Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts

From	Andy Shevchenko <andy.shevchenko@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts
Date	2016-10-24 09:40 +0200
Message-ID	<svI1r-4up-3@gated-at.bofh.it> (permalink)
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On Mon, Oct 24, 2016 at 5:55 AM, Sinan Kaya <okaya@codeaurora.org> wrote:
> On 10/21/2016 12:11 PM, Andy Shevchenko wrote:
>>> +static void hidma_free_msis(struct hidma_dev *dmadev)
>>> > +{
>>> > +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
>> Perhaps one #ifdef and two definitions of functions?
>
> I don't think it will make a difference. I'll have to move
> #ifdef around the caller of hidma_free_msis instead which
> I think is uglier.
>
> The hidma_write_msi_msg function gets called only when
> CONFIG_GENERIC_MSI_IRQ_DOMAIN is defined. If I don't put
> this around the function definition, I get unused function
> warning from the compiler. This is the reason why preprocessor
> definition is outside of the function definition.

I am talking about something like below:

#ifdef UGLY_DEFINE
myfunc_a()
{
}

myfunc_b()
{
}
#else
static inline myfunc_a() {}
static inline myfunc_b() {}
#endif


There is another way as well, namely use of IS_ENABLED(), IS_BUILTIN()
macros (I don't remember how exactly second one is spelt).

-- 
With Best Regards,
Andy Shevchenko

Thread

[PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-21 18:40 +0200
  Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-10-21 21:20 +0200
    Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-24 05:00 +0200
      Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-10-24 09:40 +0200
        Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for  interrupts okaya@codeaurora.org - 2016-10-24 13:10 +0200

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