tree ca3fc8371382ce8dbe43eb684313847b7555573e
parent a63ce5b306855bccdacba95c03bfc293316c8ae3
author Johannes Berg <johannes@sipsolutions.net> 1259161814 +0100
committer Steven Rostedt <rostedt@goodmis.org> 1260385549 -0500

tracing: Add full state to trace_seq

The trace_seq buffer might fill up, and right now one needs to check the
return value of each printf into the buffer to check for that.

Instead, have the buffer keep track of whether it is full or not, and
reject more input if it is full or would have overflowed with an input
that wasn't added.

Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>