On Mon, Nov 01, 2010 at 08:53:10PM +1300, Michael Cree wrote:
> So, what's the way best forward?
I guess the simplest way to fix that is to use swpipl() call
directly, like this (untested).
Ivan.
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index eda9b90..56ff965 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -37,8 +37,9 @@
*/
extern inline void __set_hae(unsigned long new_hae)
{
- unsigned long flags;
- local_irq_save(flags);
+ unsigned long flags = swpipl(IPL_MAX);
+
+ barrier();
alpha_mv.hae_cache = new_hae;
*alpha_mv.hae_register = new_hae;
@@ -46,7 +47,8 @@ extern inline void __set_hae(unsigned long new_hae)
/* Re-read to make sure it was written. */
new_hae = *alpha_mv.hae_register;
- local_irq_restore(flags);
+ setipl(flags);
+ barrier();
}
extern inline void set_hae(unsigned long new_hae)
--
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