From: Ashok Raj <ashok.raj@intel.com>
Date: Sun, 20 Nov 2005 17:49:06 +0000 (+0100)
Subject: [PATCH] Register disabled CPUs
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fbe83e209ad9c8281e29ac17a60f91119d86fa8c;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH] Register disabled CPUs

Needed to make the earlier use disabled CPUs for CPU hotplug patch
actually work.

Need to register disabled processors as well, so we can count them
towards cpu_possible_map as hot pluggable cpus.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index f36677241ec..76b1135d401 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -248,9 +248,7 @@ acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
 
 	acpi_table_print_madt_entry(header);
 
-	/* no utility in registering a disabled processor */
-	if (processor->flags.enabled == 0)
-		return 0;
+	/* Register even disabled CPUs for cpu hotplug */
 
 	x86_acpiid_to_apicid[processor->acpi_id] = processor->id;