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Date: Mon, 29 Dec 2014 16:09:03 +0100
From: David Sterba <dsterba@suse.cz>
To: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>,
        Chris Murphy <chris@colorremedies.com>
Subject: Re: [PATCH] btrfs: suppress a build warning on building 32bit kernel
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On Thu, Dec 25, 2014 at 06:21:41PM +0900, Satoru Takeuchi wrote:
> From: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -2190,7 +2190,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
>   
>   		next = next_state(state);
>   
> -		failrec = (struct io_failure_record *)state->private;
> +		failrec = (struct io_failure_record *)(unsigned long)state->private;

We're always using the 'private' data to store a pointer to
'struct io_failure_record *', please change the defintion in
'struct extent_state' instead of the typecasting.

>   		free_extent_state(state);
>   		kfree(failrec);