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Date:   Fri, 4 Dec 2020 11:27:51 -0700
From:   Mathieu Poirier <mathieu.poirier@linaro.org>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Suzuki K Poulose <suzuki.poulose@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Kim Phillips <kim.phillips@arm.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Tingwei Zhang <tingwei@codeaurora.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
        Mian Yousaf Kaukab <ykaukab@suse.de>,
        Stephen Boyd <swboyd@chromium.org>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com
Subject: Re: [PATCH] coresight: remove broken __exit annotations
Message-ID: <20201204182751.GA1424711@xps15>
References: <20201203231232.1482792-1-arnd@kernel.org>
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On Fri, Dec 04, 2020 at 12:11:40AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> Functions that are annotated __exit are discarded for built-in drivers,
> but the .remove callback in a device driver must still be kept around
> to allow bind/unbind operations.
> 
> There is now a linker warning for the discarded symbol references:
> 
> `tmc_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tmc-core.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tmc-core.o
> `tpiu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tpiu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tpiu.o
> `etb_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-etb10.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-etb10.o
> `static_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
> `dynamic_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
> `static_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
> `dynamic_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
> `catu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-catu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-catu.o
> 
> Remove all those annotations.
> 
> Fixes: 8b0cf82677d1 ("coresight: stm: Allow to build coresight-stm as a module")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

I have applied this patch.

> ---
>  drivers/hwtracing/coresight/coresight-catu.c       | 2 +-
>  drivers/hwtracing/coresight/coresight-cti-core.c   | 2 +-
>  drivers/hwtracing/coresight/coresight-etb10.c      | 2 +-
>  drivers/hwtracing/coresight/coresight-etm3x-core.c | 4 ++--
>  drivers/hwtracing/coresight/coresight-etm4x-core.c | 4 ++--
>  drivers/hwtracing/coresight/coresight-funnel.c     | 6 +++---
>  drivers/hwtracing/coresight/coresight-replicator.c | 6 +++---
>  drivers/hwtracing/coresight/coresight-stm.c        | 2 +-
>  drivers/hwtracing/coresight/coresight-tmc-core.c   | 2 +-
>  drivers/hwtracing/coresight/coresight-tpiu.c       | 2 +-
>  10 files changed, 16 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
> index 99430f6cf5a5..a61313f320bd 100644
> --- a/drivers/hwtracing/coresight/coresight-catu.c
> +++ b/drivers/hwtracing/coresight/coresight-catu.c
> @@ -567,7 +567,7 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
>  	return ret;
>  }
>  
> -static int __exit catu_remove(struct amba_device *adev)
> +static int catu_remove(struct amba_device *adev)
>  {
>  	struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c
> index d28eae93e55c..61dbc1afd8da 100644
> --- a/drivers/hwtracing/coresight/coresight-cti-core.c
> +++ b/drivers/hwtracing/coresight/coresight-cti-core.c
> @@ -836,7 +836,7 @@ static void cti_device_release(struct device *dev)
>  	if (drvdata->csdev_release)
>  		drvdata->csdev_release(dev);
>  }
> -static int __exit cti_remove(struct amba_device *adev)
> +static int cti_remove(struct amba_device *adev)
>  {
>  	struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
> index 1b320ab581ca..0cf6f0b947b6 100644
> --- a/drivers/hwtracing/coresight/coresight-etb10.c
> +++ b/drivers/hwtracing/coresight/coresight-etb10.c
> @@ -803,7 +803,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
>  	return ret;
>  }
>  
> -static int __exit etb_remove(struct amba_device *adev)
> +static int etb_remove(struct amba_device *adev)
>  {
>  	struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
> index 47f610b1c2b1..5bf5a5a4ce6d 100644
> --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
> +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
> @@ -902,14 +902,14 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
>  	return 0;
>  }
>  
> -static void __exit clear_etmdrvdata(void *info)
> +static void clear_etmdrvdata(void *info)
>  {
>  	int cpu = *(int *)info;
>  
>  	etmdrvdata[cpu] = NULL;
>  }
>  
> -static int __exit etm_remove(struct amba_device *adev)
> +static int etm_remove(struct amba_device *adev)
>  {
>  	struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> index d78a37b6592c..3ad5c2a01033 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> @@ -1575,14 +1575,14 @@ static struct amba_cs_uci_id uci_id_etm4[] = {
>  	}
>  };
>  
> -static void __exit clear_etmdrvdata(void *info)
> +static void clear_etmdrvdata(void *info)
>  {
>  	int cpu = *(int *)info;
>  
>  	etmdrvdata[cpu] = NULL;
>  }
>  
> -static int __exit etm4_remove(struct amba_device *adev)
> +static int etm4_remove(struct amba_device *adev)
>  {
>  	struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 39be46b74dfe..071c723227db 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -274,7 +274,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
>  	return ret;
>  }
>  
> -static int __exit funnel_remove(struct device *dev)
> +static int funnel_remove(struct device *dev)
>  {
>  	struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
>  
> @@ -328,7 +328,7 @@ static int static_funnel_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int __exit static_funnel_remove(struct platform_device *pdev)
> +static int static_funnel_remove(struct platform_device *pdev)
>  {
>  	funnel_remove(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
> @@ -370,7 +370,7 @@ static int dynamic_funnel_probe(struct amba_device *adev,
>  	return funnel_probe(&adev->dev, &adev->res);
>  }
>  
> -static int __exit dynamic_funnel_remove(struct amba_device *adev)
> +static int dynamic_funnel_remove(struct amba_device *adev)
>  {
>  	return funnel_remove(&adev->dev);
>  }
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 6772f23e5c4b..7e2a2b7f503f 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -291,7 +291,7 @@ static int replicator_probe(struct device *dev, struct resource *res)
>  	return ret;
>  }
>  
> -static int __exit replicator_remove(struct device *dev)
> +static int replicator_remove(struct device *dev)
>  {
>  	struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
>  
> @@ -318,7 +318,7 @@ static int static_replicator_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int __exit static_replicator_remove(struct platform_device *pdev)
> +static int static_replicator_remove(struct platform_device *pdev)
>  {
>  	replicator_remove(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
> @@ -388,7 +388,7 @@ static int dynamic_replicator_probe(struct amba_device *adev,
>  	return replicator_probe(&adev->dev, &adev->res);
>  }
>  
> -static int __exit dynamic_replicator_remove(struct amba_device *adev)
> +static int dynamic_replicator_remove(struct amba_device *adev)
>  {
>  	return replicator_remove(&adev->dev);
>  }
> diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
> index 32d29704206b..99791773f682 100644
> --- a/drivers/hwtracing/coresight/coresight-stm.c
> +++ b/drivers/hwtracing/coresight/coresight-stm.c
> @@ -951,7 +951,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
>  	return ret;
>  }
>  
> -static int __exit stm_remove(struct amba_device *adev)
> +static int stm_remove(struct amba_device *adev)
>  {
>  	struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
> index 5653e0945c74..8169dff5a9f6 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc-core.c
> +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
> @@ -559,7 +559,7 @@ static void tmc_shutdown(struct amba_device *adev)
>  	spin_unlock_irqrestore(&drvdata->spinlock, flags);
>  }
>  
> -static int __exit tmc_remove(struct amba_device *adev)
> +static int tmc_remove(struct amba_device *adev)
>  {
>  	struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
> index 010762a46087..d5dfee9ee556 100644
> --- a/drivers/hwtracing/coresight/coresight-tpiu.c
> +++ b/drivers/hwtracing/coresight/coresight-tpiu.c
> @@ -173,7 +173,7 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
>  	return PTR_ERR(drvdata->csdev);
>  }
>  
> -static int __exit tpiu_remove(struct amba_device *adev)
> +static int tpiu_remove(struct amba_device *adev)
>  {
>  	struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
>  
> -- 
> 2.27.0
>