[PATCH -next] dmar: fix build warnings when ACPI is not enabled

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxx>

Fix build warnings when CONFIG_ACPI is not enabled:

include/linux/dmar.h:248:46: warning: 'struct acpi_dmar_header' declared inside parameter list
include/linux/dmar.h:248:46: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/dmar.h:252:46: warning: 'struct acpi_dmar_header' declared inside parameter list

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
---
 include/linux/dmar.h |    2 ++
 1 file changed, 2 insertions(+)

--- next-2011-0927.orig/include/linux/dmar.h
+++ next-2011-0927/include/linux/dmar.h
@@ -244,6 +244,8 @@ extern int dmar_parse_dev_scope(void *st
 				struct pci_dev ***devices, u16 segment);
 extern int intel_iommu_init(void);
 #else /* !CONFIG_INTEL_IOMMU: */
+struct acpi_dmar_header;
+
 static inline int intel_iommu_init(void) { return -ENODEV; }
 static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
 {
--
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