include/linux/genalloc.h: add multiple-inclusion guards

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice VILCHEZ <patrice.vilchez@atmel.com>
Cc: Jes Sorensen <jes@wildopensource.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/linux/genalloc.h

@@ -9,6 +9,8 @@
  */
 
 
+#ifndef __GENALLOC_H__
+#define __GENALLOC_H__
 /*
  *  General purpose special memory pool descriptor.
  */
@@ -34,3 +36,4 @@ extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
 extern void gen_pool_destroy(struct gen_pool *);
 extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
 extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
+#endif /* __GENALLOC_H__ */