linux-kernel - Re: [PATCH] Btrfs: avoid build warning on 32-bit

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Message-ID: <20150114001606.GQ3685@twin.jikos.cz>
Date:	Wed, 14 Jan 2015 01:16:06 +0100
From:	David Sterba <dsterba@...e.cz>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Chris Mason <clm@...com>, Miao Xie <miaox@...fujitsu.com>,
	Josef Bacik <jbacik@...com>, David Sterba <dsterba@...e.cz>,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Btrfs: avoid build warning on 32-bit

On Tue, Jan 13, 2015 at 03:09:03PM +0100, Arnd Bergmann wrote:
> A recent change introduced a type cast from a private 64-bit
> value to a pointer, which works fine on 64-bit architectures,
> but not on 32-bit ones, where it produces a harmless compiler
> warning:
> 
> fs/btrfs/extent_io.c: In function 'btrfs_free_io_failure_record':
> fs/btrfs/extent_io.c:2193:13: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
> 
> This adds an intermediate cast to 'unsigned long', which tells
> the compiler to ignore the type mismatch.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: f612496bca664 ("Btrfs: cleanup the read failure record after write
> 			or when the inode is freeing")

Already reported, but not merged

https://patchwork.kernel.org/patch/5541281/
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