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trace_stack.c

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    • Li Zefan's avatar
      a32c7765
      tracing: Fix stack tracer sysctl handling · a32c7765
      Li Zefan authored
      
      This made my machine completely frozen:
      
        # echo 1 > /proc/sys/kernel/stack_tracer_enabled
        # echo 2 > /proc/sys/kernel/stack_tracer_enabled
      
      The cause is register_ftrace_function() was called twice.
      
      Also fix ftrace_enabled sysctl, though seems nothing bad happened
      as I tested it.
      
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4A448D17.9010305@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      a32c7765
      History
      tracing: Fix stack tracer sysctl handling
      Li Zefan authored
      
      This made my machine completely frozen:
      
        # echo 1 > /proc/sys/kernel/stack_tracer_enabled
        # echo 2 > /proc/sys/kernel/stack_tracer_enabled
      
      The cause is register_ftrace_function() was called twice.
      
      Also fix ftrace_enabled sysctl, though seems nothing bad happened
      as I tested it.
      
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4A448D17.9010305@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    gcc-common.h 23.67 KiB