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

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Date:   Wed, 30 Jan 2019 14:45:06 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Al Viro <viro@...IV.linux.org.uk>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David Howells <dhowells@...hat.com>
Subject: Re: linux-next: build failure after merge of the vfs tree

Hi all,

On Wed, 2 Jan 2019 15:01:40 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> After merging the vfs tree, today's linux-next build (x86_64 allnoconfig)
> failed like this:
> 
> fs/fs_context.c: In function 'logfc':
> fs/fs_context.c:400:3: error: implicit declaration of function 'vprintk_emit'; did you mean 'dev_printk_emit'? [-Werror=implicit-function-declaration]
>    vprintk_emit(0, LOGLEVEL_WARNING, NULL, 0, fmt, va);
>    ^~~~~~~~~~~~
>    dev_printk_emit
> 
> Caused by commit
> 
>   e6d72ffc503f ("vfs: Implement logging through fs_context")
> 
> # CONFIG_PRINTK is not set
> 
> I added the following hack for today:
> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Wed, 2 Jan 2019 14:57:36 +1100
> Subject: [PATCH] vfs: work around CONFIG_PRINTK=n in fs_context logging code
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  fs/fs_context.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/fs_context.c b/fs/fs_context.c
> index 8728d49c7871..b0324598f573 100644
> --- a/fs/fs_context.c
> +++ b/fs/fs_context.c
> @@ -391,6 +391,7 @@ EXPORT_SYMBOL(vfs_dup_fs_context);
>   */
>  void logfc(struct fs_context *fc, const char *fmt, ...)
>  {
> +#ifdef CONFIG_PRINTK
>  	va_list va;
>  
>  	va_start(va, fmt);
> @@ -409,6 +410,7 @@ void logfc(struct fs_context *fc, const char *fmt, ...)
>  
>  	pr_cont("\n");
>  	va_end(va);
> +#endif
>  }
>  EXPORT_SYMBOL(logfc);
>  

Ping?
-- 
Cheers,
Stephen Rothwell

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