1#ifndef __LINUX_STRINGIFY_H
2#define __LINUX_STRINGIFY_H
3
4/* Indirect stringification. Doing two levels allows the parameter to be a
5 * macro itself. For example, compile with -DFOO=bar, __stringify(FOO)
6 * converts to "bar".
7 */
8
9#define __stringify_1(x...) #x
10#define __stringify(x...) __stringify_1(x)
11
12#define FILE_LINE __FILE__ ":" __stringify(__LINE__)
13
14#endif /* !__LINUX_STRINGIFY_H */
15

source code of linux/include/linux/stringify.h