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[PATCH] variable overflow after hundreds round of hotplug CPU

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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>
This commit is contained in:
Shaohua Li
2005-06-25 14:54:49 -07:00
committed by Linus Torvalds
parent a13db56624
commit d92de65cab
1 changed files with 3 additions and 3 deletions
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6
arch/i386/kernel/head.S
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@ -299,7 +299,6 @@ is386: movl $2,%ecx # set MP
movl %eax,%cr0 movl %eax,%cr0
call check_x87 call check_x87
incb ready
lgdt cpu_gdt_descr lgdt cpu_gdt_descr
lidt idt_descr lidt idt_descr
ljmp $(__KERNEL_CS),$1f ljmp $(__KERNEL_CS),$1f
@ -316,8 +315,9 @@ is386: movl $2,%ecx # set MP
lldt %ax lldt %ax
cld # gcc2 wants the direction flag cleared at all times cld # gcc2 wants the direction flag cleared at all times
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
movb ready, %cl movb ready, %cl
cmpb $1,%cl movb $1, ready
cmpb $0,%cl
je 1f # the first CPU calls start_kernel je 1f # the first CPU calls start_kernel
# all other CPUs call initialize_secondary # all other CPUs call initialize_secondary
call initialize_secondary call initialize_secondary