• Steven Rostedt's avatar
    tracing: create automated trace defines · a8d154b0
    Steven Rostedt authored
    This patch lowers the number of places a developer must modify to add
    new tracepoints. The current method to add a new tracepoint
    into an existing system is to write the trace point macro in the
    trace header with one of the macros TRACE_EVENT, TRACE_FORMAT or
    DECLARE_TRACE, then they must add the same named item into the C file
    with the macro DEFINE_TRACE(name) and then add the trace point.
    This change cuts out the needing to add the DEFINE_TRACE(name).
    Every file that uses the tracepoint must still include the trace/<type>.h
    file, but the one C file must also add a define before the including
    of that file.
     #include <trace/mytrace.h>
    This will cause the trace/mytrace.h file to also produce the C code
    necessary to implement the trace point.
    Note, if more than one trace/<type>.h is used to create the C code
    it is best to list them all together.
     #include <trace/foo.h>
     #include <trace/bar.h>
     #include <trace/fido.h>
    Thanks to Mathieu Desnoyers and Christoph Hellwig for coming up with
    the cleaner solution of the define above the includes over my first
    design to have the C code include a "special" header.
    This patch converts sched, irq and lockdep and skb to use this new
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Neil Horman <nhorman@tuxdriver.com>
    Cc: Zhao Lei <zhaolei@cn.fujitsu.com>
    Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
    Cc: Pekka Enberg <penberg@cs.helsinki.fi>
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>