[U-Boot] [PATCH V2 06/10] fat: ffconf.h changes for U-Boot port

[Stephen Warren]

On 08/14/2015 12:47 PM, Tom Rini wrote:
> On Tue, Aug 11, 2015 at 08:55:41AM -0600, Stephen Warren wrote:
>> Turn on _FS_NORTC: This means we don't have to implement
>> get_fattime() which simplifies life for now.
>> 
>> Automatically set _FS_READONLY based on CONFIG_FAT_WRITE. This
>> requires including <config.h> since we reference CONFIG_*.
>> 
>> Set _USE_LFN to enable long filename handling; an essential
>> feature.
>> 
>> Set _FS_RPATH so that paths components "." and ".." are correctly
>> parsed and handled. This enables paths such as "/extlinux/../foo"
>> to work.
>> 
>> Set _USE_LABEL so that volume labels can be read.
> 
> Hmm, is there some way to wrap volume label support in Kconfig?
> I'm sure this is useful in some cases, but maybe something that
> boards that are already on the cusp of their size limit would want
> off?

It's certainly possible; ffconf.h's definition of _FS_READONLY is
already driven by CONFIG_FAT_WRITE in this series.

I'm not sure if it's worth it though; on the RPi, turning off volume
label support only saves ~0.5K of .text, 0 .data, and 8 bytes .bss. If
so, I can certainly throw in another patch to allow it to be configured.