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How spin_lock_irqsave works?

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From: arun c <arun.edarath@...>
To: <kernelnewbies@...>
Subject: How spin_lock_irqsave works?
Date: Tuesday, August 26, 2008 - 3:26 am

Hi,

The spin_lock_irqsave uses an "unsigned long flags" variable to
save the irq state. But if the cpu has more that 64 interrupts,
how this save and restore is happening? ( For eg: Arm has 96 interrupts)

Regards,
Arun C

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How spin_lock_irqsave works?, arun c, (Tue Aug 26, 3:26 am)