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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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.text
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.text
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#ifdef __SMP__
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#ifdef CONFIG_SMP
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.global spinlock_arch
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.global spinlock_arch
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#
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#
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# This is a bus-and-hyperthreading-friendly implementation of spinlock
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# This is a bus-and-hyperthreading-friendly implementation of spinlock
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	pushl %ebx
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	pushl %ebx
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	movl 12(%esp),%ebx
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	movl 12(%esp),%ebx
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0:
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0:
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	#ifdef __HT__
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	#ifdef CONFIG_HT
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	pause			# Pentium 4's with HT love this instruction
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	pause			# Pentium 4's with HT love this instruction
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	#endif
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	#endif
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	movl (%ebx),%eax
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	movl (%ebx),%eax
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	testl %eax,%eax
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	testl %eax,%eax
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	jnz 0b			# lightweight looping while it is locked
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	jnz 0b			# lightweight looping while it is locked