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-rw-r--r--include/linux/log2.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 1f977d60..96f62458 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -12,7 +12,13 @@
#ifndef _TOOLS_LINUX_LOG2_H
#define _TOOLS_LINUX_LOG2_H
+#include <limits.h>
+#ifndef PAGE_SHIFT
+#define PAGE_SHIFT ilog2(PAGE_SIZE)
+#endif
+
#include <linux/bitops.h>
+#include <linux/compiler.h>
/*
* deal with unrepresentable constant logarithms