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

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Message-ID: <1421197924.21014.17@mail.thefacebook.com>
Date:	Tue, 13 Jan 2015 20:12:04 -0500
From:	Chris Mason <clm@...com>
To:	<dsterba@...e.cz>
CC:	Arnd Bergmann <arnd@...db.de>, 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 7:16 PM, David Sterba <dsterba@...e.cz> wrote:
> 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

I'll take the original cast one for now and we can do the larger 
cleanup for the next merge window.

-chris

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