Li Zefan 694ce0a544 ftrace: Don't manipulate @pos in t_start() ...

It's rather confusing that in t_start(), in some cases @pos is
incremented, and in some cases it's decremented and then incremented.

This patch rewrites t_start() in a much more general way.

Thus we fix a bug that if ftrace_filtered == 1, functions have tracer
hooks won't be printed, because the branch is always unreachable:

static void *t_start(...)
{
	...
	if (!p)
		return t_hash_start(m, pos);
	return p;
}

Before:
  # echo 'sys_open' > /mnt/tracing/set_ftrace_filter
  # echo 'sys_write:traceon:4' >> /mnt/tracing/set_ftrace_filter
  sys_open

After:
  # echo 'sys_open' > /mnt/tracing/set_ftrace_filter
  # echo 'sys_write:traceon:4' >> /mnt/tracing/set_ftrace_filter
  sys_open
  sys_write:traceon:count=4

Reviewed-by: Liming Wang <liming.wang@windriver.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4A41874B.4090507@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-06-24 11:02:53 +02:00

..

gcov

gcov: enable GCOV_PROFILE_ALL for x86_64

2009-06-18 13:03:58 -07:00

irq

Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 11:30:01 -07:00

power

mm, PM/Freezer: Disable OOM killer when tasks are frozen

2009-06-16 19:47:40 -07:00

time

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 10:51:44 -07:00

trace

ftrace: Don't manipulate @pos in t_start()

2009-06-24 11:02:53 +02:00

.gitignore

Update kernel/.gitignore with new auto-generated files

2008-02-09 23:27:01 -08:00

acct.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

async.c

async: Fix lack of boot-time console due to insufficient synchronization

2009-06-08 12:31:53 -07:00

audit_tree.c

Switch collect_mounts() to struct path

2009-06-11 21:36:01 -04:00

audit.c

Audit: remove spaces from audit_log_d_path

2009-04-05 13:49:04 -04:00

audit.h

fixing audit rule ordering mess, part 1

2009-01-04 15:14:41 -05:00

auditfilter.c

inotify: use GFP_NOFS in kernel_event() to work around a lockdep false-positive

2009-05-06 16:36:09 -07:00

auditsc.c

Audit: remove spaces from audit_log_d_path

2009-04-05 13:49:04 -04:00

backtracetest.c

backtrace: replace timer with tasklet + completions

2008-06-27 18:09:16 +02:00

bounds.c

Add kbuild.h that contains common definitions for kbuild users

2008-04-29 08:06:29 -07:00

capability.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

cgroup_debug.c

debug cgroup: remove unneeded cgroup_lock

2009-04-02 19:04:54 -07:00

cgroup_freezer.c

freezer_cg: disable writing freezer.state of root cgroup

2008-11-12 17:17:16 -08:00

cgroup.c

cgroups: forbid noprefix if mounting more than just cpuset subsystem

2009-06-18 13:03:46 -07:00

compat.c

signals: implement sys_rt_tgsigqueueinfo

2009-04-30 19:24:24 +02:00

configs.c

kernel/configs.c: remove useless comments

2008-10-20 08:52:34 -07:00

cpu.c

mm/init: cpu_hotplug_init() must be initialized before SLAB

2009-06-22 21:18:12 -07:00

cpuset.c

cpuset,mm: update tasks' mems_allowed in time

2009-06-16 19:47:31 -07:00

cred-internals.h

CRED: Inaugurate COW credentials

2008-11-14 10:39:23 +11:00

cred.c

CRED: Rename cred_exec_mutex to reflect that it's a guard against ptrace

2009-05-11 08:15:36 +10:00

delayacct.c

schedstat: consolidate per-task cpu runtime stats

2008-12-18 13:54:01 +01:00

dma-coherent.c

dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy.

2009-01-21 18:51:53 +09:00

dma.c

kernel/dma.c: remove a CVS keyword

2008-10-16 11:21:30 -07:00

exec_domain.c

Get rid of indirect include of fs_struct.h

2009-03-31 23:00:27 -04:00

exit.c

ptrace: wait_task_zombie: do not account traced sub-threads

2009-06-19 16:46:06 -07:00

extable.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

fork.c

copy_process(): remove the unneeded clear_tsk_thread_flag(TIF_SIGPENDING)

2009-06-18 13:03:52 -07:00

freezer.c

freezer_cg: use thaw_process() in unfreeze_cgroup()

2008-10-30 11:38:45 -07:00

futex_compat.c

CRED: Use RCU to access another task's creds and to release a task's own creds

2008-11-14 10:39:19 +11:00

futex.c

futex: fix restart in wait_requeue_pi

2009-05-20 10:34:32 +02:00

groups.c

groups: move code to kernel/groups.c

2009-06-16 19:47:48 -07:00

hrtimer.c

Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

2009-06-17 09:46:33 -07:00

hung_task.c

softlockup: ensure the task has been switched out once

2009-02-11 11:04:16 +01:00

itimer.c

timers: split process wide cpu clocks/timers

2009-02-05 13:04:33 +01:00

kallsyms.c

kernel/kallsyms.c: replace deprecated __initcall with device_initcall and fix whitespace

2009-06-09 22:37:52 +02:00

Kconfig.freezer

container freezer: implement freezer cgroup subsystem

2008-10-20 08:52:34 -07:00

Kconfig.hz

sched: fix SCHED_HRTICK dependency

2008-07-28 14:37:38 +02:00

Kconfig.preempt

rcu: provide RCU options on non-preempt architectures too

2008-12-25 09:31:28 +01:00

kexec.c

PM core: rename suspend and resume functions

2009-06-12 21:32:31 +02:00

kfifo.c

kernel/kfifo.c: replace conditional test with is_power_of_2()

2009-06-16 19:47:47 -07:00

kgdb.c

sysrq, intel_fb: fix sysrq g collision

2009-05-15 07:56:24 -05:00

kmod.c

kmod: Release sub_info on cred allocation failure.

2009-05-26 12:11:19 -07:00

kprobes.c

kprobes: fix to use text_mutex around arm/disarm kprobe

2009-05-08 16:23:48 -07:00

ksysfs.c

kernel/ksysfs.c:fix dependence on CONFIG_NET

2009-01-06 10:44:31 -08:00

kthread.c

kthreads: rework kthread_stop()

2009-06-18 13:03:54 -07:00

latencytop.c

sched, latencytop: incorporate review feedback from Andrew Morton

2009-02-11 10:18:04 +01:00

lockdep_internals.h

lockdep: increase MAX_LOCKDEP_ENTRIES and MAX_LOCKDEP_CHAINS

2009-05-12 19:59:52 +02:00

lockdep_proc.c

lockstat: warn about disabled lock debugging

2009-02-14 23:28:28 +01:00

lockdep_states.h

lockdep: move state bit definitions around

2009-02-14 23:27:59 +01:00

lockdep.c

Merge branch 'linus' into tracing/core

2009-05-07 11:17:34 +02:00

Makefile

gcov: add gcov profiling infrastructure

2009-06-18 13:03:57 -07:00

marker.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

module.c

kernel: constructor support

2009-06-18 13:03:57 -07:00

mutex-debug.c

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex-debug.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex.c

Merge branch 'linus' into perfcounters/core

2009-06-11 17:55:42 +02:00

mutex.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

notifier.c

Merge commit 'v2.6.28-rc6' into core/debug

2008-11-26 08:22:50 +01:00

ns_cgroup.c

cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups

2009-04-02 19:04:53 -07:00

nsproxy.c

nsproxy: extract create_nsproxy()

2009-06-18 13:03:56 -07:00

panic.c

Fix caller information for warn_slowpath_null

2009-05-16 13:41:28 -07:00

params.c

module_param: allow 'bool' module_params to be bool, not just int.

2009-06-12 21:46:58 +09:30

perf_counter.c

perf_counter: Push perf_sample_data through the swcounter code

2009-06-20 12:30:30 +02:00

pid_namespace.c

pidns: rewrite copy_pid_ns()

2009-06-18 13:03:55 -07:00

pid.c

pids: clean up find_task_by_pid variants

2009-06-18 13:03:55 -07:00

pm_qos_params.c

pm_qos_requirement might sleep

2008-09-02 19:21:40 -07:00

posix-cpu-timers.c

kernel/posix-cpu-timers.c: fix sparse warning

2009-04-30 08:08:31 +02:00

posix-timers.c

[CVE-2009-0029] System call wrappers part 05

2009-01-14 14:15:20 +01:00

printk.c

printk: Add KERN_DEFAULT printk log-level

2009-06-16 11:02:28 -07:00

profile.c

page allocator: do not check NUMA node ID when the caller knows the node is valid

2009-06-16 19:47:32 -07:00

ptrace.c

ptrace: don't take tasklist to get/set ->last_siginfo

2009-06-18 13:03:52 -07:00

rcuclassic.c

kmemtrace, rcu: fix linux/rcutree.h and linux/rcuclassic.h dependencies

2009-04-03 12:23:02 +02:00

rcupdate.c

RCU: Don't try and predeclare inline funcs as it upsets some versions of gcc

2009-04-15 13:55:14 -07:00

rcupreempt_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcupreempt.c

rcu: rcu_sched_grace_period(): kill the bogus flush_signals()

2009-05-05 20:28:05 +02:00

rcutorture.c

cpumask: convert rcutorture.c

2009-03-30 22:05:16 +10:30

rcutree_trace.c

rcu: Add __rcu_pending tracing to hierarchical RCU

2009-04-14 11:33:43 +02:00

rcutree.c

rcu: Add __rcu_pending tracing to hierarchical RCU

2009-04-14 11:33:43 +02:00

rcutree.h

kmemtrace, rcu: fix rcu_tree_trace.c data structure dependencies

2009-04-03 12:23:03 +02:00

relay.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

res_counter.c

memcg: add interface to reset limits

2009-06-18 13:03:48 -07:00

resource.c

Remove 'recurse into child resources' logic from 'reserve_region_with_split()'

2009-04-18 21:44:24 -07:00

rtmutex_common.h

rt_mutex: add proxy lock routines

2009-04-06 11:14:02 +02:00

rtmutex-debug.c

…

rtmutex-debug.h

…

rtmutex-tester.c

sysdev: Pass the attribute to the low level sysdev show/store function

2008-07-21 21:55:02 -07:00

rtmutex.c

trivial: fix ETIMEOUT -> ETIMEDOUT typos

2009-06-12 18:01:50 +02:00

rtmutex.h

…

rwsem.c

…

sched_clock.c

sched: Fix fallback sched_clock()'s offset when using jiffies

2009-05-09 10:08:19 +02:00

sched_cpupri.c

sched: Remove unneeded __ref tag

2009-06-17 16:08:04 +02:00

sched_cpupri.h

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sched_debug.c

sched: Hide runqueues from direct refer at source code level

2009-06-17 18:29:42 +02:00

sched_fair.c

sched: Fix out of scope variable access in sched_slice()

2009-06-17 18:37:54 +02:00

sched_features.h

Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-30 17:17:35 -07:00

sched_idletask.c

sched, timers: move calc_load() to scheduler

2009-05-15 15:32:45 +02:00

sched_rt.c

cpumask: alloc zeroed cpumask for static cpumask_var_ts

2009-06-09 22:30:27 +09:30

sched_stats.h

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched.c

Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 11:29:32 -07:00

seccomp.c

x86-64: seccomp: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

semaphore.c

semaphore: __down_common: use signal_pending_state()

2008-08-05 14:33:47 -07:00

signal.c

ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage

2009-06-18 13:03:52 -07:00

slow-work.c

slow-work: use round_jiffies() for thread pool's cull and OOM timers

2009-06-16 19:47:49 -07:00

smp.c

cpumask: alloc zeroed cpumask for static cpumask_var_ts

2009-06-09 22:30:27 +09:30

softirq.c

softirq: introduce statistics for softirq

2009-06-18 13:03:40 -07:00

softlockup.c

softlockup: decouple hung tasks check from softlockup detection

2009-01-16 14:06:04 +01:00

spinlock.c

Allow rwlocks to re-enable interrupts

2009-04-02 19:05:11 -07:00

srcu.c

…

stacktrace.c

stacktrace: provide save_stack_trace_tsk() weak alias

2008-12-25 11:44:43 +01:00

stop_machine.c

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sys_ni.c

Merge commit 'v2.6.29-rc2' into perfcounters/core

2009-01-21 16:37:27 +01:00

sys.c

groups: move code to kernel/groups.c

2009-06-16 19:47:48 -07:00

sysctl_check.c

net: add ARP notify option for devices

2009-02-01 01:04:33 -08:00

sysctl.c

sysctl.c: remove unused variable

2009-06-18 13:03:54 -07:00

taskstats.c

cpumask: convert rest of files in kernel/

2009-01-01 10:12:28 +10:30

test_kprobes.c

kprobes: add tests for register_kprobes

2009-01-06 15:59:20 -08:00

time.c

[CVE-2009-0029] System call wrappers part 01

2009-01-14 14:15:18 +01:00

timeconst.pl

Make constants in kernel/timeconst.h fixed 64 bits

2008-05-02 16:18:42 -07:00

timer.c

Merge branch 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-15 10:06:19 -07:00

tracepoint.c

tracepoints: dont update zero-sized tracepoint sections

2009-03-18 19:55:00 +01:00

tsacct.c

Fix fixpoint divide exception in acct_update_integrals

2009-03-09 08:13:35 -07:00

uid16.c

[CVE-2009-0029] System call wrappers part 19

2009-01-14 14:15:26 +01:00

up.c

smp_call_function_single(): be slightly less stupid, fix #2

2009-01-12 16:04:37 +01:00

user_namespace.c

Fix recursive lock in free_uid()/free_user_ns()

2009-02-27 16:26:21 -08:00

user.c

sched: delayed cleanup of user_struct

2009-06-15 21:30:23 -07:00

utsname_sysctl.c

proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlers

2009-04-02 19:05:01 -07:00

utsname.c

utsns: extract creeate_uts_ns()

2009-06-18 13:03:55 -07:00

wait.c

wait: don't use __wake_up_common()

2009-04-14 17:17:16 +02:00

workqueue.c

ftrace, workqueuetrace: make workqueue tracepoints use TRACE_EVENT macro

2009-06-02 01:10:40 +02:00