[PATCH 0/9] riscv: misc cleanup

[PATCH 0/9] riscv: misc cleanup

[Nanyong Sun]

Fix some compilation warnings,improve code style

Nanyong Sun (9):
  riscv: traps: Fix no prototype warnings
  riscv: irq: Fix no prototype warning
  riscv: sbi: Fix comment of __sbi_set_timer_v01
  riscv: ptrace: Fix no prototype warnings
  riscv: time: Fix no prototype for time_init
  riscv: syscall_table: Reduce W=1 compilation warnings noise
  riscv: process: Fix no prototype for show_regs
  riscv: ftrace: Use ftrace_get_regs helper
  riscv: process: Fix no prototype for arch_dup_task_struct

 arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
 arch/riscv/include/asm/irq.h            |  2 ++
 arch/riscv/include/asm/processor.h      |  1 +
 arch/riscv/include/asm/ptrace.h         |  5 +++++
 arch/riscv/include/asm/timex.h          |  2 ++
 arch/riscv/kernel/Makefile              |  1 +
 arch/riscv/kernel/probes/ftrace.c       | 16 +++++++++-------
 arch/riscv/kernel/process.c             |  1 +
 arch/riscv/kernel/sbi.c                 |  2 +-
 arch/riscv/kernel/time.c                |  1 +
 arch/riscv/kernel/traps.c               |  1 +
 11 files changed, 40 insertions(+), 8 deletions(-)

-- 
2.25.1

[PATCH 0/9] riscv: misc cleanup

[Nanyong Sun]

Fix some compilation warnings,improve code style

Nanyong Sun (9):
  riscv: traps: Fix no prototype warnings
  riscv: irq: Fix no prototype warning
  riscv: sbi: Fix comment of __sbi_set_timer_v01
  riscv: ptrace: Fix no prototype warnings
  riscv: time: Fix no prototype for time_init
  riscv: syscall_table: Reduce W=1 compilation warnings noise
  riscv: process: Fix no prototype for show_regs
  riscv: ftrace: Use ftrace_get_regs helper
  riscv: process: Fix no prototype for arch_dup_task_struct

 arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
 arch/riscv/include/asm/irq.h            |  2 ++
 arch/riscv/include/asm/processor.h      |  1 +
 arch/riscv/include/asm/ptrace.h         |  5 +++++
 arch/riscv/include/asm/timex.h          |  2 ++
 arch/riscv/kernel/Makefile              |  1 +
 arch/riscv/kernel/probes/ftrace.c       | 16 +++++++++-------
 arch/riscv/kernel/process.c             |  1 +
 arch/riscv/kernel/sbi.c                 |  2 +-
 arch/riscv/kernel/time.c                |  1 +
 arch/riscv/kernel/traps.c               |  1 +
 11 files changed, 40 insertions(+), 8 deletions(-)

-- 
2.25.1


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[PATCH 1/9] riscv: traps: Fix no prototype warnings

[Nanyong Sun]

Fix all W=1 compilation warnings:'no previous prototype for' in arch/riscv/kernel/traps.c:
arch/riscv/kernel/traps.c:96:15: warning: no previous prototype for ‘do_trap_unknown’ [-Wmissing-prototypes]
   96 | DO_ERROR_INFO(do_trap_unknown,
      |               ^~~~~~~~~~~~~~~
arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
   91 | asmlinkage __visible void name(struct pt_regs *regs)   \
      |                           ^~~~
arch/riscv/kernel/traps.c:98:15: warning: no previous prototype for ‘do_trap_insn_misaligned’ [-Wmissing-prototypes]
   98 | DO_ERROR_INFO(do_trap_insn_misaligned,
      |               ^~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
   91 | asmlinkage __visible void name(struct pt_regs *regs)   \
      |                           ^~~~
arch/riscv/kernel/traps.c:100:15: warning: no previous prototype for ‘do_trap_insn_fault’ [-Wmissing-prototypes]
...

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
 arch/riscv/kernel/traps.c               |  1 +
 2 files changed, 17 insertions(+)

diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h
index 27e005fca584..6d81abf5d9f8 100644
--- a/arch/riscv/include/asm/asm-prototypes.h
+++ b/arch/riscv/include/asm/asm-prototypes.h
@@ -9,4 +9,20 @@ long long __lshrti3(long long a, int b);
 long long __ashrti3(long long a, int b);
 long long __ashlti3(long long a, int b);
 
+
+#define DECLARE_DO_ERROR_INFO(name)	asmlinkage void name(struct pt_regs *regs);
+
+DECLARE_DO_ERROR_INFO(do_trap_unknown)
+DECLARE_DO_ERROR_INFO(do_trap_insn_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_insn_fault)
+DECLARE_DO_ERROR_INFO(do_trap_insn_illegal)
+DECLARE_DO_ERROR_INFO(do_trap_load_fault)
+DECLARE_DO_ERROR_INFO(do_trap_load_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_store_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_store_fault)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_u)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_s)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_m)
+DECLARE_DO_ERROR_INFO(do_trap_break)
+
 #endif /* _ASM_RISCV_PROTOTYPES_H */
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 3ed2c23601a0..0879b5df11b9 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/irq.h>
 
+#include <asm/asm-prototypes.h>
 #include <asm/bug.h>
 #include <asm/processor.h>
 #include <asm/ptrace.h>
-- 
2.25.1

[PATCH 1/9] riscv: traps: Fix no prototype warnings

[Nanyong Sun]

Fix all W=1 compilation warnings:'no previous prototype for' in arch/riscv/kernel/traps.c:
arch/riscv/kernel/traps.c:96:15: warning: no previous prototype for ‘do_trap_unknown’ [-Wmissing-prototypes]
   96 | DO_ERROR_INFO(do_trap_unknown,
      |               ^~~~~~~~~~~~~~~
arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
   91 | asmlinkage __visible void name(struct pt_regs *regs)   \
      |                           ^~~~
arch/riscv/kernel/traps.c:98:15: warning: no previous prototype for ‘do_trap_insn_misaligned’ [-Wmissing-prototypes]
   98 | DO_ERROR_INFO(do_trap_insn_misaligned,
      |               ^~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
   91 | asmlinkage __visible void name(struct pt_regs *regs)   \
      |                           ^~~~
arch/riscv/kernel/traps.c:100:15: warning: no previous prototype for ‘do_trap_insn_fault’ [-Wmissing-prototypes]
...

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
 arch/riscv/kernel/traps.c               |  1 +
 2 files changed, 17 insertions(+)

diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h
index 27e005fca584..6d81abf5d9f8 100644
--- a/arch/riscv/include/asm/asm-prototypes.h
+++ b/arch/riscv/include/asm/asm-prototypes.h
@@ -9,4 +9,20 @@ long long __lshrti3(long long a, int b);
 long long __ashrti3(long long a, int b);
 long long __ashlti3(long long a, int b);
 
+
+#define DECLARE_DO_ERROR_INFO(name)	asmlinkage void name(struct pt_regs *regs);
+
+DECLARE_DO_ERROR_INFO(do_trap_unknown)
+DECLARE_DO_ERROR_INFO(do_trap_insn_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_insn_fault)
+DECLARE_DO_ERROR_INFO(do_trap_insn_illegal)
+DECLARE_DO_ERROR_INFO(do_trap_load_fault)
+DECLARE_DO_ERROR_INFO(do_trap_load_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_store_misaligned)
+DECLARE_DO_ERROR_INFO(do_trap_store_fault)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_u)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_s)
+DECLARE_DO_ERROR_INFO(do_trap_ecall_m)
+DECLARE_DO_ERROR_INFO(do_trap_break)
+
 #endif /* _ASM_RISCV_PROTOTYPES_H */
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 3ed2c23601a0..0879b5df11b9 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/irq.h>
 
+#include <asm/asm-prototypes.h>
 #include <asm/bug.h>
 #include <asm/processor.h>
 #include <asm/ptrace.h>
-- 
2.25.1


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Re: [PATCH 1/9] riscv: traps: Fix no prototype warnings

[Palmer Dabbelt]

On Fri, 05 Mar 2021 03:33:24 PST (-0800), sunnanyong@huawei.com wrote:
> Fix all W=1 compilation warnings:'no previous prototype for' in arch/riscv/kernel/traps.c:
> arch/riscv/kernel/traps.c:96:15: warning: no previous prototype for ‘do_trap_unknown’ [-Wmissing-prototypes]
>    96 | DO_ERROR_INFO(do_trap_unknown,
>       |               ^~~~~~~~~~~~~~~
> arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
>    91 | asmlinkage __visible void name(struct pt_regs *regs)   \
>       |                           ^~~~
> arch/riscv/kernel/traps.c:98:15: warning: no previous prototype for ‘do_trap_insn_misaligned’ [-Wmissing-prototypes]
>    98 | DO_ERROR_INFO(do_trap_insn_misaligned,
>       |               ^~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
>    91 | asmlinkage __visible void name(struct pt_regs *regs)   \
>       |                           ^~~~
> arch/riscv/kernel/traps.c:100:15: warning: no previous prototype for ‘do_trap_insn_fault’ [-Wmissing-prototypes]
> ...
>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
> ---
>  arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
>  arch/riscv/kernel/traps.c               |  1 +
>  2 files changed, 17 insertions(+)
>
> diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h
> index 27e005fca584..6d81abf5d9f8 100644
> --- a/arch/riscv/include/asm/asm-prototypes.h
> +++ b/arch/riscv/include/asm/asm-prototypes.h
> @@ -9,4 +9,20 @@ long long __lshrti3(long long a, int b);
>  long long __ashrti3(long long a, int b);
>  long long __ashlti3(long long a, int b);
>
> +
> +#define DECLARE_DO_ERROR_INFO(name)	asmlinkage void name(struct pt_regs *regs);

This triggers checkpatch.

> +
> +DECLARE_DO_ERROR_INFO(do_trap_unknown)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_illegal)
> +DECLARE_DO_ERROR_INFO(do_trap_load_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_load_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_store_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_store_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_u)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_s)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_m)
> +DECLARE_DO_ERROR_INFO(do_trap_break)
> +
>  #endif /* _ASM_RISCV_PROTOTYPES_H */
> diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
> index 3ed2c23601a0..0879b5df11b9 100644
> --- a/arch/riscv/kernel/traps.c
> +++ b/arch/riscv/kernel/traps.c
> @@ -17,6 +17,7 @@
>  #include <linux/module.h>
>  #include <linux/irq.h>
>
> +#include <asm/asm-prototypes.h>
>  #include <asm/bug.h>
>  #include <asm/processor.h>
>  #include <asm/ptrace.h>

Re: [PATCH 1/9] riscv: traps: Fix no prototype warnings

[Palmer Dabbelt]

On Fri, 05 Mar 2021 03:33:24 PST (-0800), sunnanyong@huawei.com wrote:
> Fix all W=1 compilation warnings:'no previous prototype for' in arch/riscv/kernel/traps.c:
> arch/riscv/kernel/traps.c:96:15: warning: no previous prototype for ‘do_trap_unknown’ [-Wmissing-prototypes]
>    96 | DO_ERROR_INFO(do_trap_unknown,
>       |               ^~~~~~~~~~~~~~~
> arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
>    91 | asmlinkage __visible void name(struct pt_regs *regs)   \
>       |                           ^~~~
> arch/riscv/kernel/traps.c:98:15: warning: no previous prototype for ‘do_trap_insn_misaligned’ [-Wmissing-prototypes]
>    98 | DO_ERROR_INFO(do_trap_insn_misaligned,
>       |               ^~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/kernel/traps.c:91:27: note: in definition of macro ‘DO_ERROR_INFO’
>    91 | asmlinkage __visible void name(struct pt_regs *regs)   \
>       |                           ^~~~
> arch/riscv/kernel/traps.c:100:15: warning: no previous prototype for ‘do_trap_insn_fault’ [-Wmissing-prototypes]
> ...
>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
> ---
>  arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
>  arch/riscv/kernel/traps.c               |  1 +
>  2 files changed, 17 insertions(+)
>
> diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h
> index 27e005fca584..6d81abf5d9f8 100644
> --- a/arch/riscv/include/asm/asm-prototypes.h
> +++ b/arch/riscv/include/asm/asm-prototypes.h
> @@ -9,4 +9,20 @@ long long __lshrti3(long long a, int b);
>  long long __ashrti3(long long a, int b);
>  long long __ashlti3(long long a, int b);
>
> +
> +#define DECLARE_DO_ERROR_INFO(name)	asmlinkage void name(struct pt_regs *regs);

This triggers checkpatch.

> +
> +DECLARE_DO_ERROR_INFO(do_trap_unknown)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_insn_illegal)
> +DECLARE_DO_ERROR_INFO(do_trap_load_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_load_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_store_misaligned)
> +DECLARE_DO_ERROR_INFO(do_trap_store_fault)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_u)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_s)
> +DECLARE_DO_ERROR_INFO(do_trap_ecall_m)
> +DECLARE_DO_ERROR_INFO(do_trap_break)
> +
>  #endif /* _ASM_RISCV_PROTOTYPES_H */
> diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
> index 3ed2c23601a0..0879b5df11b9 100644
> --- a/arch/riscv/kernel/traps.c
> +++ b/arch/riscv/kernel/traps.c
> @@ -17,6 +17,7 @@
>  #include <linux/module.h>
>  #include <linux/irq.h>
>
> +#include <asm/asm-prototypes.h>
>  #include <asm/bug.h>
>  #include <asm/processor.h>
>  #include <asm/ptrace.h>

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[PATCH 2/9] riscv: irq: Fix no prototype warning

[Nanyong Sun]

Fix the following W=1 kernel compilation warning:
arch/riscv/kernel/irq.c:19:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
   19 | void __init init_IRQ(void)
      |             ^~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/irq.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
index 9807ad164015..e4c435509983 100644
--- a/arch/riscv/include/asm/irq.h
+++ b/arch/riscv/include/asm/irq.h
@@ -12,4 +12,6 @@
 
 #include <asm-generic/irq.h>
 
+extern void __init init_IRQ(void);
+
 #endif /* _ASM_RISCV_IRQ_H */
-- 
2.25.1

[PATCH 2/9] riscv: irq: Fix no prototype warning

[Nanyong Sun]

Fix the following W=1 kernel compilation warning:
arch/riscv/kernel/irq.c:19:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
   19 | void __init init_IRQ(void)
      |             ^~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/irq.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
index 9807ad164015..e4c435509983 100644
--- a/arch/riscv/include/asm/irq.h
+++ b/arch/riscv/include/asm/irq.h
@@ -12,4 +12,6 @@
 
 #include <asm-generic/irq.h>
 
+extern void __init init_IRQ(void);
+
 #endif /* _ASM_RISCV_IRQ_H */
-- 
2.25.1


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[PATCH 3/9] riscv: sbi: Fix comment of __sbi_set_timer_v01

[Nanyong Sun]

Fix the comment of __sbi_set_timer_v01, the function name in comment
is missing '__'

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/sbi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
index f4a7db3d309e..d3bf756321a5 100644
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
@@ -116,7 +116,7 @@ void sbi_clear_ipi(void)
 EXPORT_SYMBOL(sbi_clear_ipi);
 
 /**
- * sbi_set_timer_v01() - Program the timer for next timer event.
+ * __sbi_set_timer_v01() - Program the timer for next timer event.
  * @stime_value: The value after which next timer event should fire.
  *
  * Return: None
-- 
2.25.1

[PATCH 3/9] riscv: sbi: Fix comment of __sbi_set_timer_v01

[Nanyong Sun]

Fix the comment of __sbi_set_timer_v01, the function name in comment
is missing '__'

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/sbi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
index f4a7db3d309e..d3bf756321a5 100644
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
@@ -116,7 +116,7 @@ void sbi_clear_ipi(void)
 EXPORT_SYMBOL(sbi_clear_ipi);
 
 /**
- * sbi_set_timer_v01() - Program the timer for next timer event.
+ * __sbi_set_timer_v01() - Program the timer for next timer event.
  * @stime_value: The value after which next timer event should fire.
  *
  * Return: None
-- 
2.25.1


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[PATCH 4/9] riscv: ptrace: Fix no prototype warnings

[Nanyong Sun]

Fix the following W=1 kernel compilation warnings:
arch/riscv/kernel/ftrace.c:186:6: warning: no previous prototype for ‘prepare_ftrace_return’ [-Wmissing-prototypes]
  186 | void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
      |      ^~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/ptrace.c:239:15: warning: no previous prototype for ‘do_syscall_trace_enter’ [-Wmissing-prototypes]
  239 | __visible int do_syscall_trace_enter(struct pt_regs *regs)
      |               ^~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/ptrace.c:262:16: warning: no previous prototype for ‘do_syscall_trace_exit’ [-Wmissing-prototypes]
  262 | __visible void do_syscall_trace_exit(struct pt_regs *regs)
      |                ^~~~~~~~~~~~~~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/ptrace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h
index cb4abb639e8d..09ad4e923510 100644
--- a/arch/riscv/include/asm/ptrace.h
+++ b/arch/riscv/include/asm/ptrace.h
@@ -119,6 +119,11 @@ extern int regs_query_register_offset(const char *name);
 extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 					       unsigned int n);
 
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
+			   unsigned long frame_pointer);
+int do_syscall_trace_enter(struct pt_regs *regs);
+void do_syscall_trace_exit(struct pt_regs *regs);
+
 /**
  * regs_get_register() - get register value from its offset
  * @regs:	pt_regs from which register value is gotten
-- 
2.25.1

[PATCH 4/9] riscv: ptrace: Fix no prototype warnings

[Nanyong Sun]

Fix the following W=1 kernel compilation warnings:
arch/riscv/kernel/ftrace.c:186:6: warning: no previous prototype for ‘prepare_ftrace_return’ [-Wmissing-prototypes]
  186 | void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
      |      ^~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/ptrace.c:239:15: warning: no previous prototype for ‘do_syscall_trace_enter’ [-Wmissing-prototypes]
  239 | __visible int do_syscall_trace_enter(struct pt_regs *regs)
      |               ^~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/ptrace.c:262:16: warning: no previous prototype for ‘do_syscall_trace_exit’ [-Wmissing-prototypes]
  262 | __visible void do_syscall_trace_exit(struct pt_regs *regs)
      |                ^~~~~~~~~~~~~~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/ptrace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h
index cb4abb639e8d..09ad4e923510 100644
--- a/arch/riscv/include/asm/ptrace.h
+++ b/arch/riscv/include/asm/ptrace.h
@@ -119,6 +119,11 @@ extern int regs_query_register_offset(const char *name);
 extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 					       unsigned int n);
 
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
+			   unsigned long frame_pointer);
+int do_syscall_trace_enter(struct pt_regs *regs);
+void do_syscall_trace_exit(struct pt_regs *regs);
+
 /**
  * regs_get_register() - get register value from its offset
  * @regs:	pt_regs from which register value is gotten
-- 
2.25.1


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[PATCH 5/9] riscv: time: Fix no prototype for time_init

[Nanyong Sun]

Fix the following W=1 compilation warning:
arch/riscv/kernel/time.c:16:13: warning: no previous prototype for ‘time_init’ [-Wmissing-prototypes]
   16 | void __init time_init(void)
      |             ^~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/timex.h | 2 ++
 arch/riscv/kernel/time.c       | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
index 81de51e6aa32..507cae273bc6 100644
--- a/arch/riscv/include/asm/timex.h
+++ b/arch/riscv/include/asm/timex.h
@@ -88,4 +88,6 @@ static inline int read_current_timer(unsigned long *timer_val)
 	return 0;
 }
 
+extern void time_init(void);
+
 #endif /* _ASM_RISCV_TIMEX_H */
diff --git a/arch/riscv/kernel/time.c b/arch/riscv/kernel/time.c
index 8a5cf99c0776..1b432264f7ef 100644
--- a/arch/riscv/kernel/time.c
+++ b/arch/riscv/kernel/time.c
@@ -9,6 +9,7 @@
 #include <linux/delay.h>
 #include <asm/sbi.h>
 #include <asm/processor.h>
+#include <asm/timex.h>
 
 unsigned long riscv_timebase;
 EXPORT_SYMBOL_GPL(riscv_timebase);
-- 
2.25.1

[PATCH 5/9] riscv: time: Fix no prototype for time_init

[Nanyong Sun]

Fix the following W=1 compilation warning:
arch/riscv/kernel/time.c:16:13: warning: no previous prototype for ‘time_init’ [-Wmissing-prototypes]
   16 | void __init time_init(void)
      |             ^~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/timex.h | 2 ++
 arch/riscv/kernel/time.c       | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
index 81de51e6aa32..507cae273bc6 100644
--- a/arch/riscv/include/asm/timex.h
+++ b/arch/riscv/include/asm/timex.h
@@ -88,4 +88,6 @@ static inline int read_current_timer(unsigned long *timer_val)
 	return 0;
 }
 
+extern void time_init(void);
+
 #endif /* _ASM_RISCV_TIMEX_H */
diff --git a/arch/riscv/kernel/time.c b/arch/riscv/kernel/time.c
index 8a5cf99c0776..1b432264f7ef 100644
--- a/arch/riscv/kernel/time.c
+++ b/arch/riscv/kernel/time.c
@@ -9,6 +9,7 @@
 #include <linux/delay.h>
 #include <asm/sbi.h>
 #include <asm/processor.h>
+#include <asm/timex.h>
 
 unsigned long riscv_timebase;
 EXPORT_SYMBOL_GPL(riscv_timebase);
-- 
2.25.1


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[PATCH 6/9] riscv: syscall_table: Reduce W=1 compilation warnings noise

[Nanyong Sun]

Building riscv syscall table with W=1 throws the warning as
following pattern:
arch/riscv/kernel/syscall_table.c:14:36: warning: initialized field overwritten [-Woverride-init]
   14 | #define __SYSCALL(nr, call) [nr] = (call),
      |                                    ^
./include/uapi/asm-generic/unistd.h:29:37: note: in expansion of macro ‘__SYSCALL’
   29 | #define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
      |                                     ^~~~~~~~~
./include/uapi/asm-generic/unistd.h:34:1: note: in expansion of macro ‘__SC_COMP’
   34 | __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
      | ^~~~~~~~~
arch/riscv/kernel/syscall_table.c:14:36: note: (near initialization for ‘sys_call_table[0]’)
   14 | #define __SYSCALL(nr, call) [nr] = (call),
      |                                    ^
./include/uapi/asm-generic/unistd.h:29:37: note: in expansion of macro ‘__SYSCALL’
   29 | #define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
      |                                     ^~~~~~~~~
./include/uapi/asm-generic/unistd.h:34:1: note: in expansion of macro ‘__SC_COMP’
   34 | __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
      | ^~~~~~~~~
arch/riscv/kernel/syscall_table.c:14:36: warning: initialized field overwritten [-Woverride-init]
...

Since we intentionally build the syscall tables this way,ignore the warning.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 3dc0abde988a..647a47f5484a 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -8,6 +8,7 @@ CFLAGS_REMOVE_ftrace.o	= $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_patch.o	= $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_sbi.o	= $(CC_FLAGS_FTRACE)
 endif
+CFLAGS_syscall_table.o	+= $(call cc-option,-Wno-override-init,)
 
 extra-y += head.o
 extra-y += vmlinux.lds
-- 
2.25.1

[PATCH 6/9] riscv: syscall_table: Reduce W=1 compilation warnings noise

[Nanyong Sun]

Building riscv syscall table with W=1 throws the warning as
following pattern:
arch/riscv/kernel/syscall_table.c:14:36: warning: initialized field overwritten [-Woverride-init]
   14 | #define __SYSCALL(nr, call) [nr] = (call),
      |                                    ^
./include/uapi/asm-generic/unistd.h:29:37: note: in expansion of macro ‘__SYSCALL’
   29 | #define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
      |                                     ^~~~~~~~~
./include/uapi/asm-generic/unistd.h:34:1: note: in expansion of macro ‘__SC_COMP’
   34 | __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
      | ^~~~~~~~~
arch/riscv/kernel/syscall_table.c:14:36: note: (near initialization for ‘sys_call_table[0]’)
   14 | #define __SYSCALL(nr, call) [nr] = (call),
      |                                    ^
./include/uapi/asm-generic/unistd.h:29:37: note: in expansion of macro ‘__SYSCALL’
   29 | #define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
      |                                     ^~~~~~~~~
./include/uapi/asm-generic/unistd.h:34:1: note: in expansion of macro ‘__SC_COMP’
   34 | __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
      | ^~~~~~~~~
arch/riscv/kernel/syscall_table.c:14:36: warning: initialized field overwritten [-Woverride-init]
...

Since we intentionally build the syscall tables this way,ignore the warning.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 3dc0abde988a..647a47f5484a 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -8,6 +8,7 @@ CFLAGS_REMOVE_ftrace.o	= $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_patch.o	= $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_sbi.o	= $(CC_FLAGS_FTRACE)
 endif
+CFLAGS_syscall_table.o	+= $(call cc-option,-Wno-override-init,)
 
 extra-y += head.o
 extra-y += vmlinux.lds
-- 
2.25.1


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[PATCH 7/9] riscv: process: Fix no prototype for show_regs

[Nanyong Sun]

Include header file to fix the following W=1 compilation warning:
arch/riscv/kernel/process.c:78:6: warning: no previous prototype for ‘show_regs’ [-Wmissing-prototypes]
   78 | void show_regs(struct pt_regs *regs)
      |      ^~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/process.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 6f728e731bed..f9cd57c9c67d 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -10,6 +10,7 @@
 #include <linux/cpu.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/sched/debug.h>
 #include <linux/sched/task_stack.h>
 #include <linux/tick.h>
 #include <linux/ptrace.h>
-- 
2.25.1

[PATCH 7/9] riscv: process: Fix no prototype for show_regs

[Nanyong Sun]

Include header file to fix the following W=1 compilation warning:
arch/riscv/kernel/process.c:78:6: warning: no previous prototype for ‘show_regs’ [-Wmissing-prototypes]
   78 | void show_regs(struct pt_regs *regs)
      |      ^~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/process.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 6f728e731bed..f9cd57c9c67d 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -10,6 +10,7 @@
 #include <linux/cpu.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/sched/debug.h>
 #include <linux/sched/task_stack.h>
 #include <linux/tick.h>
 #include <linux/ptrace.h>
-- 
2.25.1


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[PATCH 8/9] riscv: ftrace: Use ftrace_get_regs helper

[Nanyong Sun]

Use ftrace_get_regs() helper call to get pt_regs from ftrace_regs struct,
this makes the code simpler.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/probes/ftrace.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/arch/riscv/kernel/probes/ftrace.c b/arch/riscv/kernel/probes/ftrace.c
index e6372490aa0b..2dfb33fdac74 100644
--- a/arch/riscv/kernel/probes/ftrace.c
+++ b/arch/riscv/kernel/probes/ftrace.c
@@ -4,37 +4,39 @@
 
 /* Ftrace callback handler for kprobes -- called under preepmt disabed */
 void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
-			   struct ftrace_ops *ops, struct ftrace_regs *regs)
+			   struct ftrace_ops *ops, struct ftrace_regs *fregs)
 {
 	struct kprobe *p;
+	struct pt_regs *regs;
 	struct kprobe_ctlblk *kcb;
 
 	p = get_kprobe((kprobe_opcode_t *)ip);
 	if (unlikely(!p) || kprobe_disabled(p))
 		return;
 
+	regs = ftrace_get_regs(fregs);
 	kcb = get_kprobe_ctlblk();
 	if (kprobe_running()) {
 		kprobes_inc_nmissed_count(p);
 	} else {
-		unsigned long orig_ip = instruction_pointer(&(regs->regs));
+		unsigned long orig_ip = instruction_pointer(regs);
 
-		instruction_pointer_set(&(regs->regs), ip);
+		instruction_pointer_set(regs, ip);
 
 		__this_cpu_write(current_kprobe, p);
 		kcb->kprobe_status = KPROBE_HIT_ACTIVE;
-		if (!p->pre_handler || !p->pre_handler(p, &(regs->regs))) {
+		if (!p->pre_handler || !p->pre_handler(p, regs)) {
 			/*
 			 * Emulate singlestep (and also recover regs->pc)
 			 * as if there is a nop
 			 */
-			instruction_pointer_set(&(regs->regs),
+			instruction_pointer_set(regs,
 				(unsigned long)p->addr + MCOUNT_INSN_SIZE);
 			if (unlikely(p->post_handler)) {
 				kcb->kprobe_status = KPROBE_HIT_SSDONE;
-				p->post_handler(p, &(regs->regs), 0);
+				p->post_handler(p, regs, 0);
 			}
-			instruction_pointer_set(&(regs->regs), orig_ip);
+			instruction_pointer_set(regs, orig_ip);
 		}
 
 		/*
-- 
2.25.1

[PATCH 8/9] riscv: ftrace: Use ftrace_get_regs helper

[Nanyong Sun]

Use ftrace_get_regs() helper call to get pt_regs from ftrace_regs struct,
this makes the code simpler.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/kernel/probes/ftrace.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/arch/riscv/kernel/probes/ftrace.c b/arch/riscv/kernel/probes/ftrace.c
index e6372490aa0b..2dfb33fdac74 100644
--- a/arch/riscv/kernel/probes/ftrace.c
+++ b/arch/riscv/kernel/probes/ftrace.c
@@ -4,37 +4,39 @@
 
 /* Ftrace callback handler for kprobes -- called under preepmt disabed */
 void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
-			   struct ftrace_ops *ops, struct ftrace_regs *regs)
+			   struct ftrace_ops *ops, struct ftrace_regs *fregs)
 {
 	struct kprobe *p;
+	struct pt_regs *regs;
 	struct kprobe_ctlblk *kcb;
 
 	p = get_kprobe((kprobe_opcode_t *)ip);
 	if (unlikely(!p) || kprobe_disabled(p))
 		return;
 
+	regs = ftrace_get_regs(fregs);
 	kcb = get_kprobe_ctlblk();
 	if (kprobe_running()) {
 		kprobes_inc_nmissed_count(p);
 	} else {
-		unsigned long orig_ip = instruction_pointer(&(regs->regs));
+		unsigned long orig_ip = instruction_pointer(regs);
 
-		instruction_pointer_set(&(regs->regs), ip);
+		instruction_pointer_set(regs, ip);
 
 		__this_cpu_write(current_kprobe, p);
 		kcb->kprobe_status = KPROBE_HIT_ACTIVE;
-		if (!p->pre_handler || !p->pre_handler(p, &(regs->regs))) {
+		if (!p->pre_handler || !p->pre_handler(p, regs)) {
 			/*
 			 * Emulate singlestep (and also recover regs->pc)
 			 * as if there is a nop
 			 */
-			instruction_pointer_set(&(regs->regs),
+			instruction_pointer_set(regs,
 				(unsigned long)p->addr + MCOUNT_INSN_SIZE);
 			if (unlikely(p->post_handler)) {
 				kcb->kprobe_status = KPROBE_HIT_SSDONE;
-				p->post_handler(p, &(regs->regs), 0);
+				p->post_handler(p, regs, 0);
 			}
-			instruction_pointer_set(&(regs->regs), orig_ip);
+			instruction_pointer_set(regs, orig_ip);
 		}
 
 		/*
-- 
2.25.1


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[PATCH 9/9] riscv: process: Fix no prototype for arch_dup_task_struct

[Nanyong Sun]

Fix the following W=1 compilation warning:
arch/riscv/kernel/process.c:114:5: warning: no previous prototype for ‘arch_dup_task_struct’ [-Wmissing-prototypes]
  114 | int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
      |     ^~~~~~~~~~~~~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/processor.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 3a240037bde2..021ed64ee608 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -71,6 +71,7 @@ int riscv_of_processor_hartid(struct device_node *node);
 int riscv_of_parent_hartid(struct device_node *node);
 
 extern void riscv_fill_hwcap(void);
+extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
 
 #endif /* __ASSEMBLY__ */
 
-- 
2.25.1

[PATCH 9/9] riscv: process: Fix no prototype for arch_dup_task_struct

[Nanyong Sun]

Fix the following W=1 compilation warning:
arch/riscv/kernel/process.c:114:5: warning: no previous prototype for ‘arch_dup_task_struct’ [-Wmissing-prototypes]
  114 | int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
      |     ^~~~~~~~~~~~~~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/processor.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 3a240037bde2..021ed64ee608 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -71,6 +71,7 @@ int riscv_of_processor_hartid(struct device_node *node);
 int riscv_of_parent_hartid(struct device_node *node);
 
 extern void riscv_fill_hwcap(void);
+extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
 
 #endif /* __ASSEMBLY__ */
 
-- 
2.25.1


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Re: [PATCH 0/9] riscv: misc cleanup

[Palmer Dabbelt]

On Fri, 05 Mar 2021 03:33:23 PST (-0800), sunnanyong@huawei.com wrote:
> Fix some compilation warnings,improve code style
>
> Nanyong Sun (9):
>   riscv: traps: Fix no prototype warnings
>   riscv: irq: Fix no prototype warning
>   riscv: sbi: Fix comment of __sbi_set_timer_v01
>   riscv: ptrace: Fix no prototype warnings
>   riscv: time: Fix no prototype for time_init
>   riscv: syscall_table: Reduce W=1 compilation warnings noise
>   riscv: process: Fix no prototype for show_regs
>   riscv: ftrace: Use ftrace_get_regs helper
>   riscv: process: Fix no prototype for arch_dup_task_struct
>
>  arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
>  arch/riscv/include/asm/irq.h            |  2 ++
>  arch/riscv/include/asm/processor.h      |  1 +
>  arch/riscv/include/asm/ptrace.h         |  5 +++++
>  arch/riscv/include/asm/timex.h          |  2 ++
>  arch/riscv/kernel/Makefile              |  1 +
>  arch/riscv/kernel/probes/ftrace.c       | 16 +++++++++-------
>  arch/riscv/kernel/process.c             |  1 +
>  arch/riscv/kernel/sbi.c                 |  2 +-
>  arch/riscv/kernel/time.c                |  1 +
>  arch/riscv/kernel/traps.c               |  1 +
>  11 files changed, 40 insertions(+), 8 deletions(-)

Thanks.  I fixed the checkpatch warning, these are all on fixes.

Re: [PATCH 0/9] riscv: misc cleanup

[Palmer Dabbelt]

On Fri, 05 Mar 2021 03:33:23 PST (-0800), sunnanyong@huawei.com wrote:
> Fix some compilation warnings,improve code style
>
> Nanyong Sun (9):
>   riscv: traps: Fix no prototype warnings
>   riscv: irq: Fix no prototype warning
>   riscv: sbi: Fix comment of __sbi_set_timer_v01
>   riscv: ptrace: Fix no prototype warnings
>   riscv: time: Fix no prototype for time_init
>   riscv: syscall_table: Reduce W=1 compilation warnings noise
>   riscv: process: Fix no prototype for show_regs
>   riscv: ftrace: Use ftrace_get_regs helper
>   riscv: process: Fix no prototype for arch_dup_task_struct
>
>  arch/riscv/include/asm/asm-prototypes.h | 16 ++++++++++++++++
>  arch/riscv/include/asm/irq.h            |  2 ++
>  arch/riscv/include/asm/processor.h      |  1 +
>  arch/riscv/include/asm/ptrace.h         |  5 +++++
>  arch/riscv/include/asm/timex.h          |  2 ++
>  arch/riscv/kernel/Makefile              |  1 +
>  arch/riscv/kernel/probes/ftrace.c       | 16 +++++++++-------
>  arch/riscv/kernel/process.c             |  1 +
>  arch/riscv/kernel/sbi.c                 |  2 +-
>  arch/riscv/kernel/time.c                |  1 +
>  arch/riscv/kernel/traps.c               |  1 +
>  11 files changed, 40 insertions(+), 8 deletions(-)

Thanks.  I fixed the checkpatch warning, these are all on fixes.

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