1. 根目录:
2. tools
3. perf
4. util
5. include
6. linux
7. magic.h

#ifndef _PERF_LINUX_MAGIC_H_
#define _PERF_LINUX_MAGIC_H_

#ifndef DEBUGFS_MAGIC
#define DEBUGFS_MAGIC          0x64626720
#endif

#ifndef SYSFS_MAGIC
#define SYSFS_MAGIC            0x62656572
#endif

#endif