linux-kernel - Re: [PATCH v3 3/5] ACPI/NUMA: Remove architecture dependent remainings

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Message-ID: <20240422174853.0000168c@Huawei.com>
Date: Mon, 22 Apr 2024 17:48:53 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Robert Richter <rrichter@....com>
CC: "Rafael J. Wysocki" <rafael@...nel.org>, Dave Hansen
	<dave.hansen@...ux.intel.com>, Dan Williams <dan.j.williams@...el.com>,
	Alison Schofield <alison.schofield@...el.com>, <linux-acpi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-cxl@...r.kernel.org>, Len Brown
	<lenb@...nel.org>
Subject: Re: [PATCH v3 3/5] ACPI/NUMA: Remove architecture dependent
 remainings

On Fri, 19 Apr 2024 16:02:01 +0200
Robert Richter <rrichter@....com> wrote:

> With the removal of the Itanium architecture [1] the last architecture
> dependent functions:
> 
>  acpi_numa_slit_init(), acpi_numa_memory_affinity_init()
> 
> were removed. Remove its remainings in the header files too an make
> them static.
> 
> [1] commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture")
> 
> Signed-off-by: Robert Richter <rrichter@....com>

The slit change is fine, but what about the cfmws function in here
where a stub was removed as well. Looks sensible as it relied on the
implementation details of acpi_numa_memory_affinity_init() but
should probably call it out in the description and say why it no
longer needs to be protected like this.

Jonathan

> ---
>  drivers/acpi/numa/srat.c | 17 ++---------------
>  include/linux/acpi.h     |  5 -----
>  2 files changed, 2 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
> index 43417b4920da..bd0e2d342ba2 100644
> --- a/drivers/acpi/numa/srat.c
> +++ b/drivers/acpi/numa/srat.c
> @@ -208,13 +208,12 @@ int __init srat_disabled(void)
>  	return acpi_numa < 0;
>  }
>  
> -#if defined(CONFIG_X86) || defined(CONFIG_ARM64) || defined(CONFIG_LOONGARCH)
>  /*
>   * Callback for SLIT parsing.  pxm_to_node() returns NUMA_NO_NODE for
>   * I/O localities since SRAT does not list them.  I/O localities are
>   * not supported at this point.
>   */
> -void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
> +static void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
>  {
>  	int i, j;
>  
> @@ -236,11 +235,7 @@ void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
>  	}
>  }
>  
> -/*
> - * Default callback for parsing of the Proximity Domain <-> Memory
> - * Area mappings
> - */
> -int __init
> +static int __init
>  acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
>  {
>  	u64 start, end;
> @@ -456,14 +451,6 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
>  	(*fake_pxm)++;
>  	return 0;
>  }
> -#else
> -static inline void acpi_table_print_cedt(void) {}
> -static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
> -				   void *arg, const unsigned long table_end)
> -{
> -	return 0;
> -}
> -#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
>  
>  static int __init acpi_parse_slit(struct acpi_table_header *table)
>  {
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 34829f2c517a..2c227b61a452 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -242,9 +242,6 @@ static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc)
>  	return gicc->flags & ACPI_MADT_ENABLED;
>  }
>  
> -/* the following numa functions are architecture-dependent */
> -void acpi_numa_slit_init (struct acpi_table_slit *slit);
> -
>  #if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
>  void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);
>  #else
> @@ -267,8 +264,6 @@ static inline void
>  acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
>  #endif
>  
> -int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
> -
>  #ifndef PHYS_CPUID_INVALID
>  typedef u32 phys_cpuid_t;
>  #define PHYS_CPUID_INVALID (phys_cpuid_t)(-1)