[hrm - should read whole threads before replying]
>
> So a u32 flags with
>
> flags = acpi_os_acquire_lock(lock);
>
> would be safe, unless a 64 bit machine stored the value of IR in the upper
> word, which I don't know of any archs that do that.
At least on x86-64 it should be ok.
-Andi
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