hwrng: timeriomem - add include guard to timeriomem-rng.h

Add a header include guard just in case.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/include/linux/timeriomem-rng.h b/include/linux/timeriomem-rng.h
index fd4a6e6..672df7f 100644 (file)
--- a/include/linux/timeriomem-rng.h
+++ b/include/linux/timeriomem-rng.h
@@ -5,6 +5,9 @@
  * Copyright (c) 2009 Alexander Clouter <alex@digriz.org.uk>
  */
 
+#ifndef _LINUX_TIMERIOMEM_RNG_H
+#define _LINUX_TIMERIOMEM_RNG_H
+
 struct timeriomem_rng_data {
        void __iomem            *address;
 
@@ -14,3 +17,5 @@ struct timeriomem_rng_data {
        /* bits of entropy per 1024 bits read */
        unsigned int            quality;
 };
+
+#endif /* _LINUX_TIMERIOMEM_RNG_H */