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Commit d92de65c authored by Shaohua Li's avatar Shaohua Li Committed by Linus Torvalds
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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: default avatarShaohua <Li&lt;shaohua.li@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a13db566

arch/i386/kernel/head.S

+3 −3
Original line number Diff line number Diff line
@@ -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
@@ -317,7 +316,8 @@ is386: movl $2,%ecx # set MP 
	cld			# gcc2 wants the direction flag cleared at all times

#ifdef CONFIG_SMP

	movb ready, %cl

	cmpb $1,%cl

	movb $1, ready

	cmpb $0,%cl

	je 1f			# the first CPU calls start_kernel

				# all other CPUs call initialize_secondary

	call initialize_secondary