/**
* seq_buf_printf - sequence printing of information
* @s: seq_buf descriptor
* @fmt: printf format string
*
* Writes a printf() format into the sequence buffer.
*
* Returns zero on success, -1 on overflow.
*/
int seq_buf_printf(struct seq_buf *s, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = seq_buf_vprintf(s, fmt, ap);
va_end(ap);
return ret;
}
/**
* trace_seq_vprintf - sequence printing of trace information
* @s: trace sequence descriptor
* @fmt: printf format string
*
* The tracer may use either sequence operations or its own
* copy to user routines. To simplify formating of a trace
* trace_seq_printf is used to store strings into a special
* buffer (@s). Then the output may be either used by
* the sequencer or pulled into another buffer.
*/
void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
{
unsigned int save_len = s->seq.len;
if (s->full)
return;
__trace_seq_init(s);
seq_buf_vprintf(&s->seq, fmt, args);
/* If we can't write it all, don't bother writing anything */
if (unlikely(seq_buf_has_overflowed(&s->seq))) {
s->seq.len = save_len;
s->full = 1;
}
}
