Jffs2 needs erase size

[daniel at debian.org (Daniel Baumann)]

Marco Amadori wrote:
> Flashes devices often needs a different erase size than default, a config 
> option for that should be added like [ -e,--eraseblock=SIZE ] from 
> mkfs.jffs2,

added --jffs2-eraseblock in git, thanks.

> for correct results also endianess should be take care of (e.g. 
> power pc have different endianess, so have mips)

mkfs.jffs2 uses the same endianness as the host system. crossbuilding is
not possible anyway, and those architectures which support bi-arch, do
not have a different endianness in the other arch (except s390 and
s390x, there i'm not sure, but that's not actually a problem, as s390
will possibly never have a live system (no aufs/unionfs available on
that arch, for starters)).

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