Spinlocks on Uniprocessor

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Subject: Spinlocks on Uniprocessor
From: "Mansha Linux" <mansha.linux@xxxxxxxxx>
Date: Wed, 19 Sep 2007 11:08:08 +0530

Hi all,

Could you please explain me why do we need the spinlocks on uniprocessor machines?
Is this the only reason that the kernel is preemptive ?
--
regards,
Mansha

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