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

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Message-ID: <20200110100026.xrt4avwsbbuobe7x@orion>
Date:   Fri, 10 Jan 2020 11:00:26 +0100
From:   Carlos Maiolino <cmaiolino@...hat.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the vfs tree

Meh...

On Fri, Jan 10, 2020 at 05:57:29PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the vfs tree, today's linux-next build (x86_64 allnoconfig)
> failed like this:
> 
> fs/inode.c:1615:5: error: redefinition of 'bmap'
>  1615 | int bmap(struct inode *inode, sector_t *block)
>       |     ^~~~
> In file included from fs/inode.c:7:
> include/linux/fs.h:2867:19: note: previous definition of 'bmap' was here
>  2867 | static inline int bmap(struct inode *inode,  sector_t *block)
>       |                   ^~~~
> 
> Caused by commit
> 
>   65a805fdd75f ("fibmap: Use bmap instead of ->bmap method in ioctl_fibmap")
> 
> I have added this patch for today:

I had a fix to it, in one of my previous patches but I forgot to add it to this
version.

> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Fri, 10 Jan 2020 17:53:19 +1100
> Subject: [PATCH] fs: fix up for !CONFIG_BLOCK and bmap
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  fs/inode.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/inode.c b/fs/inode.c
> index 9f894b25af2b..590f36daa006 100644
> --- a/fs/inode.c
> +++ b/fs/inode.c
> @@ -1598,6 +1598,7 @@ void iput(struct inode *inode)
>  }
>  EXPORT_SYMBOL(iput);
>  
> +#ifdef CONFIG_BLOCK
>  /**
>   *	bmap	- find a block number in a file
>   *	@inode:  inode owning the block number being requested
> @@ -1621,6 +1622,7 @@ int bmap(struct inode *inode, sector_t *block)
>  	return 0;
>  }
>  EXPORT_SYMBOL(bmap);
> +#endif

The problem with this fix, is the fact bmap() could still be called for some
users even withouth CONFIG_BLOCK, so, it needs to have a dummy function to
return -EINVAL in case CONFIG_BLOCK is disabled.

I'll send a patch to fix it. Thanks for spotting it Stephen.

>  
>  /*
>   * With relative atime, only update atime if the previous atime is
> -- 
> 2.24.0
> 
> -- 
> Cheers,
> Stephen Rothwell



-- 
Carlos