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Date:   Wed, 5 Jun 2019 16:09:41 +0000
From:   Matt Sickler <Matt.Sickler@...tronics.com>
To:     Valerio Genovese <valerio.click@...il.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] staging: kpc2000: kpc_dma: fix symbol
 'kpc_dma_add_device' was not declared.

>This was reported by sparse:
>drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:39:7: warning: symbol
>'kpc_dma_add_device
>' was not declared. Should it be static?
>
>Signed-off-by: Valerio Genovese <valerio.click@...il.com>
>---
> drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 1 +
> 1 file changed, 1 insertion(+)
>
>diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
>b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
>index ee47f43e71cf..19e88c3bc13f 100644
>--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
>+++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
>@@ -56,6 +56,7 @@ struct dev_private_data {
> };
>
> struct kpc_dma_device *kpc_dma_lookup_device(int minor);
>+void kpc_dma_add_device(struct kpc_dma_device *ldev);
>
> extern const struct file_operations  kpc_dma_fops;
>

Wouldn't it be better to mark the function static?
It's only used in kpc_dma_driver.c which is where it's defined.

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