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-rw-r--r--include/linux/vmalloc.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 6409d9cf596..b244f69ef68 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;