jffs2_flash_direct_writev
ret = jffs2_flash_direct_writev(c, vecs, 1, jeb->offset, &retlen);
int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);