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authorSteven Rostedt <srostedt@redhat.com>2009-04-23 23:26:18 -0400
committerSteven Rostedt <rostedt@goodmis.org>2009-04-23 23:34:20 -0400
commitc2518c4366f087ebc10b3919cb2461bbe4f42d0c (patch)
treea62093cb5d040a871a33d235f0993dc4b7fe27b9 /Documentation/SubmittingDrivers
parentd7285c6b5c54397fdf112c2fb98ee43193173aa9 (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>
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