linux-kernel - Re: [RFC 4/7] soc: qcom: Add Shared Memory Manager driver

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Date:	Tue, 30 Sep 2014 11:58:16 +0530
From:	Kiran Padwal <kiran.padwal@...rtplayin.com>
To:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
CC:	Kumar Gala <galak@...eaurora.org>,
	Andy Gross <agross@...eaurora.org>,
	Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...aro.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Suman Anna <s-anna@...com>
Subject: Re: [RFC 4/7] soc: qcom: Add Shared Memory Manager driver


Hi,

On Tuesday 30 September 2014 11:47 AM, Kiran Padwal wrote:
> Hi Bjorn,
> 
> On Tuesday 30 September 2014 06:04 AM, Bjorn Andersson wrote:
>> The Shared Memory Manager driver implements an interface for allocating
>> and accessing items in the memory area shared among all of the
>> processors in a Qualcomm platform.
>>
>> Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
>> ---
> 
> <snip>
> 
>> +
>> +static int qcom_smem_probe(struct platform_device *pdev)
>> +{
>> +	struct qcom_smem *smem;
>> +	struct resource *res;
>> +	size_t array_size;
>> +	int num_regions = 0;
>> +	int i;
>> +
>> +	for (i = 0; i < pdev->num_resources; i++) {
>> +		res = &pdev->resource[i];
>> +
>> +		if (resource_type(res) == IORESOURCE_MEM)
>> +			num_regions++;
>> +	}
>> +
>> +	if (num_regions == 0) {
>> +		dev_err(&pdev->dev, "no smem regions specified\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	array_size = num_regions * sizeof(struct smem_region);
>> +	smem = devm_kzalloc(&pdev->dev, sizeof(*smem) + array_size, GFP_KERNEL);
>> +	if (!smem)
>> +		return -ENOMEM;
>> +
>> +	smem->dev = &pdev->dev;
>> +	smem->hwlock = of_hwspin_lock_request(pdev->dev.of_node, NULL);
> 
> Compilation breaks while I try to compile with this patch.
> Do I missing anything? Below is the error I am getting,
> 
> drivers/soc/qcom/qcom_smem.c: In function ‘qcom_smem_probe’:
> drivers/soc/qcom/qcom_smem.c:274:2: error: implicit declaration of function ‘of_hwspin_lock_request’ [-Werror=implicit-function-declaration]
>   smem->hwlock = of_hwspin_lock_request(pdev->dev.of_node, NULL)

I am sorry I missed the note in commit message of this patch. I did look for any such note in cover letter 
and also googled around for any change to find this function.
Could not find and hence posted comment. Please ignore.

> 
> Thanks,
> --Kiran
> 
> 
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