iommu: Stop exporting free_iova_mem()

It has no user outside iova.c

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1607020492-189471-4-git-send-email-john.garry@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

drivers/iommu/iova.c

@@ -248,12 +248,11 @@ static struct iova *alloc_iova_mem(void)
 	return kmem_cache_zalloc(iova_cache, GFP_ATOMIC | __GFP_NOWARN);
 }
 
-void free_iova_mem(struct iova *iova)
+static void free_iova_mem(struct iova *iova)
 {
 	if (iova->pfn_lo != IOVA_ANCHOR)
 		kmem_cache_free(iova_cache, iova);
 }
-EXPORT_SYMBOL(free_iova_mem);
 
 int iova_cache_get(void)
 {

include/linux/iova.h

@@ -136,7 +136,6 @@ static inline unsigned long iova_pfn(struct iova_domain *iovad, dma_addr_t iova)
 int iova_cache_get(void);
 void iova_cache_put(void);
 
-void free_iova_mem(struct iova *iova);
 void free_iova(struct iova_domain *iovad, unsigned long pfn);
 void __free_iova(struct iova_domain *iovad, struct iova *iova);
 struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size,
@@ -170,10 +169,6 @@ static inline void iova_cache_put(void)
 {
 }
 
-static inline void free_iova_mem(struct iova *iova)
-{
-}
-
 static inline void free_iova(struct iova_domain *iovad, unsigned long pfn)
 {
 }