ifndef IOREMAP_MAX_ORDER
+#define IOREMAP_MAX_ORDER       (7 + PAGE_SHIFT)        /* 128 pages */
+#endif
+
 struct vm_struct {
         void                    *addr;
         unsigned long           size;