[PATCH]erase block header(revision 5)

[zhao forrest]

Hi,

Being compared with version 4, the main changes are:
1 remove data_crc field from struct jffs2_raw_ebh
2 change the macro names for EBH in flags
3 rollback to stack allocation of ebh
4 encapsulate the complidated condition judgement into
small functions. has_expected_free_size() and 
need_mark_first_node_obsolete().

The revised patch is at:
http://www.infradead.org/~forrest/eraseblock_header_r5.patch

Thanks,
Forrest