html/doxygen/bug_8h_source.html

 #ifndef __ASM_BUG_H__
 #define __ASM_BUG_H__

 #include <assert.h>

 #define BUG() assert(0)

 #define WARN_ON(condition) do { } while (0)

 #endif /* __ASM_BUG_H__ */
assert.h
Information for the Assert Handler.