linux-kernel - [PATCH 2/5] Use the APIC to determine the hardware processor id

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Message-Id: <1172733419.1498.269.camel@sebastian.intellilink.co.jp>
Date:	Thu, 01 Mar 2007 16:16:59 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	fastboot@...ts.osdl.org, ebiederm@...ssion.com, ak@...e.de,
	akpm@...ux-foundation.org, judith@...ux-foundation.org
Subject: [PATCH 2/5] Use the APIC to determine the hardware processor id -
	i386

Use the APIC to determine the hardware processor id when APIC support
has been selected, independently of whether CONFIG_SMP is set or not.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp>
---

diff -urNp linux-2.6.21-rc2/include/asm-i386/smp.h linux-2.6.21-rc2-hwcpuid/include/asm-i386/smp.h
--- linux-2.6.21-rc2/include/asm-i386/smp.h	2007-03-01 14:02:21.000000000 +0900
+++ linux-2.6.21-rc2-hwcpuid/include/asm-i386/smp.h	2007-03-01 14:08:50.000000000 +0900
@@ -74,20 +74,6 @@ static inline int num_booting_cpus(void)
 	return cpus_weight(cpu_callout_map);
 }
 
-#ifdef CONFIG_X86_LOCAL_APIC
-
-#ifdef APIC_DEFINITION
-extern int hard_smp_processor_id(void);
-#else
-#include <mach_apicdef.h>
-static inline int hard_smp_processor_id(void)
-{
-	/* we don't want to mark this access volatile - bad code generation */
-	return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
-}
-#endif
-#endif
-
 extern int safe_smp_processor_id(void);
 extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
@@ -102,10 +88,23 @@ extern unsigned int num_processors;
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 
-#endif
+#endif /* CONFIG_SMP */
 
 #ifndef __ASSEMBLY__
 
+#ifdef CONFIG_X86_LOCAL_APIC
+#ifdef APIC_DEFINITION
+extern int hard_smp_processor_id(void);
+#else
+#include <mach_apicdef.h>
+static inline int hard_smp_processor_id(void)
+{
+	/* we don't want to mark this access volatile - bad code generation */
+	return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
+}
+#endif /* APIC_DEFINITION */
+#endif /* CONFIG_X86_LOCAL_APIC */
+
 extern u8 apicid_2_node[];
 
 #ifdef CONFIG_X86_LOCAL_APIC


-
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