Re: [PATCH] Ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured

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On Mon, 14 Dec 2009, David Howells wrote:
>  config EXT4_USE_FOR_EXT23
>  	bool "Use ext4 for ext2/ext3 file systems"
> -	depends on EXT3_FS=n || EXT2_FS=n
> +	depends on EXT4_FS && (EXT3_FS=n || EXT2_FS=n)

Side note: I think we should actively avoid complex config dependency 
expressions.

The above can be written with simpler expressions by just splitting it in 
two, and I think it makes it more readable:

	depends on EXT4_FS
	depends on EXT3_FS=n || EXT2_FS=n

since the two expressions are logically totally unrelated: one is just the 
obvious "this kconfig doesn't make sense without ext4" thing that was 
missing before, and the other is a totally unrelated "if you already have 
selected ext2 and ext3, then you clearly don't want ext4 to deal with 
them".

			Linus
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