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author | Steven Rostedt <srostedt@redhat.com> | 2009-04-23 23:26:18 -0400 |
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committer | Steven Rostedt <rostedt@goodmis.org> | 2009-04-23 23:34:20 -0400 |
commit | c2518c4366f087ebc10b3919cb2461bbe4f42d0c (patch) | |
tree | a62093cb5d040a871a33d235f0993dc4b7fe27b9 /Documentation/video4linux | |
parent | d7285c6b5c54397fdf112c2fb98ee43193173aa9 (diff) |
tracing: fix cut and paste macro error
In case a module uses the TRACE_EVENT macro for creating automated
events in ftrace, it may choose to use a different file name
than the defined system name, or choose to use a different path than
the default "include/trace/events" include path.
If this is done, then before including trace/define_trace.h the
header would define either "TRACE_INCLUDE_FILE" for the file
name or "TRACE_INCLUDE_PATH" for the include path.
If it does not define these, then the define_trace.h defines them
instead. If define trace defines them, then define_trace.h should
also undefine them before exiting. To do this a macro is used
to note this:
#ifndef TRACE_INCLUDE_FILE
# define TRACE_INCLUDE_FILE TRACE_SYSTEM
# define UNDEF_TRACE_INCLUDE_FILE
#endif
[...]
#ifdef UNDEF_TRACE_INCLUDE_FILE
# undef TRACE_INCLUDE_FILE
# undef UNDEF_TRACE_INCLUDE_FILE
#endif
The UNDEF_TRACE_INCLUDE_FILE acts as a CPP variable to know to undef
the TRACE_INCLUDE_FILE before leaving define_trace.h.
Unfortunately, due to cut and paste errors, the macros between
FILE and PATH got mixed up.
[ Impact: undef TRACE_INCLUDE_FILE and/or TRACE_INCLUDE_PATH when needed ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/video4linux')
0 files changed, 0 insertions, 0 deletions