From 4902f8849da6d2805bd291551a6dfd48f1b4f604 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Thu, 22 May 2008 00:22:18 -0400 Subject: [PATCH] ftrace: move ftrace_special to trace.c Move the ftrace_special out of sched_switch to trace.c. Signed-off-by: Steven Rostedt Cc: pq@iki.fi Cc: proski@gnu.org Cc: sandmann@redhat.com Cc: a.p.zijlstra@chello.nl Signed-off-by: Thomas Gleixner --- kernel/trace/trace.c | 27 +++++++++++++++++++++++++-- kernel/trace/trace_sched_switch.c | 24 ------------------------ 2 files changed, 25 insertions(+), 26 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 0567f51bbea4..583fe24903d3 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -941,6 +941,30 @@ tracing_sched_wakeup_trace(struct trace_array *tr, trace_wake_up(); } +void +ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) +{ + struct trace_array *tr = &global_trace; + struct trace_array_cpu *data; + unsigned long flags; + long disabled; + int cpu; + + if (tracing_disabled || current_trace == &no_tracer || !tr->ctrl) + return; + + local_irq_save(flags); + cpu = raw_smp_processor_id(); + data = tr->data[cpu]; + disabled = atomic_inc_return(&data->disabled); + + if (likely(disabled == 1)) + __trace_special(tr, data, arg1, arg2, arg3); + + atomic_dec(&data->disabled); + local_irq_restore(flags); +} + #ifdef CONFIG_FTRACE static void function_trace_call(unsigned long ip, unsigned long parent_ip) @@ -2941,8 +2965,6 @@ __init static int tracer_alloc_buffers(void) int ret = -ENOMEM; int i; - global_trace.ctrl = tracer_enabled; - /* TODO: make the number of buffers hot pluggable with CPUS */ tracing_nr_buffers = num_possible_cpus(); tracing_buffer_mask = cpu_possible_map; @@ -3012,6 +3034,7 @@ __init static int tracer_alloc_buffers(void) current_trace = &no_tracer; /* All seems OK, enable tracing */ + global_trace.ctrl = tracer_enabled; tracing_disabled = 0; return 0; diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index d25ffa5eaf2b..798ec0dc863c 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -125,30 +125,6 @@ wake_up_callback(void *probe_data, void *call_data, wakeup_func(probe_data, __rq, task, curr); } -void -ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) -{ - struct trace_array *tr = ctx_trace; - struct trace_array_cpu *data; - unsigned long flags; - long disabled; - int cpu; - - if (!tracer_enabled) - return; - - local_irq_save(flags); - cpu = raw_smp_processor_id(); - data = tr->data[cpu]; - disabled = atomic_inc_return(&data->disabled); - - if (likely(disabled == 1)) - __trace_special(tr, data, arg1, arg2, arg3); - - atomic_dec(&data->disabled); - local_irq_restore(flags); -} - static void sched_switch_reset(struct trace_array *tr) { int cpu;