[Bug 103271] AMD R9 270X Flickering with DPM Enabled on Linux 4.1 with RadeonSI

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=103271

--- Comment #12 from Kevin McCormack <wittyman37 at yahoo.com> ---
This might help as well...

$ git bisect view --stat
commit 7e255d346c12888f7cce4b89a03a5fe5e9196ab1
Author: Jerry Snitselaar <jsnitsel at redhat.com>
Date:   Thu Apr 30 08:10:24 2015 -0700

    tracing: Export tracing clock functions

    Critical tracepoint hooks should never call anything that takes a lock,
    so they are unable to call getrawmonotonic() or ktime_get().

    Export the rest of the tracing clock functions so can be used in
    tracepoint hooks.

    Background: We have a customer that adds their own module and registers
    a tracepoint hook to sched_wakeup. They were using ktime_get() for a
    time source, but it grabs a seq lock and caused a deadlock to occur.

    Link:
http://lkml.kernel.org/r/1430406624-22609-1-git-send-email-jsnitsel@redhat.com

    Signed-off-by: Jerry Snitselaar <jsnitsel at redhat.com>
    Signed-off-by: Steven Rostedt <rostedt at goodmis.org>

:...skipping...
commit 7e255d346c12888f7cce4b89a03a5fe5e9196ab1
Author: Jerry Snitselaar <jsnitsel at redhat.com>
Date:   Thu Apr 30 08:10:24 2015 -0700

    tracing: Export tracing clock functions

    Critical tracepoint hooks should never call anything that takes a lock,
    so they are unable to call getrawmonotonic() or ktime_get().

    Export the rest of the tracing clock functions so can be used in
    tracepoint hooks.

    Background: We have a customer that adds their own module and registers
    a tracepoint hook to sched_wakeup. They were using ktime_get() for a
    time source, but it grabs a seq lock and caused a deadlock to occur.

    Link:
http://lkml.kernel.org/r/1430406624-22609-1-git-send-email-jsnitsel@redhat.com

    Signed-off-by: Jerry Snitselaar <jsnitsel at redhat.com>
    Signed-off-by: Steven Rostedt <rostedt at goodmis.org>

 kernel/trace/trace_clock.c | 3 +++
 1 file changed, 3 insertions(+)

commit 755a27e7e4c817dd51ade41668b380f26026899c
Author: Nicolas Iooss <nicolas.iooss_linux at m4x.org>
Date:   Sun May 3 18:18:02 2015 +0800

    tracing: remove unused ftrace_output_event() prototype

    The prototype of ftrace_output_event was added by commit 1d6bae966e90
    ("tracing: Move raw output code from macro to standalone function")
    but this function was not defined anywhere, and is still nowhere to be
    found.

    Link:
http://lkml.kernel.org/r/1430648282-25792-1-git-send-email-nicolas.iooss_linux@m4x.org

    Signed-off-by: Nicolas Iooss <nicolas.iooss_linux at m4x.org>
    Signed-off-by: Steven Rostedt <rostedt at goodmis.org>

 include/linux/ftrace_event.h | 3 ---
 1 file changed, 3 deletions(-)

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