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* [PATCH] ftrace: Cleanup ftrace_dyn_arch_init()
@ 2021-09-03  7:18 Weizhao Ouyang
  2021-09-03  8:21 ` Heiko Carstens
  2021-09-04 11:59 ` Weizhao Ouyang
  0 siblings, 2 replies; 3+ messages in thread
From: Weizhao Ouyang @ 2021-09-03  7:18 UTC (permalink / raw)
  To: rostedt, mingo
  Cc: linux, catalin.marinas, will, guoren, monstr, tsbogend, nickhu,
	green.hu, deanbo422, James.Bottomley, deller, mpe, benh, paulus,
	paul.walmsley, palmer, aou, hca, gor, borntraeger, ysato, dalias,
	davem, tglx, bp, x86, hpa, linux-arm-kernel, linux-kernel,
	linux-csky, linux-ia64, linux-mips, linux-parisc, linuxppc-dev,
	linux-riscv, linux-s390, linux-sh, sparclinux, Weizhao Ouyang

Most 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>
---
 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..4db83cf4283f 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_WITH_REGS
+int __init ftrace_dyn_arch_init(void);
+#endif
+
 #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[];
-- 
2.30.2


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] ftrace: Cleanup ftrace_dyn_arch_init()
  2021-09-03  7:18 [PATCH] ftrace: Cleanup ftrace_dyn_arch_init() Weizhao Ouyang
@ 2021-09-03  8:21 ` Heiko Carstens
  2021-09-04 11:59 ` Weizhao Ouyang
  1 sibling, 0 replies; 3+ messages in thread
From: Heiko Carstens @ 2021-09-03  8:21 UTC (permalink / raw)
  To: Weizhao Ouyang
  Cc: rostedt, mingo, linux, catalin.marinas, will, guoren, monstr,
	tsbogend, nickhu, green.hu, deanbo422, James.Bottomley, deller,
	mpe, benh, paulus, paul.walmsley, palmer, aou, gor, borntraeger,
	ysato, dalias, davem, tglx, bp, x86, hpa, linux-arm-kernel,
	linux-kernel, linux-csky, linux-ia64, linux-mips, linux-parisc,
	linuxppc-dev, linux-riscv, linux-s390, linux-sh, sparclinux

On Fri, Sep 03, 2021 at 03:18:17PM +0800, Weizhao Ouyang wrote:
> Most 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>
> ---
>  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(-)

For s390:
Acked-by: Heiko Carstens <hca@linux.ibm.com>

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] ftrace: Cleanup ftrace_dyn_arch_init()
  2021-09-03  7:18 [PATCH] ftrace: Cleanup ftrace_dyn_arch_init() Weizhao Ouyang
  2021-09-03  8:21 ` Heiko Carstens
@ 2021-09-04 11:59 ` Weizhao Ouyang
  1 sibling, 0 replies; 3+ messages in thread
From: Weizhao Ouyang @ 2021-09-04 11:59 UTC (permalink / raw)
  To: rostedt, mingo
  Cc: linux, catalin.marinas, will, guoren, monstr, tsbogend, nickhu,
	green.hu, deanbo422, James.Bottomley, deller, mpe, benh, paulus,
	paul.walmsley, palmer, aou, hca, gor, borntraeger, ysato, dalias,
	davem, tglx, bp, x86, hpa, linux-arm-kernel, linux-kernel,
	linux-csky, linux-ia64, linux-mips, linux-parisc, linuxppc-dev,
	linux-riscv, linux-s390, linux-sh, sparclinux


On 2021/9/3 15:18, Weizhao Ouyang wrote:
> Most 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>
> ---
>  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..4db83cf4283f 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_WITH_REGS
> +int __init ftrace_dyn_arch_init(void);
> +#endif
> +

Sorry there is a mistake CONFIG, I will send a v2 patch later.

>  #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[];

Thanks.

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-09-04 12:00 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-03  7:18 [PATCH] ftrace: Cleanup ftrace_dyn_arch_init() Weizhao Ouyang
2021-09-03  8:21 ` Heiko Carstens
2021-09-04 11:59 ` Weizhao Ouyang

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