linux-kernel - [PATCH 60/79] [PATCH] add callin tests to cpu

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Date:	Wed, 19 Mar 2008 14:25:55 -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 60/79] [PATCH] add callin tests to cpu_up

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

Now that we boot cpus here, callin_map has this meaning (same
as x86_64)

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 arch/x86/kernel/smpboot_32.c |   20 +++++++++++++-------
 1 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c
index 4ba5ab2..33758a2 100644
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -839,6 +839,7 @@ int __cpuinit native_cpu_up(unsigned int cpu)
 {
 	int apicid = cpu_present_to_apicid(cpu);
 	unsigned long flags;
+	int err;
 
 	WARN_ON(irqs_disabled());
 
@@ -851,6 +852,14 @@ int __cpuinit native_cpu_up(unsigned int cpu)
 	}
 
 	/*
+	 * Already booted CPU?
+	 */
+	if (cpu_isset(cpu, cpu_callin_map)) {
+		Dprintk("do_boot_cpu %d Already started\n", cpu);
+		return -ENOSYS;
+	}
+
+	/*
 	 * Save current MTRR state in case it was changed since early boot
 	 * (e.g. by the ACPI SMI) to initialize new CPUs with MTRRs in sync:
 	 */
@@ -863,15 +872,12 @@ int __cpuinit native_cpu_up(unsigned int cpu)
 			min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));
 	flush_tlb_all();
 
-	do_boot_cpu(apicid, cpu);
-
-	/* In case one didn't come up */
-	if (!cpu_isset(cpu, cpu_callin_map)) {
-		printk(KERN_DEBUG "skipping cpu%d, didn't come online\n", cpu);
-		return -EIO;
+	err = do_boot_cpu(apicid, cpu);
+	if (err < 0) {
+		Dprintk("do_boot_cpu failed %d\n", err);
+		return err;
 	}
 
-
 	/*
 	 * Check TSC synchronization with the AP (keep irqs disabled
 	 * while doing so):
-- 
1.5.0.6

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