[PATCH] #ifndef guard percpu_counter.h and blockgroup_lock.h

Insert header guards to allow possible multiple inclusion for
include/linux/percpu_counter.h and include/linux/blockgroup_lock.h
Signed-off-by: Adrian Bunk <bunk@fs.tum.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/blockgroup_lock.h

+#ifndef _LINUX_BLOCKGROUP_LOCK_H
+#define _LINUX_BLOCKGROUP_LOCK_H
 /*
  * Per-blockgroup locking for ext2 and ext3.
  *
@@ -55,4 +57,4 @@ static inline void bgl_lock_init(struct blockgroup_lock *bgl)
 #define sb_bgl_lock(sb, block_group) \
 	(&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock)
 
-
+#endif

include/linux/percpu_counter.h

+#ifndef _LINUX_PERCPU_COUNTER_H
+#define _LINUX_PERCPU_COUNTER_H
 /*
  * A simple "approximate counter" for use in ext2 and ext3 superblocks.
  *
@@ -101,3 +103,5 @@ static inline void percpu_counter_dec(struct percpu_counter *fbc)
 {
 	percpu_counter_mod(fbc, -1);
 }
+
+#endif /* _LINUX_PERCPU_COUNTER_H */