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Date: Fri, 22 Feb 2013 13:44:45 +0800
From: liguang <lig.fnst@...fujitsu.com>
To: linux-kernel@...r.kernel.org, rientjes@...gle.com, x86@...nel.org
Cc: liguang <lig.fnst@...fujitsu.com>
Subject: [rebased][PATCH 2/4] numa: avoid export acpi_numa variable
acpi_numa is used to prevent srat table
being parsed, seems a little miss-named,
if 'noacpi' was specified by cmdline and
CONFIG_ACPI_NUMA was enabled, acpi_numa
will be operated directly from everywhere
it needed to disable/enable numa in acpi
mode which was a bad thing, so, try to
export a fuction to get srat table
enable/disable info.
Signed-off-by: liguang <lig.fnst@...fujitsu.com>
---
arch/x86/include/asm/acpi.h | 2 +-
arch/x86/kernel/acpi/srat.c | 21 +++++++++++++--------
arch/x86/mm/numa.c | 2 +-
arch/x86/xen/enlighten.c | 2 +-
4 files changed, 16 insertions(+), 11 deletions(-)
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index b31bf97..449e12a 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -177,7 +177,7 @@ static inline void disable_acpi(void) { }
#define ARCH_HAS_POWER_INIT 1
#ifdef CONFIG_ACPI_NUMA
-extern int acpi_numa;
+extern void disable_acpi_numa(void);
extern int x86_acpi_numa_init(void);
#endif /* CONFIG_ACPI_NUMA */
diff --git a/arch/x86/kernel/acpi/srat.c b/arch/x86/kernel/acpi/srat.c
index b20b5b7..469a0af 100644
--- a/arch/x86/kernel/acpi/srat.c
+++ b/arch/x86/kernel/acpi/srat.c
@@ -24,22 +24,27 @@
#include <asm/apic.h>
#include <asm/uv/uv.h>
-int acpi_numa __initdata;
+static bool acpi_numa __initdata;
static __init int setup_node(int pxm)
{
return acpi_map_pxm_to_node(pxm);
}
-static __init void bad_srat(void)
+void __init disable_acpi_numa(void)
{
- printk(KERN_ERR "SRAT: SRAT not used.\n");
- acpi_numa = -1;
+ acpi_numa = false;
}
-static __init inline int srat_disabled(void)
+static void __init bad_srat(void)
{
- return acpi_numa < 0;
+ disable_acpi_numa();
+ printk(KERN_ERR "SRAT: SRAT will not be used.\n");
+}
+
+static bool __init srat_disabled(void)
+{
+ return acpi_numa == false;
}
/* Callback for SLIT parsing */
@@ -88,7 +93,7 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
}
set_apicid_to_node(apic_id, node);
node_set(node, numa_nodes_parsed);
- acpi_numa = 1;
+ acpi_numa = true;
printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
pxm, apic_id, node);
}
@@ -130,7 +135,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
set_apicid_to_node(apic_id, node);
node_set(node, numa_nodes_parsed);
- acpi_numa = 1;
+ acpi_numa = true;
printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
pxm, apic_id, node);
}
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 3545585..62e3b2a 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -47,7 +47,7 @@ static __init int numa_setup(char *opt)
#endif
#ifdef CONFIG_ACPI_NUMA
if (!strncmp(opt, "noacpi", 6))
- acpi_numa = -1;
+ disable_acpi_numa();
#endif
return 0;
}
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index bd4c134..724ac84 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1447,7 +1447,7 @@ asmlinkage void __init xen_start_kernel(void)
* any NUMA information the kernel tries to get from ACPI will
* be meaningless. Prevent it from trying.
*/
- acpi_numa = -1;
+ disable_acpi_numa();
#endif
/* Don't do the full vcpu_info placement stuff until we have a
--
1.7.2.5
--
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