Re: [PATCH v3] Compiler Attributes: remove CONFIG_ENABLE_MUST_CHECK

[Miguel Ojeda]

On Sat, Dec 12, 2020 at 5:18 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>
> This patch results in:
>
> arch/sh/kernel/cpu/sh4a/smp-shx3.c: In function 'shx3_prepare_cpus':
> arch/sh/kernel/cpu/sh4a/smp-shx3.c:76:3: error: ignoring return value of 'request_irq' declared with attribute 'warn_unused_result'
>
> when building sh:defconfig. Checking for calls to request_irq()
> suggests that there will be other similar errors in various builds.
> Reverting the patch fixes the problem.

Which ones? From a quick grep and some filtering I could only find one
file with wrong usage apart from this one:

    drivers/net/ethernet/lantiq_etop.c:
request_irq(irq, ltq_etop_dma_irq, 0, "etop_tx", priv);
    drivers/net/ethernet/lantiq_etop.c:
request_irq(irq, ltq_etop_dma_irq, 0, "etop_rx", priv);

Of course, this does not cover other functions, but it means there
aren't many issues and/or people building the code if nobody complains
within a few weeks. So I think we can fix them as they come.

Cheers,
Miguel