| Message ID | 20210906111626.1259867-1-o451686892@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] ftrace: Cleanup ftrace_dyn_arch_init() | expand |
Weizhao Ouyang <o451686892@gmail.com> writes: > Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak common > ftrace_dyn_arch_init() to cleanup them. > > Signed-off-by: Weizhao Ouyang <o451686892@gmail.com> > Acked-by: Heiko Carstens <hca@linux.ibm.com> (s390) > > --- > > Changes in v2: > -- correct CONFIG_DYNAMIC_FTRACE on PowerPC > -- add Acked-by tag > diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h > index debe8c4f7062..d59f67c0225f 100644 > --- a/arch/powerpc/include/asm/ftrace.h > +++ b/arch/powerpc/include/asm/ftrace.h > @@ -61,6 +61,10 @@ struct dyn_arch_ftrace { > }; > #endif /* __ASSEMBLY__ */ > > +#ifdef CONFIG_DYNAMIC_FTRACE > +int __init ftrace_dyn_arch_init(void); > +#endif /* CONFIG_DYNAMIC_FTRACE */ > + > #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS > #define ARCH_SUPPORTS_FTRACE_OPS 1 > #endif That breaks the build for powerpc: /linux/arch/powerpc/include/asm/ftrace.h: Assembler messages: /linux/arch/powerpc/include/asm/ftrace.h:65: Error: unrecognized opcode: `int' make[4]: *** [/linux/scripts/Makefile.build:352: arch/powerpc/kernel/trace/ftrace_64.o] Error 1 make[3]: *** [/linux/scripts/Makefile.build:514: arch/powerpc/kernel/trace] Error 2 make[2]: *** [/linux/scripts/Makefile.build:514: arch/powerpc/kernel] Error 2 make[1]: *** [/linux/Makefile:1861: arch/powerpc] Error 2 make[1]: *** Waiting for unfinished jobs.... It needs to be inside an #ifndef __ASSEMBLY__ section. cheers
On 2021/9/6 22:22, Michael Ellerman wrote: > Weizhao Ouyang <o451686892@gmail.com> writes: >> Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak common >> ftrace_dyn_arch_init() to cleanup them. >> >> Signed-off-by: Weizhao Ouyang <o451686892@gmail.com> >> Acked-by: Heiko Carstens <hca@linux.ibm.com> (s390) >> >> --- >> >> Changes in v2: >> -- correct CONFIG_DYNAMIC_FTRACE on PowerPC >> -- add Acked-by tag >> diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h >> index debe8c4f7062..d59f67c0225f 100644 >> --- a/arch/powerpc/include/asm/ftrace.h >> +++ b/arch/powerpc/include/asm/ftrace.h >> @@ -61,6 +61,10 @@ struct dyn_arch_ftrace { >> }; >> #endif /* __ASSEMBLY__ */ >> >> +#ifdef CONFIG_DYNAMIC_FTRACE >> +int __init ftrace_dyn_arch_init(void); >> +#endif /* CONFIG_DYNAMIC_FTRACE */ >> + >> #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS >> #define ARCH_SUPPORTS_FTRACE_OPS 1 >> #endif > That breaks the build for powerpc: > > /linux/arch/powerpc/include/asm/ftrace.h: Assembler messages: > /linux/arch/powerpc/include/asm/ftrace.h:65: Error: unrecognized opcode: `int' > make[4]: *** [/linux/scripts/Makefile.build:352: arch/powerpc/kernel/trace/ftrace_64.o] Error 1 > make[3]: *** [/linux/scripts/Makefile.build:514: arch/powerpc/kernel/trace] Error 2 > make[2]: *** [/linux/scripts/Makefile.build:514: arch/powerpc/kernel] Error 2 > make[1]: *** [/linux/Makefile:1861: arch/powerpc] Error 2 > make[1]: *** Waiting for unfinished jobs.... > > It needs to be inside an #ifndef __ASSEMBLY__ section. > > cheers Thanks for reply, I'll fix it up.
On 9/6/21 1:16 PM, Weizhao Ouyang wrote: > Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak common > ftrace_dyn_arch_init() to cleanup them. > > Signed-off-by: Weizhao Ouyang <o451686892@gmail.com> > Acked-by: Heiko Carstens <hca@linux.ibm.com> (s390) Acked-by: Helge Deller <deller@gmx.de> # parisc Thanks, Helge > --- > > Changes in v2: > -- correct CONFIG_DYNAMIC_FTRACE on PowerPC > -- add Acked-by tag > > --- > arch/arm/kernel/ftrace.c | 5 ----- > arch/arm64/kernel/ftrace.c | 5 ----- > arch/csky/kernel/ftrace.c | 5 ----- > arch/ia64/kernel/ftrace.c | 6 ------ > arch/microblaze/kernel/ftrace.c | 5 ----- > arch/mips/include/asm/ftrace.h | 2 ++ > arch/nds32/kernel/ftrace.c | 5 ----- > arch/parisc/kernel/ftrace.c | 5 ----- > arch/powerpc/include/asm/ftrace.h | 4 ++++ > arch/riscv/kernel/ftrace.c | 5 ----- > arch/s390/kernel/ftrace.c | 5 ----- > arch/sh/kernel/ftrace.c | 5 ----- > arch/sparc/kernel/ftrace.c | 5 ----- > arch/x86/kernel/ftrace.c | 5 ----- > include/linux/ftrace.h | 1 - > kernel/trace/ftrace.c | 5 +++++ > 16 files changed, 11 insertions(+), 62 deletions(-) > > diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c > index 3c83b5d29697..a006585e1c09 100644 > --- a/arch/arm/kernel/ftrace.c > +++ b/arch/arm/kernel/ftrace.c > @@ -193,11 +193,6 @@ int ftrace_make_nop(struct module *mod, > > return ret; > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif /* CONFIG_DYNAMIC_FTRACE */ > > #ifdef CONFIG_FUNCTION_GRAPH_TRACER > diff --git a/arch/arm64/kernel/ftrace.c b/arch/arm64/kernel/ftrace.c > index 7f467bd9db7a..fc62dfe73f93 100644 > --- a/arch/arm64/kernel/ftrace.c > +++ b/arch/arm64/kernel/ftrace.c > @@ -236,11 +236,6 @@ void arch_ftrace_update_code(int command) > command |= FTRACE_MAY_SLEEP; > ftrace_modify_all_code(command); > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif /* CONFIG_DYNAMIC_FTRACE */ > > #ifdef CONFIG_FUNCTION_GRAPH_TRACER > diff --git a/arch/csky/kernel/ftrace.c b/arch/csky/kernel/ftrace.c > index b4a7ec1517ff..50bfcf129078 100644 > --- a/arch/csky/kernel/ftrace.c > +++ b/arch/csky/kernel/ftrace.c > @@ -133,11 +133,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) > (unsigned long)func, true, true); > return ret; > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif /* CONFIG_DYNAMIC_FTRACE */ > > #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS > diff --git a/arch/ia64/kernel/ftrace.c b/arch/ia64/kernel/ftrace.c > index b2ab2d58fb30..d6360fd404ab 100644 > --- a/arch/ia64/kernel/ftrace.c > +++ b/arch/ia64/kernel/ftrace.c > @@ -194,9 +194,3 @@ int ftrace_update_ftrace_func(ftrace_func_t func) > flush_icache_range(addr, addr + 16); > return 0; > } > - > -/* run from kstop_machine */ > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > diff --git a/arch/microblaze/kernel/ftrace.c b/arch/microblaze/kernel/ftrace.c > index 224eea40e1ee..188749d62709 100644 > --- a/arch/microblaze/kernel/ftrace.c > +++ b/arch/microblaze/kernel/ftrace.c > @@ -163,11 +163,6 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) > return ret; > } > > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > - > int ftrace_update_ftrace_func(ftrace_func_t func) > { > unsigned long ip = (unsigned long)(&ftrace_call); > diff --git a/arch/mips/include/asm/ftrace.h b/arch/mips/include/asm/ftrace.h > index b463f2aa5a61..ed013e767390 100644 > --- a/arch/mips/include/asm/ftrace.h > +++ b/arch/mips/include/asm/ftrace.h > @@ -76,6 +76,8 @@ do { \ > > > #ifdef CONFIG_DYNAMIC_FTRACE > +int __init ftrace_dyn_arch_init(void); > + > static inline unsigned long ftrace_call_adjust(unsigned long addr) > { > return addr; > diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c > index 0e23e3a8df6b..f0ef4842d191 100644 > --- a/arch/nds32/kernel/ftrace.c > +++ b/arch/nds32/kernel/ftrace.c > @@ -84,11 +84,6 @@ void _ftrace_caller(unsigned long parent_ip) > /* restore all state needed by the compiler epilogue */ > } > > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > - > static unsigned long gen_sethi_insn(unsigned long addr) > { > unsigned long opcode = 0x46000000; > diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c > index 0a1e75af5382..01581f715737 100644 > --- a/arch/parisc/kernel/ftrace.c > +++ b/arch/parisc/kernel/ftrace.c > @@ -94,11 +94,6 @@ int ftrace_disable_ftrace_graph_caller(void) > #endif > > #ifdef CONFIG_DYNAMIC_FTRACE > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > int ftrace_update_ftrace_func(ftrace_func_t func) > { > return 0; > diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h > index debe8c4f7062..d59f67c0225f 100644 > --- a/arch/powerpc/include/asm/ftrace.h > +++ b/arch/powerpc/include/asm/ftrace.h > @@ -61,6 +61,10 @@ struct dyn_arch_ftrace { > }; > #endif /* __ASSEMBLY__ */ > > +#ifdef CONFIG_DYNAMIC_FTRACE > +int __init ftrace_dyn_arch_init(void); > +#endif /* CONFIG_DYNAMIC_FTRACE */ > + > #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS > #define ARCH_SUPPORTS_FTRACE_OPS 1 > #endif > diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c > index 7f1e5203de88..4716f4cdc038 100644 > --- a/arch/riscv/kernel/ftrace.c > +++ b/arch/riscv/kernel/ftrace.c > @@ -154,11 +154,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) > > return ret; > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif > > #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS > diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c > index 0a464d328467..3fd80397ff52 100644 > --- a/arch/s390/kernel/ftrace.c > +++ b/arch/s390/kernel/ftrace.c > @@ -262,11 +262,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) > return 0; > } > > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > - > void arch_ftrace_update_code(int command) > { > if (ftrace_shared_hotpatch_trampoline(NULL)) > diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c > index 295c43315bbe..930001bb8c6a 100644 > --- a/arch/sh/kernel/ftrace.c > +++ b/arch/sh/kernel/ftrace.c > @@ -252,11 +252,6 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) > > return ftrace_modify_code(rec->ip, old, new); > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif /* CONFIG_DYNAMIC_FTRACE */ > > #ifdef CONFIG_FUNCTION_GRAPH_TRACER > diff --git a/arch/sparc/kernel/ftrace.c b/arch/sparc/kernel/ftrace.c > index 684b84ce397f..eaead3da8e03 100644 > --- a/arch/sparc/kernel/ftrace.c > +++ b/arch/sparc/kernel/ftrace.c > @@ -82,11 +82,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) > new = ftrace_call_replace(ip, (unsigned long)func); > return ftrace_modify_code(ip, old, new); > } > - > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > #endif > > #ifdef CONFIG_FUNCTION_GRAPH_TRACER > diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c > index 1b3ce3b4a2a2..23d221a9a3cd 100644 > --- a/arch/x86/kernel/ftrace.c > +++ b/arch/x86/kernel/ftrace.c > @@ -252,11 +252,6 @@ void arch_ftrace_update_code(int command) > ftrace_modify_all_code(command); > } > > -int __init ftrace_dyn_arch_init(void) > -{ > - return 0; > -} > - > /* Currently only x86_64 supports dynamic trampolines */ > #ifdef CONFIG_X86_64 > > diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h > index 832e65f06754..f1eca123d89d 100644 > --- a/include/linux/ftrace.h > +++ b/include/linux/ftrace.h > @@ -573,7 +573,6 @@ ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable); > > /* defined in arch */ > extern int ftrace_ip_converted(unsigned long ip); > -extern int ftrace_dyn_arch_init(void); > extern void ftrace_replace_code(int enable); > extern int ftrace_update_ftrace_func(ftrace_func_t func); > extern void ftrace_caller(void); > diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c > index 7efbc8aaf7f6..4c090323198d 100644 > --- a/kernel/trace/ftrace.c > +++ b/kernel/trace/ftrace.c > @@ -6846,6 +6846,11 @@ void __init ftrace_free_init_mem(void) > ftrace_free_mem(NULL, start, end); > } > > +int __init __weak ftrace_dyn_arch_init(void) > +{ > + return 0; > +} > + > void __init ftrace_init(void) > { > extern unsigned long __start_mcount_loc[]; >
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index 3c83b5d29697..a006585e1c09 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -193,11 +193,6 @@ int ftrace_make_nop(struct module *mod, return ret; } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif /* CONFIG_DYNAMIC_FTRACE */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/arch/arm64/kernel/ftrace.c b/arch/arm64/kernel/ftrace.c index 7f467bd9db7a..fc62dfe73f93 100644 --- a/arch/arm64/kernel/ftrace.c +++ b/arch/arm64/kernel/ftrace.c @@ -236,11 +236,6 @@ void arch_ftrace_update_code(int command) command |= FTRACE_MAY_SLEEP; ftrace_modify_all_code(command); } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif /* CONFIG_DYNAMIC_FTRACE */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/arch/csky/kernel/ftrace.c b/arch/csky/kernel/ftrace.c index b4a7ec1517ff..50bfcf129078 100644 --- a/arch/csky/kernel/ftrace.c +++ b/arch/csky/kernel/ftrace.c @@ -133,11 +133,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) (unsigned long)func, true, true); return ret; } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif /* CONFIG_DYNAMIC_FTRACE */ #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS diff --git a/arch/ia64/kernel/ftrace.c b/arch/ia64/kernel/ftrace.c index b2ab2d58fb30..d6360fd404ab 100644 --- a/arch/ia64/kernel/ftrace.c +++ b/arch/ia64/kernel/ftrace.c @@ -194,9 +194,3 @@ int ftrace_update_ftrace_func(ftrace_func_t func) flush_icache_range(addr, addr + 16); return 0; } - -/* run from kstop_machine */ -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} diff --git a/arch/microblaze/kernel/ftrace.c b/arch/microblaze/kernel/ftrace.c index 224eea40e1ee..188749d62709 100644 --- a/arch/microblaze/kernel/ftrace.c +++ b/arch/microblaze/kernel/ftrace.c @@ -163,11 +163,6 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) return ret; } -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} - int ftrace_update_ftrace_func(ftrace_func_t func) { unsigned long ip = (unsigned long)(&ftrace_call); diff --git a/arch/mips/include/asm/ftrace.h b/arch/mips/include/asm/ftrace.h index b463f2aa5a61..ed013e767390 100644 --- a/arch/mips/include/asm/ftrace.h +++ b/arch/mips/include/asm/ftrace.h @@ -76,6 +76,8 @@ do { \ #ifdef CONFIG_DYNAMIC_FTRACE +int __init ftrace_dyn_arch_init(void); + static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c index 0e23e3a8df6b..f0ef4842d191 100644 --- a/arch/nds32/kernel/ftrace.c +++ b/arch/nds32/kernel/ftrace.c @@ -84,11 +84,6 @@ void _ftrace_caller(unsigned long parent_ip) /* restore all state needed by the compiler epilogue */ } -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} - static unsigned long gen_sethi_insn(unsigned long addr) { unsigned long opcode = 0x46000000; diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c index 0a1e75af5382..01581f715737 100644 --- a/arch/parisc/kernel/ftrace.c +++ b/arch/parisc/kernel/ftrace.c @@ -94,11 +94,6 @@ int ftrace_disable_ftrace_graph_caller(void) #endif #ifdef CONFIG_DYNAMIC_FTRACE - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} int ftrace_update_ftrace_func(ftrace_func_t func) { return 0; diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index debe8c4f7062..d59f67c0225f 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -61,6 +61,10 @@ struct dyn_arch_ftrace { }; #endif /* __ASSEMBLY__ */ +#ifdef CONFIG_DYNAMIC_FTRACE +int __init ftrace_dyn_arch_init(void); +#endif /* CONFIG_DYNAMIC_FTRACE */ + #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS #define ARCH_SUPPORTS_FTRACE_OPS 1 #endif diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c index 7f1e5203de88..4716f4cdc038 100644 --- a/arch/riscv/kernel/ftrace.c +++ b/arch/riscv/kernel/ftrace.c @@ -154,11 +154,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) return ret; } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c index 0a464d328467..3fd80397ff52 100644 --- a/arch/s390/kernel/ftrace.c +++ b/arch/s390/kernel/ftrace.c @@ -262,11 +262,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) return 0; } -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} - void arch_ftrace_update_code(int command) { if (ftrace_shared_hotpatch_trampoline(NULL)) diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c index 295c43315bbe..930001bb8c6a 100644 --- a/arch/sh/kernel/ftrace.c +++ b/arch/sh/kernel/ftrace.c @@ -252,11 +252,6 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) return ftrace_modify_code(rec->ip, old, new); } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif /* CONFIG_DYNAMIC_FTRACE */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/arch/sparc/kernel/ftrace.c b/arch/sparc/kernel/ftrace.c index 684b84ce397f..eaead3da8e03 100644 --- a/arch/sparc/kernel/ftrace.c +++ b/arch/sparc/kernel/ftrace.c @@ -82,11 +82,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func) new = ftrace_call_replace(ip, (unsigned long)func); return ftrace_modify_code(ip, old, new); } - -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} #endif #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index 1b3ce3b4a2a2..23d221a9a3cd 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -252,11 +252,6 @@ void arch_ftrace_update_code(int command) ftrace_modify_all_code(command); } -int __init ftrace_dyn_arch_init(void) -{ - return 0; -} - /* Currently only x86_64 supports dynamic trampolines */ #ifdef CONFIG_X86_64 diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 832e65f06754..f1eca123d89d 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -573,7 +573,6 @@ ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable); /* defined in arch */ extern int ftrace_ip_converted(unsigned long ip); -extern int ftrace_dyn_arch_init(void); extern void ftrace_replace_code(int enable); extern int ftrace_update_ftrace_func(ftrace_func_t func); extern void ftrace_caller(void); diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 7efbc8aaf7f6..4c090323198d 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -6846,6 +6846,11 @@ void __init ftrace_free_init_mem(void) ftrace_free_mem(NULL, start, end); } +int __init __weak ftrace_dyn_arch_init(void) +{ + return 0; +} + void __init ftrace_init(void) { extern unsigned long __start_mcount_loc[];