[PATCH 1/7] omap: iommu: migrate to the generic IOMMU API

[Ohad Ben-Cohen]

On Tue, Aug 23, 2011 at 5:59 PM, Ohad Ben-Cohen <ohad at wizery.com> wrote:
> On Tue, Aug 23, 2011 at 5:07 PM, Roedel, Joerg <Joerg.Roedel at amd.com> wrote:
>> Can this be easily converted to a spin_lock?
>
> Sure, thanks for reviewing.

Taking a second look, I don't think it's necessary - the mutex isn't
used to protect the page table. The page table is protected by a spin
lock, so map/unmap operations can be called from an atomic context.

The mutex is only part of the attach/deattach operations, which are
already used today in process context, so I guess it's safe.