[PATCH][TRIVIAL] iommu: Include linux/err.h

[Wang YanQing]

The linux/iommu.h header uses ERR_PTR defined
in linux/err.h but doesn't include it.

Reviewed-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Wang YanQing <udknight@xxxxxxxxx>
---
 I send this twice to joerg.roedel@xxxxxxx more than one
 month, but it had been ignored, I don't why.

 include/linux/iommu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index f3b99e1..f4a49a6 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -20,6 +20,7 @@
 #define __LINUX_IOMMU_H
 
 #include <linux/errno.h>
+#include <linux/err.h>
 #include <linux/types.h>
 
 #define IOMMU_READ	(1)
-- 
1.7.11.1.116.g8228a23
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