[PATCH 01/10] iommu/core: Define iommu_ops and register_iommu only with CONFIG_IOMMU_API

Joerg Roedel
2011-09-07T15:41:44Z

This makes it impossible to compile an iommu driver into the
kernel without selecting CONFIG_IOMMU_API.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
include/linux/iommu.h | 8 +++-----
1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 9940319..6470cd8 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -34,6 +34,8 @@ struct iommu_domain {
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */

+#ifdef CONFIG_IOMMU_API
+
struct iommu_ops {
int (*domain_init)(struct iommu_domain *domain);
void (*domain_destroy)(struct iommu_domain *domain);
@@ -49,8 +51,6 @@ struct iommu_ops {
unsigned long cap);
};

-#ifdef CONFIG_IOMMU_API
-
extern void register_iommu(struct iommu_ops *ops);
extern bool iommu_found(void);
extern struct iommu_domain *iommu_domain_alloc(void);
@@ -70,9 +70,7 @@ extern int iommu_domain_has_cap(struct iommu_domain *domain,

#else /* CONFIG_IOMMU_API */

-static inline void register_iommu(struct iommu_ops *ops)
-{
-}
+struct iommu_ops {};

static inline bool iommu_found(void)
{
--
1.7.4.1