linux-kernel - [PATCH 25/79] [PATCH] initialize map pointers in setup

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Message-Id: <12059476883852-git-send-email-gcosta@redhat.com>
Date:	Wed, 19 Mar 2008 14:25:20 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
	ak@...e.de, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 25/79] [PATCH] initialize map pointers in setup_32.c

From: Glauber Costa <gcosta@...hat.com>

this will serve as a reference as to whether or not to
use the per_cpu variables in mpparse. Done the same way
as x86_64

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 arch/x86/kernel/setup_32.c |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index db9d585..599ce01 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -724,6 +724,18 @@ char * __init __attribute__((weak)) memory_setup(void)
 	return machine_specific_memory_setup();
 }
 
+#ifdef CONFIG_NUMA
+/*
+ * In the golden day, when everything among i386 and x86_64 will be
+ * integrated, this will not live here
+ */
+void *x86_cpu_to_node_map_early_ptr;
+int x86_cpu_to_node_map_init[NR_CPUS] = {
+	[0 ... NR_CPUS-1] = NUMA_NO_NODE
+};
+DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
+#endif
+
 /*
  * Determine if we were loaded by an EFI loader.  If so, then we have also been
  * passed the efi memmap, systab, etc., so we should use these data structures
@@ -856,6 +868,18 @@ void __init setup_arch(char **cmdline_p)
 
 	io_delay_init();
 
+#ifdef CONFIG_X86_SMP
+	/*
+	 * setup to use the early static init tables during kernel startup
+	 * X86_SMP will exclude sub-arches that don't deal well with it.
+	 */
+	x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
+	x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
+#ifdef CONFIG_NUMA
+	x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
+#endif
+#endif
+
 #ifdef CONFIG_X86_GENERICARCH
 	generic_apic_probe();
 #endif
-- 
1.5.0.6

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