Re: linux-next: build failure after merge of the mm tree

From: Changbin Du <changbin.du@huawei.com>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Changbin Du <changbin.du@huawei.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the mm tree
Date: Thu, 21 Dec 2023 15:45:43 +0800	[thread overview]
Message-ID: <20231221074543.ahl6zmvmkgw7i52k@M910t> (raw)
In-Reply-To: <20231221183803.1dd342aa@canb.auug.org.au>

Hi, Rothwell,
Please hold this patch. It need more discussion and probably the flush can be
simply removed.

On Thu, Dec 21, 2023 at 06:38:03PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the mm tree, today's linux-next build (x86_64 allnoconfig)
> failed like this:
> 
> x86_64-linux-gnu-ld: init/main.o: in function `kernel_init':
> main.c:(.ref.text+0xbf): undefined reference to `flush_module_init_free_work'
> 
> Caused by commit
> 
>   1d8053432676 ("modules: wait do_free_init correctly")
> 
> This build has
> # CONFIG_MODULES is not set
> 
> I have applied this (hack) patch for today.
> 
> From: Stephen Rothwell <sfr@canb.auug.org.au>
> Date: Thu, 21 Dec 2023 18:27:07 +1100
> Subject: [PATCH] fix up for "modules: wait do_free_init correctly"
> 
> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> ---
>  init/main.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/init/main.c b/init/main.c
> index f0b7e21ac67f..1df1106ff09b 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -1407,7 +1407,9 @@ static void mark_readonly(void)
>  		 * flushed so that we don't hit false positives looking for
>  		 * insecure pages which are W+X.
>  		 */
> +#ifdef CONFIG_MODULES
>  		flush_module_init_free_work();
> +#endif
>  		mark_rodata_ro();
>  		rodata_test();
>  	} else
> -- 
> 2.43.0
> 
> -- 
> Cheers,
> Stephen Rothwell

-- 
Cheers,
Changbin Du