s390/ftrace: add FTRACE_GEN_NOP_ASM macro

[linux-2.6-microblaze.git] / arch / s390 / include / asm / ftrace.h

diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index e8b460f..d1841f4 100644 (file)
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -68,4 +68,32 @@ static inline bool arch_syscall_match_sym_name(const char *sym,
 }
 
 #endif /* __ASSEMBLY__ */
+
+#ifdef CONFIG_FUNCTION_TRACER
+
+#define FTRACE_NOP_INSN .word 0xc004, 0x0000, 0x0000 /* brcl 0,0 */
+
+#ifndef CC_USING_HOTPATCH
+
+#define FTRACE_GEN_MCOUNT_RECORD(name)         \
+       .section __mcount_loc, "a", @progbits;  \
+       .quad name;                             \
+       .previous;
+
+#else /* !CC_USING_HOTPATCH */
+
+#define FTRACE_GEN_MCOUNT_RECORD(name)
+
+#endif /* !CC_USING_HOTPATCH */
+
+#define FTRACE_GEN_NOP_ASM(name)               \
+       FTRACE_GEN_MCOUNT_RECORD(name)          \
+       FTRACE_NOP_INSN
+
+#else /* CONFIG_FUNCTION_TRACER */
+
+#define FTRACE_GEN_NOP_ASM(name)
+
+#endif /* CONFIG_FUNCTION_TRACER */
+
 #endif /* _ASM_S390_FTRACE_H */