[PATCH] variable overflow after hundreds round of hotplug CPU

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>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index e966fc8c44c4..4477bb107098 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -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