From: Shaohua Li <shaohua.li@intel.com>
I'm doing the cpu hotplug stress test and found a variable ('ready') is
overflow after several hundreds rounds of cpu hotplug. Here is a fix.
Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
arch/i386/kernel/head.S | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff -puN arch/i386/kernel/head.S~variable-overflow-after-hundreds-round-of-hotplug-cpu arch/i386/kernel/head.S
--- 25/arch/i386/kernel/head.S~variable-overflow-after-hundreds-round-of-hotplug-cpu Thu Jun 2 16:27:40 2005
+++ 25-akpm/arch/i386/kernel/head.S Thu Jun 2 16:27:40 2005
@@ -299,7 +299,6 @@ is386: movl $2,%ecx # set MP
movl %eax,%cr0
call check_x87
- incb ready
lgdt cpu_gdt_descr
lidt idt_descr
ljmp $(__KERNEL_CS),$1f
@@ -316,8 +315,9 @@ is386: movl $2,%ecx # set MP
lldt %ax
cld # gcc2 wants the direction flag cleared at all times
#ifdef CONFIG_SMP
- movb ready, %cl
- cmpb $1,%cl
+ movb ready, %cl
+ movb $1, ready
+ cmpb $0,%cl
je 1f # the first CPU calls start_kernel
# all other CPUs call initialize_secondary
call initialize_secondary
_