#include "f2fs.h"
#include "trace.h"
-RADIX_TREE(pids, GFP_ATOMIC);
-spinlock_t pids_lock;
-struct last_io_info last_io;
+static RADIX_TREE(pids, GFP_ATOMIC);
+static spinlock_t pids_lock;
+static struct last_io_info last_io;
static inline void __print_last_io(void)
{