mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 14:44:12 +00:00
Code Issues Releases Wiki Activity

tracing: add comments to explain TRACE_EVENT out of protection

Browse source 
The commit:
  commit 5ac35daa93
  Author: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
  tracing/events: fix the include file dependencies

Moved the TRACE_EVENT out of the ifdef protection of tracepoints.h
but uses the define of TRACE_EVENT itself as protection. This patch
adds comments to explain why.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2009-08-26 00:32:37 -04:00 committed by Steven Rostedt
parent 5ac35daa93
commit 7cb2e3ee2a
1 changed files with 11 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
include/linux/tracepoint.h
View file

@ -180,7 +180,15 @@ static inline void tracepoint_synchronize_unregister(void)
}
#define PARAMS(args...) args
#endif
#endif /* _LINUX_TRACEPOINT_H */
/*
* Note: we keep the TRACE_EVENT outside the include file ifdef protection.
* This is due to the way trace events work. If a file includes two
* trace event headers under one "CREATE_TRACE_POINTS" the first include
* will override the TRACE_EVENT and break the second include.
*/
#ifndef TRACE_EVENT
/*
@ -287,4 +295,5 @@ static inline void tracepoint_synchronize_unregister(void)
#define TRACE_EVENT(name, proto, args, struct, assign, print) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
#endif
#endif /* ifdef TRACE_EVENT (see note above) */