From e2c0388866dc12bef56b178b958f9b778fe6c687 Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@suse.de>
Date: Sun, 26 Feb 2006 04:18:46 +0100
Subject: [PATCH] [PATCH] x86_64: Fix the additional_cpus=.. option
It didn't set up the CPU possible map early enough, so the
option didn't actually work.
Noticed by Heiko Carstens
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/x86_64/kernel/setup.c | 6 ++++++
arch/x86_64/kernel/smpboot.c | 2 +-
include/asm-x86_64/proto.h | 1 +
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 9435ab7d6fb83..5de7eaf5d97cd 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -423,6 +423,12 @@ static __init void parse_cmdline_early (char ** cmdline_p)
else if(!memcmp(from, "elfcorehdr=", 11))
elfcorehdr_addr = memparse(from+11, &from);
#endif
+
+#ifdef CONFIG_SMP
+ else if (!memcmp(from, "additional_cpus=", 16))
+ setup_additional_cpus(from+16);
+#endif
+
next_char:
c = *(from++);
if (!c)
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 67e4e28f4df8d..b82eb86e4f5de 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -1244,7 +1244,7 @@ void __cpu_die(unsigned int cpu)
printk(KERN_ERR "CPU %u didn't die...\n", cpu);
}
-static __init int setup_additional_cpus(char *s)
+__init int setup_additional_cpus(char *s)
{
return get_option(&s, &additional_cpus);
}
diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h
index eca3f2d633dbb..8bdcbd0aa03f5 100644
--- a/include/asm-x86_64/proto.h
+++ b/include/asm-x86_64/proto.h
@@ -134,6 +134,7 @@ extern int force_iommu;
extern int reboot_force;
extern int notsc_setup(char *);
+extern int setup_additional_cpus(char *);
extern void smp_local_timer_interrupt(struct pt_regs * regs);