[RFC PATCH] swiotlb: _swiotlb_tbl_map_single() can be static

[kbuild test robot]

Fixes: bd4bb89b2f71 ("swiotlb: suppress warning when __GFP_NOWARN is set v2")
Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
---
 swiotlb.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index ed443d6..e253e80 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -490,11 +490,11 @@ static void swiotlb_bounce(phys_addr_t orig_addr, phys_addr_t tlb_addr,
 	}
 }
 
-phys_addr_t _swiotlb_tbl_map_single(struct device *hwdev,
-				    dma_addr_t tbl_dma_addr,
-				    phys_addr_t orig_addr, size_t size,
-				    enum dma_data_direction dir,
-				    unsigned long attrs, bool warn)
+static phys_addr_t _swiotlb_tbl_map_single(struct device *hwdev,
+					   dma_addr_t tbl_dma_addr,
+					   phys_addr_t orig_addr, size_t size,
+					   enum dma_data_direction dir,
+					   unsigned long attrs, bool warn)
 {
 	unsigned long flags;
 	phys_addr_t tlb_addr;