Spotted on Cosmic i386 as well:

 selftests: ftrace: ftracetest
 ========================================
 === Ftrace unit tests ===
 [1] Basic trace file check	[PASS]
 [2] Basic test for tracers	[PASS]
 [3] Basic trace clock test	[PASS]
 [4] Basic event tracing check	[PASS]
 [5] Snapshot and tracing setting	[PASS]
 [6] event tracing - enable/disable with event level files	[PASS]
 [7] event tracing - restricts events based on pid	[PASS]
 [8] event tracing - enable/disable with subsystem level files	[PASS]
 [9] event tracing - enable/disable with top level files	[PASS]
 [10] ftrace - function graph filters with stack tracer	[PASS]
 [11] ftrace - function graph filters	[PASS]
 [12] ftrace - function glob filters	[PASS]
 [13] ftrace - function pid filters	[PASS]
 [14] ftrace - test for function event triggers	[PASS]
 [15] ftrace - function profiler with function tracing	[PASS]
 [16] ftrace - test reading of set_ftrace_filter	[PASS]
 [17] ftrace - test for function traceon/off triggers	[PASS]
 [18] Test creation and deletion of trace instances while setting an event	[PASS]
 [19] Test creation and deletion of trace instances	[PASS]
 [20] Kprobe dynamic event - adding and removing	[PASS]
 [21] Kprobe dynamic event - busy event check	[PASS]
 [22] Kprobe dynamic event with arguments	[PASS]
 [23] Kprobe event string type argument	[FAIL]
 [24] Kprobe event argument syntax	[PASS]
 [25] Kprobes event arguments with types	[PASS]
 [26] Kprobe event auto/manual naming	[PASS]
 [27] Kprobe dynamic event with function tracer	[PASS]
 [28] Kprobe dynamic event - probing module	[PASS]
 [29] Kretprobe dynamic event with arguments	[PASS]
 [30] Kretprobe dynamic event with maxactive	[PASS]
 [31] Register/unregister many kprobe events	[PASS]
 [32] Kprobe events - probe points	[PASS]
 [33] event trigger - test extended error support	[PASS]
 [34] event trigger - test field variable support	[PASS]
 [35] event trigger - test inter-event combined histogram trigger	[PASS]
 [36] event trigger - test multiple actions on hist trigger	[PASS]
 [37] event trigger - test inter-event histogram trigger onmatch action	[PASS]
 [38] event trigger - test inter-event histogram trigger onmatch-onmax action [PASS]
 [39] event trigger - test inter-event histogram trigger onmax action	[PASS]
 [40] event trigger - test synthetic event create remove	[PASS]
 [41] event trigger - test synthetic_events syntax parser	[PASS]
 [42] event trigger - test event enable/disable trigger	[PASS]
 [43] event trigger - test trigger filter	[PASS]
 [44] event trigger - test histogram modifiers	[PASS]
 [45] event trigger - test histogram trigger	[PASS]
 [46] event trigger - test multiple histogram triggers	[PASS]
 [47] event trigger - test snapshot-trigger	[PASS]
 [48] event trigger - test stacktrace-trigger	[PASS]
 [49] trace_marker trigger - test histogram trigger	[PASS]
 [50] trace_marker trigger - test snapshot trigger	[PASS]
 [51] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
 [52] trace_marker trigger - test histogram with synthetic event	[PASS]
 [53] event trigger - test traceon/off trigger	[PASS]
 [54] (instance) Basic test for tracers	[PASS]
 [55] (instance) Basic trace clock test	[PASS]
 [56] (instance) Snapshot and tracing setting	[PASS]
 [57] (instance) event tracing - enable/disable with event level files	[PASS]
 [58] (instance) event tracing - restricts events based on pid	[PASS]
 [59] (instance) event tracing - enable/disable with subsystem level files	[PASS]
 [60] (instance) ftrace - test for function event triggers	[PASS]
 [61] (instance) ftrace - test for function traceon/off triggers	[PASS]
 [62] (instance) event trigger - test event enable/disable trigger	[PASS]
 [63] (instance) event trigger - test trigger filter	[PASS]
 [64] (instance) event trigger - test histogram modifiers	[PASS]
 [65] (instance) event trigger - test histogram trigger	[PASS]
 [66] (instance) event trigger - test multiple histogram triggers	[PASS]
 [67] (instance) trace_marker trigger - test histogram trigger	[PASS]
 [68] (instance) trace_marker trigger - test snapshot trigger	[PASS]

 # of passed: 67
 # of failed: 1
 # of unresolved: 0
 # of untested: 0
 # of unsupported: 0
 # of xfailed: 0
 # of undefined(test bug): 0
 not ok 1..1 selftests: ftrace: ftracetest [FAIL]