Control: tag -1 patch moreinfo Also, does this patch fix the crash? (Instructions for rebuilding the package are at <https://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official>.)
Ben. -- Ben Hutchings For every complex problem there is a solution that is simple, neat, and wrong.
From 21285bd44b2144b121eeb35abed99fa6ece2a5a4 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <b...@decadent.org.uk>
Date: Mon, 24 Oct 2016 03:05:42 +0100
Subject: [PATCH] Revert "arch/x86: Handle non enumerated CPU after physical
hotplug"
This reverts commit 4927f9e7a267883ca0741d3fefa063faf43a9344, which
was commit 2a51fe083eba7f99cbda72f5ef90cdf2f4df882c upstream.
---
arch/x86/kernel/smpboot.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 82b17373b66a..75a045424be7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1406,21 +1406,9 @@ __init void prefill_possible_map(void)
{
int i, possible;
- /* No boot processor was found in mptable or ACPI MADT */
- if (!num_processors) {
- int apicid = boot_cpu_physical_apicid;
- int cpu = hard_smp_processor_id();
-
- pr_warn("Boot CPU (id %d) not listed by BIOS\n", cpu);
-
- /* Make sure boot cpu is enumerated */
- if (apic->cpu_present_to_apicid(0) == BAD_APICID &&
- apic->apic_id_valid(apicid))
- generic_processor_info(apicid, boot_cpu_apic_version);
-
- if (!num_processors)
- num_processors = 1;
- }
+ /* no processor from mptable or madt */
+ if (!num_processors)
+ num_processors = 1;
i = setup_max_cpus ?: 1;
if (setup_possible_cpus == -1) {
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