linux-kernel - [PATCH] ASoC: fsl_asrc: Fix -Wmissing-prototypes warning

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Date:   Mon, 25 May 2020 17:03:32 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, broonie@...nel.org,
        alsa-devel@...a-project.org, lgirdwood@...il.com, perex@...ex.cz,
        tiwai@...e.com
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: fsl_asrc: Fix -Wmissing-prototypes warning

From: shengjiu wang <shengjiu.wang@....com>

COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

sound/soc/fsl/fsl_asrc.c:557:18: warning: no previous prototype for function 'fsl_asrc_get_dma_channel' [-Wmissing-prototypes]
struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir)
                 ^
sound/soc/fsl/fsl_asrc.c:557:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir)
^
static

Fixes: be7bd03f0201 ("ASoC: fsl_asrc: Move common definition to fsl_asrc_common")
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: shengjiu wang <shengjiu.wang@....com>
---
 sound/soc/fsl/fsl_asrc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 7e2d598ffb81..d79d2c7f8d36 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -554,7 +554,8 @@ static void fsl_asrc_stop_pair(struct fsl_asrc_pair *pair)
 /**
  * Get DMA channel according to the pair and direction.
  */
-struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir)
+static struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair,
+						 bool dir)
 {
 	struct fsl_asrc *asrc = pair->asrc;
 	enum asrc_pair_index index = pair->index;
@@ -564,7 +565,6 @@ struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir)
 
 	return dma_request_slave_channel(&asrc->pdev->dev, name);
 }
-EXPORT_SYMBOL_GPL(fsl_asrc_get_dma_channel);
 
 static int fsl_asrc_dai_startup(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
-- 
2.21.0