linux-kernel - Re: linux-next: build warning after merge of the spi tree

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Date:   Wed, 15 Jan 2020 10:10:09 +0100
From:   Jean Pihet <jean.pihet@...oldbits.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Mark Brown <broonie@...nel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the spi tree

Hi Stephen,

I did not have this warning, it may be a combination of compiler
version and build flags. Do you need a fixup patch for it?

Thanks,
Jean

On Wed, Jan 15, 2020 at 3:23 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> After merging the spi tree, today's linux-next build (x86_64 allmodconfig)
> produced this warning:
>
> drivers/spi/spi-ti-qspi.c: In function 'ti_qspi_start_transfer_one':
> drivers/spi/spi-ti-qspi.c:392:8: warning: 'rx_wlen' may be used uninitialized in this function [-Wmaybe-uninitialized]
>   392 |     if (rx_wlen >= 32)
>       |        ^
> drivers/spi/spi-ti-qspi.c:318:12: note: 'rx_wlen' was declared here
>   318 |  u8 rxlen, rx_wlen;
>       |            ^~~~~~~
>
> Introduced by commit
>
>   e7cc5cfbea4c ("spi: spi-ti-qspi: optimize byte-transfers")
>
> Looks like it may be a false positive.
>
> --
> Cheers,
> Stephen Rothwell