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Subject[PATCH] parisc: fix longstanding build failure on prefetch
Upstream commit e66eed651fd18a961f11cda62f3b5286c8cc4f9f

"list: remove prefetching from regular list iterators"

removed <linux/prefetch.h> from <linux/list.h> very early in the
v3.0 dev cycle (v2.6.39-2-ge66eed6), thereby causing build failures
when it exposed the implicit prefetch users in parisc.

Reported-by: David Rientjes <>
Reported-by: WANG Cong <>
Signed-off-by: Paul Gortmaker <>

[ The parisc defconfig has been failing to build everywhere since
last May! And this
one liner fix was reported last
Oct, and again
in early Feb. So, now with a clear reasoning in the commit header as
to why it fails, can we finally get this in tree please? ]

diff --git a/drivers/parisc/iommu-helpers.h b/drivers/parisc/iommu-helpers.h
index a9c46cc..8c33491 100644
--- a/drivers/parisc/iommu-helpers.h
+++ b/drivers/parisc/iommu-helpers.h
@@ -1,3 +1,5 @@
+#include <linux/prefetch.h>
* iommu_fill_pdir - Insert coalesced scatter/gather chunks into the I/O Pdir.
* @ioc: The I/O Controller.

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