jffs2_lookup_node_frag
for (frag = jffs2_lookup_node_frag(&f->fragtree, fn->ofs);
frag = jffs2_lookup_node_frag(&f->fragtree, start);
frag = jffs2_lookup_node_frag(&f->fragtree, end-1);
this = jffs2_lookup_node_frag(root, newfrag->node->ofs);
struct jffs2_node_frag *frag = jffs2_lookup_node_frag(list, size);
struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
frag = jffs2_lookup_node_frag(&f->fragtree, offset);
frag = jffs2_lookup_node_frag(&f->fragtree, je32_to_cpu(node->i.offset));