linux-kernel - Re: Subject: [PATCH 12/16] Squashfs: header files

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Date:	Thu, 23 Oct 2008 09:56:21 +0100
From:	Phillip Lougher <phillip@...gher.demon.co.uk>
To:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
CC:	akpm@...ux-foundation.org, linux-embedded@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	tim.bird@...sony.com
Subject: Re: Subject: [PATCH 12/16] Squashfs: header files

Geert Uytterhoeven wrote:
> On Fri, 17 Oct 2008, Phillip Lougher wrote:

>> +#ifdef SQUASHFS_TRACE
>> +#define TRACE(s, args...)	printk(KERN_NOTICE "SQUASHFS: "s, ## args)
>> +#else
>> +#define TRACE(s, args...)	{}
>> +#endif
> 
> Just use
> 
>     #define TRACE(s, args...)	pr_debug("SQUASHFS: "s, ## args)

OK.

>> +
>> +#define WARNING(s, args...)	printk(KERN_WARNING "SQUASHFS: "s, ## args)
>                                 ^^^^^^^^^^^^^^^^
> 				pr_warning(
> 

OK.

> 
> SQUASHFS_MKFLAGS() isn't used by the kernel, only by the tools (mksquashfs)?
> 

Only used by mksquashfs.  I pulled out the user-space only stuff into a 
separate include, but must have missed this one.

>> +/* meta index cache */
>> +#define SQUASHFS_META_INDEXES	(SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
>                                                                          ^^^^^^^^^^^^
> I was wondering whether a meta index is an `unsigned int' or an `__le32', but I
> couldn't find it easily.
> 

Unsigned int, it's used internally by the index cache code (file.c).  It 
works out how many block indexes can fit into one compressed metadata block.

Phillip
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