Bug 599175 - conflicting tracepoint power.h headers
conflicting tracepoint power.h headers
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
low Severity medium
: rc
: ---
Assigned To: Mark Wielaard
Han Pingtian
: 610503 (view as bug list)
Depends On:
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Reported: 2010-06-02 15:30 EDT by Josh Stone
Modified: 2010-11-11 11:14 EST (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2010-11-11 11:14:00 EST
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Description Josh Stone 2010-06-02 15:30:11 EDT
Kernel v2.6.32 shipped with both "include/trace/power.h" and "include/trace/events/power.h".  The former is superseded by the latter, introduced in commit 6161352.  Commit 192dcf1 cleans this up, but unfortunately not until 2.6.33.

This is tripping up SystemTap, which uses automatic scans to find tracepoints under include/trace/.  We end up trying to use both power.h's, which mask each other by the duplicate _TRACE_POWER_H.

$ stap -e 'probe kernel.trace("power*") { next }' -p4
/tmp/stapP05llp/stap_5c867073e806d7cfabb464b245ec1569_834.c: In function ‘register_tracepoint_probe_3’:
/tmp/stapP05llp/stap_5c867073e806d7cfabb464b245ec1569_834.c:695: error: implicit declaration of function ‘register_trace_power_frequency’
/tmp/stapP05llp/stap_5c867073e806d7cfabb464b245ec1569_834.c: In function ‘unregister_tracepoint_probe_3’:
/tmp/stapP05llp/stap_5c867073e806d7cfabb464b245ec1569_834.c:698: error: implicit declaration of function ‘unregister_trace_power_frequency’
make[1]: *** [/tmp/stapP05llp/stap_5c867073e806d7cfabb464b245ec1569_834.o] Error 1
make: *** [_module_/tmp/stapP05llp] Error 2
Pass 4: compilation failed.  Try again with another '--vp 0001' option.

Please pull commit 192dcf1 to RHEL6 too.
Comment 2 RHEL Product and Program Management 2010-06-07 12:05:07 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
Comment 3 Frank Ch. Eigler 2010-06-21 12:36:37 EDT
posted to rhkernel-list by mjw
Comment 5 Aristeu Rozanski 2010-07-01 12:25:16 EDT
Patch(es) available on kernel-2.6.32-42.el6
Comment 7 Mark Wielaard 2010-07-02 05:45:31 EDT
*** Bug 610503 has been marked as a duplicate of this bug. ***
Comment 9 Han Pingtian 2010-08-13 17:48:03 EDT
Verified with 2.6.32-54.el6.
Comment 10 releng-rhel@redhat.com 2010-11-11 11:14:00 EST
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.

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