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[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>
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1 changed files with 3 additions and 3 deletions
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@ -299,7 +299,6 @@ is386: movl $2,%ecx # set MP
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movl %eax,%cr0
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call check_x87
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incb ready
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lgdt cpu_gdt_descr
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lidt idt_descr
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ljmp $(__KERNEL_CS),$1f
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@ -316,8 +315,9 @@ is386: movl $2,%ecx # set MP
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lldt %ax
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cld # gcc2 wants the direction flag cleared at all times
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#ifdef CONFIG_SMP
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movb ready, %cl
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cmpb $1,%cl
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movb ready, %cl
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movb $1, ready
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cmpb $0,%cl
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je 1f # the first CPU calls start_kernel
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# all other CPUs call initialize_secondary
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call initialize_secondary
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