http://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html will help u and you need search google for some coding tricks or tips. 2009/4/30 Onkar <onkar.n.m@xxxxxxxxx>: > Hi All , > Why is 0 length arrays > > for instance > > struct ext2_xattr_entry { > __u8 e_name_len; /* length of name */ > __u8 e_name_index; /* attribute name index */ > __le16 e_value_offs; /* offset in disk block of value */ > __le32 e_value_block; /* disk block attribute is stored on (n/i) > */ > __le32 e_value_size; /* size of attribute value */ > __le32 e_hash; /* hash value of name and value */ > char e_name[0]; /* attribute name */ > <<<-------------------------------------------- Why ?? > }; > > AND > > struct mb_cache_entry { > struct list_head e_lru_list; > struct mb_cache *e_cache; > unsigned short e_used; > unsigned short e_queued; > struct block_device *e_bdev; > sector_t e_block; > struct list_head e_block_list; > struct { > struct list_head o_list; > unsigned int o_key; > } e_indexes[0]; <<<-------------------------------------------- Why ?? > }; > > used in many structures in the kernel code ? What is their significance ? > and Why is > > do { > // exp 1 > //exp 2 > //exp 3 > }while (0) ; > > used ? > > Regards, > Onkar > > > > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
