Re: [PATCH v7 14/15] arm64, acpi, numa: NUMA support based on SRAT and SLIT

Catalin Marinas
2016-08-15T15:35:55Z

On Tue, May 24, 2016 at 03:35:44PM -0700, David Daney wrote:
> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
> index aee323b..4b13ecd 100644
> --- a/arch/arm64/include/asm/acpi.h
> +++ b/arch/arm64/include/asm/acpi.h
> @@ -113,4 +113,12 @@ static inline const char *acpi_get_enable_method(int cpu)
> pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
> #endif
>
> +#ifdef CONFIG_ACPI_NUMA
> +int arm64_acpi_numa_init(void);
> +int acpi_numa_get_nid(unsigned int cpu, u64 hwid);
> +#else
> +static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
> +static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; }
> +#endif /* CONFIG_ACPI_NUMA */
> +
> #endif /*_ASM_ACPI_H*/

Apparently this doesn't always build since asm/acpi.h is conditionally
included from linux/acpi.h only when CONFIG_ACPI is enabled. Disabling
this option on arm64 leads to:

arch/arm64/mm/numa.c: In function ‘arm64_numa_init’:
arch/arm64/mm/numa.c:395:24: error: ‘arm64_acpi_numa_init’ undeclared (first use in this function)
if (!acpi_disabled && !numa_init(arm64_acpi_numa_init))

I'll fix it in arch/arm64 by including asm/acpi.h directly as we do in a
couple of other files:

------------------8<------------------------------
>From 9a83bf400e0b4ef066b83eeaecdbca909b8491ea Mon Sep 17 00:00:00 2001
From: Catalin Marinas <catalin.marinas@arm.com>
Date: Mon, 15 Aug 2016 16:33:10 +0100
Subject: [PATCH] arm64: Fix NUMA build error when !CONFIG_ACPI
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since asm/acpi.h is only included by linux/acpi.h when CONFIG_ACPI is
enabled, disabling the latter leads to the following build error on
arm64:

arch/arm64/mm/numa.c: In function ‘arm64_numa_init’:
arch/arm64/mm/numa.c:395:24: error: ‘arm64_acpi_numa_init’ undeclared (first use in this function)
if (!acpi_disabled && !numa_init(arm64_acpi_numa_init))

This patch include the asm/acpi.h explicitly in arch/arm64/mm/numa.c for
the arm64_acpi_numa_init() definition.

Fixes: d8b47fca8c23 ("arm64, ACPI, NUMA: NUMA support based on SRAT and SLIT")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm64/mm/numa.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index c7fe3ec70774..5bb15eab6f00 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -23,6 +23,8 @@
#include <linux/module.h>
#include <linux/of.h>

+#include <asm/acpi.h>
+
struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);
nodemask_t numa_nodes_parsed __initdata;