• Steven Rostedt's avatar
    tracing: Add DEFINE_EVENT_FN() macro · f5abaa1b
    Steven Rostedt authored
    
    
    Each TRACE_EVENT() adds several helper functions. If two or more trace events
    share the same structure and print format, they can also share most of these
    helper functions and save a lot of space from duplicate code. This is why the
    DECLARE_EVENT_CLASS() and DEFINE_EVENT() were created.
    
    Some events require a trigger to be called at registering and unregistering of
    the event and to do so they use TRACE_EVENT_FN().
    
    If multiple events require a trigger, they currently have no choice but to use
    TRACE_EVENT_FN() as there's no DEFINE_EVENT_FN() available. This unfortunately
    causes a lot of wasted duplicate code created.
    
    By adding a DEFINE_EVENT_FN(), these events can still use a
    DECLARE_EVENT_CLASS() and then define their own triggers.
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    Link: http://lkml.kernel.org/r/51C3236C.8030508@hds.com
    
    Signed-off-by: default avatarSeiji Aguchi <seiji.aguchi@hds.com>
    Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
    f5abaa1b
define_trace.h 3.12 KB