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[PATCH] kdump/i386: apic verification failure fix

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o Removes the unnecessary call to local_irq_disable().

o Kdump was failing while second kernel was coming up. Check for presence
  of boot cpu apic id was failing in (apic_id_registered), hence hitting
  BUG().

o This should not have failed because before calling setup_local_APIC(), it is
  ensured that even if BIOS has not reported boot cpu, then hard set the
  prence of it. Problem happens because of usage of hard_smp_processor_id()
  which is hardcoded to zero in case of non SMP kernel. In kdump case second
  kernel can boot on a cpu whose boot cpu id is not zero.

o Using boot_cpu_physical_apicid instead to hard set the presence of boot cpu.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Vivek Goyal 2005-10-30 14:59:46 -08:00 • committed by Linus Torvalds
parent bda98685b8
commit 009b29d90f
1 changed files with 1 additions and 2 deletions
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3
arch/i386/kernel/apic.c
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@ -1055,7 +1055,6 @@ void __init setup_boot_APIC_clock(void)
using_apic_timer = 1; using_apic_timer = 1;
local_irq_save(flags); local_irq_save(flags);
local_irq_disable();
calibration_result = calibrate_APIC_clock(); calibration_result = calibrate_APIC_clock();
/* /*
@ -1299,7 +1298,7 @@ int __init APIC_init(void)
if (!check_phys_apicid_present(boot_cpu_physical_apicid)) { if (!check_phys_apicid_present(boot_cpu_physical_apicid)) {
printk("weird, boot CPU (#%d) not listed by the BIOS.\n", printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
boot_cpu_physical_apicid); boot_cpu_physical_apicid);
physid_set(hard_smp_processor_id(), phys_cpu_present_map); physid_set(boot_cpu_physical_apicid, phys_cpu_present_map);
} }
/* /*