On Wed, Jun 3, 2020 at 4:32 PM Kees Cook <keesc...@chromium.org> wrote:
>
> Using uninitialized_var() is dangerous as it papers over real bugs[1]
> (or can in the future), and suppresses unrelated compiler warnings (e.g.
> "unused variable"). If the compiler thinks it is uninitialized, either
> simply initialize the variable or make compiler changes. As a precursor
> to removing[2] this[3] macro[4], just remove this variable since it was
> actually unused:
>
> drivers/spi/spi-davinci.c: In function ‘davinci_spi_bufs’:
> drivers/spi/spi-davinci.c:579:11: warning: unused variable ‘rx_buf_count’
> [-Wunused-variable]
> 579 | unsigned rx_buf_count;
> | ^~~~~~~~~~~~
>
> [1] https://lore.kernel.org/lkml/20200603174714.192027-1-gli...@google.com/
> [2]
> https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1tgqcr5vqkczwj0qxk6cernou6eedsuda...@mail.gmail.com/
> [3]
> https://lore.kernel.org/lkml/ca+55afwgbgqhbp1fkxvrkepzyr5j8n1vkt1vzdz9knmpuxh...@mail.gmail.com/
> [4]
> https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yvju65tplgn_ybynv0ve...@mail.gmail.com/
>
> Signed-off-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulni...@google.com>
Fixes 048177ce3b39 ("spi: spi-davinci: convert to DMA engine API")
> ---
> drivers/spi/spi-davinci.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
> index f71c497393a6..f50c0c79cbdf 100644
> --- a/drivers/spi/spi-davinci.c
> +++ b/drivers/spi/spi-davinci.c
> @@ -576,7 +576,6 @@ static int davinci_spi_bufs(struct spi_device *spi,
> struct spi_transfer *t)
> u32 errors = 0;
> struct davinci_spi_config *spicfg;
> struct davinci_spi_platform_data *pdata;
> - unsigned uninitialized_var(rx_buf_count);
>
> dspi = spi_master_get_devdata(spi->master);
> pdata = &dspi->pdata;
> --
> 2.25.1
>
> --
> You received this message because you are subscribed to the Google Groups
> "Clang Built Linux" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clang-built-linux+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/clang-built-linux/20200603233203.1695403-8-keescook%40chromium.org.
--
Thanks,
~Nick Desaulniers
_______________________________________________
b43-dev mailing list
b43-dev@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/b43-dev
