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SubjectRe: [PATCH linux-next v9 1/7] nds32: fix asm/syscall.h
Dmitry V. Levin <ldv@altlinux.org> 於 2019年4月9日 週二 上午1:41寫道:
>
> All syscall_get_*() and syscall_set_*() functions must be defined
> as static inline as on all other architectures, otherwise asm/syscall.h
> cannot be included in more than one compilation unit.
>
> This bug has to be fixed in order to extend the generic
> ptrace API with PTRACE_GET_SYSCALL_INFO request.
>
> Reported-by: kbuild test robot <lkp@intel.com>
> Fixes: 1932fbe36e02 ("nds32: System calls handling")
> Cc: Greentime Hu <green.hu@gmail.com>
> Cc: Vincent Chen <deanbo422@gmail.com>
> Cc: Elvira Khabirova <lineprinter@altlinux.org>
> Cc: Eugene Syromyatnikov <esyr@redhat.com>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Cc: Andy Lutomirski <luto@kernel.org>
> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
> ---
>
> Dear nds32 maintainers, this fix is waiting for ACK since early January.
>
> Notes:
> v9: rebased to linux-next again due to syscall_get_arguments() signature change
> v8: unchanged
> v7: initial revision
>
> arch/nds32/include/asm/syscall.h | 27 +++++++++++++++++----------
> 1 file changed, 17 insertions(+), 10 deletions(-)
>
> diff --git a/arch/nds32/include/asm/syscall.h b/arch/nds32/include/asm/syscall.h
> index 174b8571d362..d08439a54034 100644
> --- a/arch/nds32/include/asm/syscall.h
> +++ b/arch/nds32/include/asm/syscall.h
> @@ -26,7 +26,8 @@ struct pt_regs;
> *
> * It's only valid to call this when @task is known to be blocked.
> */
> -int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
> +static inline int
> +syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
> {
> return regs->syscallno;
> }
> @@ -47,7 +48,8 @@ int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
> * system call instruction. This may not be the same as what the
> * register state looked like at system call entry tracing.
> */
> -void syscall_rollback(struct task_struct *task, struct pt_regs *regs)
> +static inline void
> +syscall_rollback(struct task_struct *task, struct pt_regs *regs)
> {
> regs->uregs[0] = regs->orig_r0;
> }
> @@ -62,7 +64,8 @@ void syscall_rollback(struct task_struct *task, struct pt_regs *regs)
> * It's only valid to call this when @task is stopped for tracing on exit
> * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
> */
> -long syscall_get_error(struct task_struct *task, struct pt_regs *regs)
> +static inline long
> +syscall_get_error(struct task_struct *task, struct pt_regs *regs)
> {
> unsigned long error = regs->uregs[0];
> return IS_ERR_VALUE(error) ? error : 0;
> @@ -79,7 +82,8 @@ long syscall_get_error(struct task_struct *task, struct pt_regs *regs)
> * It's only valid to call this when @task is stopped for tracing on exit
> * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
> */
> -long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
> +static inline long
> +syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
> {
> return regs->uregs[0];
> }
> @@ -99,8 +103,9 @@ long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
> * It's only valid to call this when @task is stopped for tracing on exit
> * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
> */
> -void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
> - int error, long val)
> +static inline void
> +syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
> + int error, long val)
> {
> regs->uregs[0] = (long)error ? error : val;
> }
> @@ -118,8 +123,9 @@ void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
> * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
> */
> #define SYSCALL_MAX_ARGS 6
> -void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
> - unsigned long *args)
> +static inline void
> +syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
> + unsigned long *args)
> {
> args[0] = regs->orig_r0;
> args++;
> @@ -138,8 +144,9 @@ void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
> * It's only valid to call this when @task is stopped for tracing on
> * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
> */
> -void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
> - const unsigned long *args)
> +static inline void
> +syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
> + const unsigned long *args)
> {
> regs->orig_r0 = args[0];
> args++;

Sorry for late.
Acked-by: Greentime Hu <greentime@andestech.com>

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