[PATCH 5.19 0616/1157] dmaengine: dw: dmamux: Fix build without CONFIG_OF

[Greg Kroah-Hartman]

From: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>

[ Upstream commit 7811f2e7fd6a30d96eaa1fccf57b07694a8cad27 ]

When built without OF support, of_match_node() expands to NULL, which
produces the following output:
>> drivers/dma/dw/rzn1-dmamux.c:105:34: warning: unused variable 'rzn1_dmac_match' [-Wunused-const-variable]
   static const struct of_device_id rzn1_dmac_match[] = {

One way to silence the warning is to enclose the structure definition
with an #ifdef CONFIG_OF/#endif block.

Fixes: 134d9c52fca2 ("dmaengine: dw: dmamux: Introduce RZN1 DMA router support")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220609141455.300879-2-miquel.raynal@xxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/dma/dw/rzn1-dmamux.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/dw/rzn1-dmamux.c b/drivers/dma/dw/rzn1-dmamux.c
index 0ce4fb58185e..f9912c3dd4d7 100644
--- a/drivers/dma/dw/rzn1-dmamux.c
+++ b/drivers/dma/dw/rzn1-dmamux.c
@@ -102,10 +102,12 @@ static void *rzn1_dmamux_route_allocate(struct of_phandle_args *dma_spec,
 	return ERR_PTR(ret);
 }
 
+#ifdef CONFIG_OF
 static const struct of_device_id rzn1_dmac_match[] = {
 	{ .compatible = "renesas,rzn1-dma" },
 	{}
 };
+#endif
 
 static int rzn1_dmamux_probe(struct platform_device *pdev)
 {
-- 
2.35.1