linux-kernel - Re: Voyager phys_cpu_present

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Date:	Mon, 21 Apr 2008 22:14:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Alexey Starikovskiy <astarikovskiy@...e.de>, tglx@...utronix.de,
	hpa@...or.com, James.Bottomley@...senPartnership.com,
	linux-kernel@...r.kernel.org
Subject: Re: Voyager phys_cpu_present_map compile error


* Adrian Bunk <bunk@...nel.org> wrote:

> > +#ifndef CONFIG_X86_VOYAGER
> >  /* Bitmask of physically existing CPUs */
> >  physid_mask_t phys_cpu_present_map;
> > +#endif
> >...
> 
> Alexey noted that phys_cpu_present_map for Voyager and !Voyager also 
> have different types and suggested to make the Voyager one static 
> instead (additional renaming of the Voyager one also makes sense).

yep, done by the patch below.

	Ingo

------------>
Subject: x86: make phys_cpu_present_map static in Voyager
From: Alexey Starikovskiy <astarikovskiy@...e.de>
Date: Tue, 22 Apr 2008 00:03:14 +0400

Signed-off-by: Alexey Starikovskiy <astarikovskiy@...e.de>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/mach-voyager/voyager_smp.c |   24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

Index: linux-x86.q/arch/x86/mach-voyager/voyager_smp.c
===================================================================
--- linux-x86.q.orig/arch/x86/mach-voyager/voyager_smp.c
+++ linux-x86.q/arch/x86/mach-voyager/voyager_smp.c
@@ -74,7 +74,7 @@ EXPORT_SYMBOL(cpu_online_map);
 
 /* Bitmask of CPUs present in the system - exported by i386_syms.c, used
  * by scheduler but indexed physically */
-cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
+static cpumask_t voyager_phys_cpu_present_map = CPU_MASK_NONE;
 
 /* The internal functions */
 static void send_CPI(__u32 cpuset, __u8 cpi);
@@ -378,19 +378,19 @@ void __init find_smp_config(void)
 	/* set up everything for just this CPU, we can alter
 	 * this as we start the other CPUs later */
 	/* now get the CPU disposition from the extended CMOS */
-	cpus_addr(phys_cpu_present_map)[0] =
+	cpus_addr(voyager_phys_cpu_present_map)[0] =
 	    voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK);
-	cpus_addr(phys_cpu_present_map)[0] |=
+	cpus_addr(voyager_phys_cpu_present_map)[0] |=
 	    voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 1) << 8;
-	cpus_addr(phys_cpu_present_map)[0] |=
+	cpus_addr(voyager_phys_cpu_present_map)[0] |=
 	    voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK +
 				       2) << 16;
-	cpus_addr(phys_cpu_present_map)[0] |=
+	cpus_addr(voyager_phys_cpu_present_map)[0] |=
 	    voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK +
 				       3) << 24;
-	cpu_possible_map = phys_cpu_present_map;
-	printk("VOYAGER SMP: phys_cpu_present_map = 0x%lx\n",
-	       cpus_addr(phys_cpu_present_map)[0]);
+	cpu_possible_map = voyager_phys_cpu_present_map;
+	printk("VOYAGER SMP: voyager_phys_cpu_present_map = 0x%lx\n",
+	       cpus_addr(voyager_phys_cpu_present_map)[0]);
 	/* Here we set up the VIC to enable SMP */
 	/* enable the CPIs by writing the base vector to their register */
 	outb(VIC_DEFAULT_CPI_BASE, VIC_CPI_BASE_REGISTER);
@@ -649,15 +649,15 @@ void __init smp_boot_cpus(void)
 		/* now that the cat has probed the Voyager System Bus, sanity
 		 * check the cpu map */
 		if (((voyager_quad_processors | voyager_extended_vic_processors)
-		     & cpus_addr(phys_cpu_present_map)[0]) !=
-		    cpus_addr(phys_cpu_present_map)[0]) {
+		     & cpus_addr(voyager_phys_cpu_present_map)[0]) !=
+		    cpus_addr(voyager_phys_cpu_present_map)[0]) {
 			/* should panic */
 			printk("\n\n***WARNING*** "
 			       "Sanity check of CPU present map FAILED\n");
 		}
 	} else if (voyager_level == 4)
 		voyager_extended_vic_processors =
-		    cpus_addr(phys_cpu_present_map)[0];
+		    cpus_addr(voyager_phys_cpu_present_map)[0];
 
 	/* this sets up the idle task to run on the current cpu */
 	voyager_extended_cpus = 1;
@@ -689,7 +689,7 @@ void __init smp_boot_cpus(void)
 	/* loop over all the extended VIC CPUs and boot them.  The
 	 * Quad CPUs must be bootstrapped by their extended VIC cpu */
 	for (i = 0; i < NR_CPUS; i++) {
-		if (i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map))
+		if (i == boot_cpu_id || !cpu_isset(i, voyager_phys_cpu_present_map))
 			continue;
 		do_boot_cpu(i);
 		/* This udelay seems to be needed for the Quad boots
--
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