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

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Date:   Tue, 21 Nov 2023 22:04:17 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the kspp-gustavo tree



On 11/21/23 21:48, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the kspp-gustavo tree, today's linux-next build (sparc64
> defconfig) produced these warnings:
>

[..]

> mm/mempolicy.c:2890:26: note: destination object 'str' of size [0, 9223372036854775807]
> mm/mempolicy.c:2890:26: note: destination object 'str' of size [0, 9223372036854775807]
> mm/mempolicy.c:3007:26: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
>   3007 |                 *--flags = '=';
>        |                 ~~~~~~~~~^~~~~
> mm/mempolicy.c:2890:26: note: destination object 'str' of size [0, 9223372036854775807]
>   2890 | int mpol_parse_str(char *str, struct mempolicy **mpol)
>        |                    ~~~~~~^~~
> 
> This is using gcc v11.1.0
> 

This doesn't show up with more recent compilers because it was an issue in GCC.

--
Gustavo