swiotlb: mark is_swiotlb_buffer static

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 965be92c33b56a7a77e792961a3794cf3293465e..7ef541ce8f344f547c41478cfea9f25a1d7d5ba4 100644 (file)
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -121,7 +121,6 @@ static inline unsigned int swiotlb_max_segment(void) { return 0; }
 #endif
 
 extern void swiotlb_print_info(void);
-extern int is_swiotlb_buffer(phys_addr_t paddr);
 extern void swiotlb_set_max_segment(unsigned int);
 
 extern const struct dma_map_ops swiotlb_dma_ops;

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 9062b14bc7f4cbcaf4e0eab46275f0afde2e45c7..26d3af52956fa21587a11139e34465689f158345 100644 (file)
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -429,7 +429,7 @@ void __init swiotlb_exit(void)
        max_segment = 0;
 }
 
-int is_swiotlb_buffer(phys_addr_t paddr)
+static int is_swiotlb_buffer(phys_addr_t paddr)
 {
        return paddr >= io_tlb_start && paddr < io_tlb_end;
 }