linux-kernel - Re: linux-next: build warnings after merge of the kbuild tree

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Message-ID: <CAK7LNAQjVCPwfJ-opUkW3+XTM0uk9PSo3XiyGwCAMKkK05WnxA@mail.gmail.com>
Date:   Thu, 31 May 2018 10:12:08 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: linux-next: build warnings after merge of the kbuild tree

Hi.
(+CC Kees)

2018-05-31 7:40 GMT+09:00 Stephen Rothwell <sfr@...b.auug.org.au>:
> Hi Masahiro,
>
> After merging the kbuild tree, today's linux-next build (x86_64
> allmodconfig) produced these warnings:
>
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function 'wlc_phy_workarounds_nphy_rev7':
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: warning: the frame size of 3136 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  }
>  ^
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function 'wlc_phy_workarounds_nphy_rev3':
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: warning: the frame size of 2872 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  }
>  ^
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function 'wlc_phy_cal_txiqlo_nphy':
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26033:1: warning: the frame size of 2432 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  }
>  ^
>
> I have no idea what caused these warnings to appear ... nothing in those
> functions looks too bad.


This has been triggered by the following commit:


commit 0e461945f3504e09b8ecf947b6398adce1287a28
Author: Masahiro Yamada <yamada.masahiro@...ionext.com>
Date:   Mon May 28 18:22:07 2018 +0900

    gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST



CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL was previously disabled
for COMPILE_TEST, which is now enabled.



COMPILE_TEST now enables GCC plugin for wider test coverage,
this is a good thing in general.





-- 
Best Regards
Masahiro Yamada