add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/include/asm/ftrace.h
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@@ -8,6 +8,8 @@
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 #define MCOUNT_ADDR		((unsigned long)(_mcount))
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 #define MCOUNT_INSN_SIZE	4 /* sizeof mcount call */
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+#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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+
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 #ifdef __ASSEMBLY__
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 /* Based off of objdump optput from glibc */
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@@ -94,7 +96,7 @@
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 #endif /* PPC64_ELF_ABI_v1 */
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 #endif /* CONFIG_FTRACE_SYSCALLS */
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-#ifdef CONFIG_PPC64
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+#if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)
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 #include <asm/paca.h>
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 static inline void this_cpu_disable_ftrace(void)
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@@ -106,9 +108,25 @@
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 {
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 	get_paca()->ftrace_enabled = 1;
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 }
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+
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+/* Disable ftrace on this CPU if possible (may not be implemented) */
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+static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
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+{
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+	get_paca()->ftrace_enabled = ftrace_enabled;
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+}
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+
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+static inline u8 this_cpu_get_ftrace_enabled(void)
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+{
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+	return get_paca()->ftrace_enabled;
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+}
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+
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+void ftrace_free_init_tramp(void);
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 #else /* CONFIG_PPC64 */
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 static inline void this_cpu_disable_ftrace(void) { }
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 static inline void this_cpu_enable_ftrace(void) { }
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+static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
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+static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
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+static inline void ftrace_free_init_tramp(void) { }
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 #endif /* CONFIG_PPC64 */
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 #endif /* !__ASSEMBLY__ */
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