[PATCH v2] ACPI: introduce acpi_arch_init

[Sunil V L]

On Wed, Aug 07, 2024 at 02:36:12PM +0800, Miao Wang via B4 Relay wrote:
> From: Miao Wang <shankerwangmiao at gmail.com>
> 
> To avoid arch-specific code in general ACPI initialization flow,
> we introduce a weak symbol acpi_arch_init. Currently, arm64 can
> utillize this to insert its specific flow. In the future,
> other architectures can also have chance to define their own
> arch-specific acpi initialization process if necessary.
> 
> Signed-off-by: Miao Wang <shankerwangmiao at gmail.com>
> ---
> Changes from v1
> - Change acpi_arch_init from a static inline stub to a weak function
>   according to Haijun Guo's advice
> ---
>  drivers/acpi/arm64/init.c | 2 +-
>  drivers/acpi/bus.c        | 4 +++-
>  include/linux/acpi.h      | 6 +-----
>  3 files changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/acpi/arm64/init.c b/drivers/acpi/arm64/init.c
> index d0c8aed90fd1..7a47d8095a7d 100644
> --- a/drivers/acpi/arm64/init.c
> +++ b/drivers/acpi/arm64/init.c
> @@ -2,7 +2,7 @@
>  #include <linux/acpi.h>
>  #include "init.h"
>  
> -void __init acpi_arm_init(void)
> +void __init acpi_arch_init(void)
>  {
>  	if (IS_ENABLED(CONFIG_ACPI_AGDI))
>  		acpi_agdi_init();
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 284bc2e03580..b47541e45a5a 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -1431,6 +1431,8 @@ static int __init acpi_bus_init(void)
>  struct kobject *acpi_kobj;
>  EXPORT_SYMBOL_GPL(acpi_kobj);
>  
> +void __weak acpi_arch_init(void) { }
> +
>  static int __init acpi_init(void)
>  {
>  	int result;
> @@ -1458,7 +1460,7 @@ static int __init acpi_init(void)
>  	acpi_viot_early_init();
>  	acpi_hest_init();
>  	acpi_ghes_init();
> -	acpi_arm_init();
> +	acpi_arch_init();
>  	acpi_scan_init();
>  	acpi_ec_init();
>  	acpi_debugfs_init();
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 0687a442fec7..52862c377747 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -1523,11 +1523,7 @@ static inline int find_acpi_cpu_topology_hetero_id(unsigned int cpu)
>  }
>  #endif
>  
> -#ifdef CONFIG_ARM64
> -void acpi_arm_init(void);
> -#else
> -static inline void acpi_arm_init(void) { }
> -#endif
> +void acpi_arch_init(void);
>  
LGTM.

Reviewed-by: Sunil V L <sunilvl at ventanamicro.com>

Thanks,
Sunil