Re: [PATCH 09/10] treewide: Remove uninitialized_var() usage

[Kalle Valo]

Kees Cook <keescook@xxxxxxxxxxxx> writes:

> 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.
>
> I preparation for removing[2] the[3] macro[4], remove all remaining
> needless uses with the following script:
>
> git grep '\buninitialized_var\b' | cut -d: -f1 | sort -u | \
> 	xargs perl -pi -e \
> 		's/\buninitialized_var\(([^\)]+)\)/\1/g;
> 		 s:\s*/\* (GCC be quiet|to make compiler happy) \*/$::g;'
>
> drivers/video/fbdev/riva/riva_hw.c was manually tweaked to avoid
> pathological white-space.
>
> No outstanding warnings were found building allmodconfig with GCC 9.3.0
> for x86_64, i386, arm64, arm, powerpc, powerpc64le, s390x, mips, sparc64,
> alpha, and m68k.
>
> [1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@xxxxxxxxxx/
> [2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@xxxxxxxxxxxxxx/
> [3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@xxxxxxxxxxxxxx/
> [4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@xxxxxxxxxxxxxx/
>
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>

[...]

>  drivers/net/wireless/ath/ath10k/core.c           |  2 +-
>  drivers/net/wireless/ath/ath6kl/init.c           |  2 +-
>  drivers/net/wireless/ath/ath9k/init.c            |  2 +-
>  drivers/net/wireless/broadcom/b43/debugfs.c      |  2 +-
>  drivers/net/wireless/broadcom/b43/dma.c          |  2 +-
>  drivers/net/wireless/broadcom/b43/lo.c           |  2 +-
>  drivers/net/wireless/broadcom/b43/phy_n.c        |  2 +-
>  drivers/net/wireless/broadcom/b43/xmit.c         | 12 ++++++------
>  .../net/wireless/broadcom/b43legacy/debugfs.c    |  2 +-
>  drivers/net/wireless/broadcom/b43legacy/main.c   |  2 +-
>  drivers/net/wireless/intel/iwlegacy/3945.c       |  2 +-
>  drivers/net/wireless/intel/iwlegacy/4965-mac.c   |  2 +-
>  .../net/wireless/realtek/rtlwifi/rtl8192cu/hw.c  |  4 ++--

For wireless drivers:

Acked-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches