[PATCH v3 12/15] powerpc: ftrace_enabled helper

[Christophe Leroy]

Le 07/04/2020 à 07:16, Nicholas Piggin a écrit :
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Reviewed-by: Christophe Leroy <christophe.leroy at c-s.fr>


> ---
>   arch/powerpc/include/asm/ftrace.h | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h
> index f54a08a2cd70..bc76970b6ee5 100644
> --- a/arch/powerpc/include/asm/ftrace.h
> +++ b/arch/powerpc/include/asm/ftrace.h
> @@ -108,9 +108,23 @@ static inline void this_cpu_enable_ftrace(void)
>   {
>   	get_paca()->ftrace_enabled = 1;
>   }
> +
> +/* Disable ftrace on this CPU if possible (may not be implemented) */
> +static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
> +{
> +	get_paca()->ftrace_enabled = ftrace_enabled;
> +}
> +
> +static inline u8 this_cpu_get_ftrace_enabled(void)
> +{
> +	return get_paca()->ftrace_enabled;
> +}
> +
>   #else /* CONFIG_PPC64 */
>   static inline void this_cpu_disable_ftrace(void) { }
>   static inline void this_cpu_enable_ftrace(void) { }
> +static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
> +static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
>   #endif /* CONFIG_PPC64 */
>   #endif /* !__ASSEMBLY__ */
>   
>