linux-kernel - Re: [PATCH] remoteproc: qcom q6v5: fix modular build

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Date:   Tue, 10 Jul 2018 14:08:16 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>,
        Rohit kumar <rohitkr@...eaurora.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remoteproc: qcom q6v5: fix modular build

On Fri 06 Jul 05:57 PDT 2018, Arnd Bergmann wrote:

> The new driver only works as built-in code at the moment but fails
> with a link error when configured as a loadable module:
> 
> WARNING: modpost: missing MODULE_LICENSE() in drivers/remoteproc/qcom_q6v5.o
> see include/linux/module.h for more information
> ERROR: "qcom_q6v5_init" [drivers/remoteproc/qcom_q6v5_pil.ko] undefined!
> ERROR: "qcom_q6v5_wait_for_start" [drivers/remoteproc/qcom_q6v5_pil.ko] undefined!
> ERROR: "qcom_q6v5_prepare" [drivers/remoteproc/qcom_q6v5_pil.ko] undefined!
> ERROR: "qcom_q6v5_unprepare" [drivers/remoteproc/qcom_q6v5_pil.ko] undefined!
> ERROR: "qcom_q6v5_request_stop" [drivers/remoteproc/qcom_q6v5_pil.ko] undefined!
> ERROR: "qcom_q6v5_init" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
> ERROR: "qcom_q6v5_wait_for_start" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
> ERROR: "qcom_q6v5_prepare" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
> ERROR: "qcom_q6v5_unprepare" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
> ERROR: "qcom_q6v5_request_stop" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
> 
> This exports the internal symbols as needed and adds the MODULE_LICENSE()
> and MODULE_DESCRIPTION() tags. I could not figure out the author, so I
> did not add a MODULE_AUTHOR() tag for now.
> 
> Fixes: 3b415c8fb263 ("remoteproc: q6v5: Extract common resource handling")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Thanks Arnd.

Regards,
Bjorn

> ---
>  drivers/remoteproc/qcom_q6v5.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
> index 400cdf936f6b..61a760ee4aac 100644
> --- a/drivers/remoteproc/qcom_q6v5.c
> +++ b/drivers/remoteproc/qcom_q6v5.c
> @@ -9,6 +9,7 @@
>  #include <linux/kernel.h>
>  #include <linux/platform_device.h>
>  #include <linux/interrupt.h>
> +#include <linux/module.h>
>  #include <linux/soc/qcom/smem.h>
>  #include <linux/soc/qcom/smem_state.h>
>  #include <linux/remoteproc.h>
> @@ -32,6 +33,7 @@ int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);
>  
>  /**
>   * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop
> @@ -45,6 +47,7 @@ int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
>  
>  	return !q6v5->handover_issued;
>  }
> +EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
>  
>  static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
>  {
> @@ -114,6 +117,7 @@ int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
>  
>  	return !ret ? -ETIMEDOUT : 0;
>  }
> +EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);
>  
>  static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
>  {
> @@ -157,6 +161,7 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
>  
>  	return ret == 0 ? -ETIMEDOUT : 0;
>  }
> +EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
>  
>  /**
>   * qcom_q6v5_init() - initializer of the q6v5 common struct
> @@ -241,3 +246,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL_GPL(qcom_q6v5_init);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
> -- 
> 2.9.0
>