int seq_escape(struct seq_file *, const char *, const char *);
int seq_putc(struct seq_file *m, char c);
int seq_puts(struct seq_file *m, const char *s);
+int seq_write(struct seq_file *seq, const void *data, size_t len);
int seq_printf(struct seq_file *, const char *, ...)
__attribute__ ((format (printf,2,3)));