Re: [PATCH] iio: mxs-lradc: Fix 'duplicate const' warning

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On 02/06/2013 02:59 AM, Marek Vasut wrote:
> Dear Fabio Estevam,
> 
>> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
>>
>> The following warning is generated by sparse:
>>
>> drivers/staging/iio/adc/mxs-lradc.c:118:47: warning: duplicate const
>>
>> Remove the duplicate const.
>>
>> Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
>> ---
>>  drivers/staging/iio/adc/mxs-lradc.c |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/iio/adc/mxs-lradc.c
>> b/drivers/staging/iio/adc/mxs-lradc.c index 33a2747..55a459b 100644
>> --- a/drivers/staging/iio/adc/mxs-lradc.c
>> +++ b/drivers/staging/iio/adc/mxs-lradc.c
>> @@ -115,7 +115,7 @@ struct mxs_lradc_of_config {
>>  	const char * const	*irq_name;
>>  };
>>
>> -static const struct mxs_lradc_of_config const mxs_lradc_of_config[] = {
>> +static const struct mxs_lradc_of_config mxs_lradc_of_config[] = {
>>  	[IMX23_LRADC] = {
>>  		.irq_count	= ARRAY_SIZE(mx23_lradc_irq_names),
>>  		.irq_name	= mx23_lradc_irq_names,
> 
> Isn't it const variable/array const array elements ... thus correct with the two 
> consts ?

Sadly not.   c99 c.7.3.8 (first sentence)
or c11 c.7.3.9

If the specification of an array type includes any type qualifiers, the element type is so-
qualified, not the array type.

I think that covers it though I'll admit I'm never that good at following
these specs and got the reference from googling.


Jonathan
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