a26a2a2739
Impact: cleanup This patch cleans up the NMI safe code for dynamic ftrace as suggested by Andrew Morton. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
40 lines
939 B
C
40 lines
939 B
C
#ifndef _ASM_X86_FTRACE_H
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#define _ASM_X86_FTRACE_H
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((long)(mcount))
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#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
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#ifndef __ASSEMBLY__
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extern void mcount(void);
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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/*
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* call mcount is "e8 <4 byte offset>"
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* The addr points to the 4 byte offset and the caller of this
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* function wants the pointer to e8. Simply subtract one.
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*/
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return addr - 1;
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}
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#ifdef CONFIG_DYNAMIC_FTRACE
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extern void ftrace_nmi_enter(void);
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extern void ftrace_nmi_exit(void);
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#else
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static inline void ftrace_nmi_enter(void) { }
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static inline void ftrace_nmi_exit(void) { }
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#endif
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#endif /* __ASSEMBLY__ */
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#else /* CONFIG_FUNCTION_TRACER */
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#ifndef __ASSEMBLY__
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static inline void ftrace_nmi_enter(void) { }
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static inline void ftrace_nmi_exit(void) { }
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#endif
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif /* _ASM_X86_FTRACE_H */
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