Rajesh Bhagat db6544e007 ftrace: Fix function_graph for archs that test ftrace_trace_function ... When CONFIG_DYNAMIC_FTRACE is not set, some archs (ARM) test the variable function_trace_function to determine if it should call the function tracer. If it is not set to ftrace_stub, then it will call the function and return, and not call the function graph tracer. But some of these archs (ARM) do not have the assembly code to test if function tracing is enabled or not (quick stop of tracing) and it calls the helper routine ftrace_test_stop_func() instead. If function tracer is enabled and then disabled, the variable ftrace_trace_function is still set to the helper routine ftrace_test_stop_func(), and not to ftrace_stub. This will prevent the function graph tracer from ever running. Output before patch /debug/tracing # echo function > current_tracer /debug/tracing # echo function_graph > current_tracer /debug/tracing # cat trace Output after patch /debug/tracing # echo function > current_tracer /debug/tracing # echo function_graph > current_tracer /debug/tracing # cat trace 0) ! 253.375 us | } /* irq_enter */ 0) | generic_handle_irq() { 0) | handle_fasteoi_irq() { 0) 9.208 us | _raw_spin_lock(); 0) | handle_irq_event() { 0) | handle_irq_event_percpu() { Signed-off-by: Rajesh Bhagat <rajesh.lnx@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2012-03-13 15:07:37 -04:00
..
debug
events	Merge branch 'perf/urgent' into perf/core	2012-01-31 13:02:37 +01:00
gcov
irq	tracing/softirq: Move __raise_softirq_irqoff() out of header	2012-02-03 09:48:19 -05:00
power	PM / Hibernate: Fix s2disk regression related to freezing workqueues	2012-01-29 20:35:52 +01:00
sched	sched/rt: Fix task stack corruption under __ARCH_WANT_INTERRUPTS_ON_CTXSW	2012-01-27 12:49:41 +01:00
time
trace	ftrace: Fix function_graph for archs that test ftrace_trace_function	2012-03-13 15:07:37 -04:00
.gitignore
acct.c
async.c
audit.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit	2012-01-17 16:41:31 -08:00
audit.h	audit: remove AUDIT_SETUP_CONTEXT as it isn't used	2012-01-17 16:16:57 -05:00
audit_tree.c
audit_watch.c
auditfilter.c	audit: allow interfield comparison in audit rules	2012-01-17 16:17:01 -05:00
auditsc.c	kernel-doc: fix new warnings in auditsc.c	2012-01-23 08:44:53 -08:00
backtracetest.c
bounds.c
capability.c	Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"	2012-01-17 10:19:41 -08:00
cgroup.c
cgroup_freezer.c
compat.c
configs.c
cpu.c
cpu_pm.c
cpuset.c
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	sched: Fix ancient race in do_exit()	2012-01-27 11:55:36 +01:00
extable.c
fork.c	Fix race in process_vm_rw_core	2012-02-02 12:55:17 -08:00
freezer.c
futex.c
futex_compat.c
groups.c
hrtimer.c
hung_task.c
irq_work.c
itimer.c
jump_label.c
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c
kfifo.c
kmod.c
kprobes.c	kprobes: initialize before using a hlist	2012-01-23 08:38:48 -08:00
ksysfs.c
kthread.c
latencytop.c
lockdep.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile
module.c
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
nsproxy.c
padata.c
panic.c
params.c
pid.c
pid_namespace.c
posix-cpu-timers.c
posix-timers.c
printk.c	printk/tracing: Add console output tracing	2012-02-13 13:46:05 -05:00
profile.c
ptrace.c
range.c
rcu.h
rcupdate.c
rcutiny.c
rcutiny_plugin.h
rcutorture.c
rcutree.c
rcutree.h
rcutree_plugin.h
rcutree_trace.c
relay.c
res_counter.c	net: introduce res_counter_charge_nofail() for socket allocations	2012-01-22 15:08:46 -05:00
resource.c
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
seccomp.c	seccomp: audit abnormal end to a process due to seccomp	2012-01-17 16:16:55 -05:00
semaphore.c
signal.c
smp.c
softirq.c	tracing/softirq: Move __raise_softirq_irqoff() out of header	2012-02-03 09:48:19 -05:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c
sys.c
sys_ni.c
sysctl.c
sysctl_binary.c
sysctl_check.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c
tracepoint.c
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
watchdog.c	watchdog: Fix code/comments mismatches	2012-02-11 15:11:33 +01:00
workqueue.c
workqueue_sched.h