kernel-ark/include/asm-x86/ftrace.h

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#ifndef ASM_X86__FTRACE_H
#define ASM_X86__FTRACE_H
#ifdef CONFIG_FTRACE
#define MCOUNT_ADDR ((long)(mcount))
#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
#ifndef __ASSEMBLY__
extern void mcount(void);
#endif
#endif /* CONFIG_FTRACE */
#endif /* ASM_X86__FTRACE_H */