• Li Zefan's avatar
    tracing/events: make struct trace_entry->type to be int type · 7a4f453b
    Li Zefan authored
    
    
    struct trace_entry->type is unsigned char, while trace event's id is
    int type, thus for a event with id >= 256, it's entry->type is cast
    to (id % 256), and then we can't see the trace output of this event.
    
     # insmod trace-events-sample.ko
     # echo foo_bar > /mnt/tracing/set_event
     # cat /debug/tracing/events/trace-events-sample/foo_bar/id
     256
     # cat /mnt/tracing/trace_pipe
               <...>-3548  [001]   215.091142: Unknown type 0
               <...>-3548  [001]   216.089207: Unknown type 0
               <...>-3548  [001]   217.087271: Unknown type 0
               <...>-3548  [001]   218.085332: Unknown type 0
    
    [ Impact: fix output for trace events with id >= 256 ]
    Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
    Acked-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Tom Zanussi <tzanussi@gmail.com>
    LKML-Reference: <49EEDB0E.5070207@cn.fujitsu.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    7a4f453b
ftrace_event.h 3.99 KB