[PATCH -next] swiotlb: drop pointless static qualifier in swiotlb_dma_supported()

[YueHaibing]

There is no need to have the 'struct dentry *d_swiotlb_usage' variable
static since new value always be assigned before use it.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 kernel/dma/swiotlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a7b53786db9f..02fa517c47d9 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -689,7 +689,7 @@ swiotlb_dma_supported(struct device *hwdev, u64 mask)
 
 static int __init swiotlb_create_debugfs(void)
 {
-	static struct dentry *d_swiotlb_usage;
+	struct dentry *d_swiotlb_usage;
 	struct dentry *ent;
 
 	d_swiotlb_usage = debugfs_create_dir("swiotlb", NULL);