Anton Blanchard 151772dbfa tracing/trace_stack: Fix stack trace on ppc64 ... save_stack_trace() stores the instruction pointer, not the function descriptor. On ppc64 the trace stack code currently dereferences the instruction pointer and shows 8 bytes of instructions in our backtraces: # cat /sys/kernel/debug/tracing/stack_trace Depth Size Location (26 entries) ----- ---- -------- 0) 5424 112 0x6000000048000004 1) 5312 160 0x60000000ebad01b0 2) 5152 160 0x2c23000041c20030 3) 4992 240 0x600000007c781b79 4) 4752 160 0xe84100284800000c 5) 4592 192 0x600000002fa30000 6) 4400 256 0x7f1800347b7407e0 7) 4144 208 0xe89f0108f87f0070 8) 3936 272 0xe84100282fa30000 Since we aren't dealing with function descriptors, use %pS instead of %pF to fix it: # cat /sys/kernel/debug/tracing/stack_trace Depth Size Location (26 entries) ----- ---- -------- 0) 5424 112 ftrace_call+0x4/0x8 1) 5312 160 .current_io_context+0x28/0x74 2) 5152 160 .get_io_context+0x48/0xa0 3) 4992 240 .cfq_set_request+0x94/0x4c4 4) 4752 160 .elv_set_request+0x60/0x84 5) 4592 192 .get_request+0x2d4/0x468 6) 4400 256 .get_request_wait+0x7c/0x258 7) 4144 208 .__make_request+0x49c/0x610 8) 3936 272 .generic_make_request+0x390/0x434 Signed-off-by: Anton Blanchard <anton@samba.org> Cc: rostedt@goodmis.org Cc: fweisbec@gmail.com LKML-Reference: <20100825013238.GE28360@kryten> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2010-08-25 13:08:48 +02:00
..
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2010-08-07 12:42:58 -07:00
Makefile	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:30:52 -07:00
blktrace.c	block: add secure discard	2010-08-12 08:43:30 -07:00
ftrace.c	tracing: Remove ftrace_preempt_disable/enable	2010-06-03 19:32:38 -04:00
power-traces.c	…
ring_buffer.c	Merge branch 'tip/perf/urgent-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into trace/tip/perf/urgent-4	2010-08-16 11:17:30 -04:00
ring_buffer_benchmark.c	…
trace.c	Merge branch 'tip/perf/urgent-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into trace/tip/perf/urgent-4	2010-08-16 11:17:30 -04:00
trace.h	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:30:52 -07:00
trace_branch.c	…
trace_clock.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:39:22 -07:00
trace_entries.h	tracing: Remove special traces	2010-07-20 14:31:07 +02:00
trace_event_perf.c	perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call	2010-08-02 01:30:56 +02:00
trace_events.c	Merge branch 'tip/perf/urgent-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into trace/tip/perf/urgent-4	2010-08-16 11:17:30 -04:00
trace_events_filter.c	tracing: Remove test of NULL define_fields callback	2010-06-28 17:12:52 -04:00
trace_export.c	tracing: Remove redundant raw_init callbacks	2010-06-28 17:12:53 -04:00
trace_functions.c	tracing: Remove ftrace_preempt_disable/enable	2010-06-03 19:32:38 -04:00
trace_functions_graph.c	Merge branch 'tip/perf/urgent-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into trace/tip/perf/urgent-4	2010-08-16 11:17:30 -04:00
trace_irqsoff.c	tracing: Shrink max latency ringbuffer if unnecessary	2010-07-21 10:20:17 -04:00
trace_kdb.c	ftrace,kdb: Allow dumping a specific cpu's buffer with ftdump	2010-08-05 09:22:23 -05:00
trace_kprobe.c	tracing/kprobes: unregister_trace_probe needs to be called under mutex	2010-08-04 12:41:23 -03:00
trace_mmiotrace.c	…
trace_nop.c	…
trace_output.c	Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core	2010-07-23 09:10:29 +02:00
trace_output.h	…
trace_printk.c	…
trace_sched_switch.c	…
trace_sched_wakeup.c	tracing: Shrink max latency ringbuffer if unnecessary	2010-07-21 10:20:17 -04:00
trace_selftest.c	tracing: Remove special traces	2010-07-20 14:31:07 +02:00
trace_selftest_dynamic.c	…
trace_stack.c	tracing/trace_stack: Fix stack trace on ppc64	2010-08-25 13:08:48 +02:00
trace_stat.c	…
trace_stat.h	…
trace_syscalls.c	tracing: Use a global field list for all syscall exit events	2010-06-28 17:12:44 -04:00
trace_workqueue.c	…