Re: Can we hold a spin lock and call up() (on a semaphore)

[Naveed Latif <kernelmail.naveed@xxxxxxxxx>]

Hi,
  In Process cotext you can hold spin_lock and also you can up()..  And its better to use spin_lock_irqsave intead of spin_lock in process context..

Naveed Latif

On 2/8/06, Hareesh Nagarajan <hareesh.nagarajan@xxxxxxxxx> wrote:

Hi:

In process context (and interrupt context, while we are at it) can we
hold a spin lock and call up() (on a semaphore)? Apart from the usual
issues pertaining with deadlocks - are we guaranteed that an up is a
non-blocking operation?

Thanks,

Hareesh

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