From: sridharv@ufl.edu
To: linux-kernel@vger.kernel.org
Subject: Re: interrupt - spin lock question
Date: Mon, 4 Mar 2002 01:33:30 -0500 [thread overview]
Message-ID: <1015223610.3c83153a33024@webmail.health.ufl.edu> (raw)
In-Reply-To: <1015219129.3c8303b9e87a7@webmail.health.ufl.edu> <1015219669.868.35.camel@phantasy>
In-Reply-To: <1015219669.868.35.camel@phantasy>
> Right, that is why you would use a spin_lock ! :)
>
> Further, you would want to use a spin_lock_irq and related friends. The
> irq disable prevents the race wrt interrupts and the spin_lock prevents
> racing wrt SMP.
>
ok things are clear now. so the spin_lock_irq friends are actually for 2
purposes - preventing racing from interrupts and from SMP. so if SMP is not
chosen only the local_irq_disable() part works right??
do { local_irq_disable(); spin_lock(lock); } while (0)
next prev parent reply other threads:[~2002-03-04 6:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-04 5:18 sridharv
2002-03-04 5:27 ` Robert Love
2002-03-04 6:33 ` sridharv [this message]
2002-03-04 7:19 ` Robert Love
2002-03-04 6:32 ` Kittur Sameer
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