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ftrace: build fix

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Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-05-12 21:20:49 +02:00 committed by Thomas Gleixner
parent 0fd9e0dac9
commit 2e0f576185
2 changed files with 67 additions and 46 deletions
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109
kernel/trace/trace.c
View File

@ -432,47 +432,6 @@ notrace void tracing_reset(struct trace_array_cpu *data)
data->trace_tail_idx = 0;
}
#ifdef CONFIG_FTRACE
static notrace void
function_trace_call(unsigned long ip, unsigned long parent_ip)
{
struct trace_array *tr = &global_trace;
struct trace_array_cpu *data;
unsigned long flags;
long disabled;
int cpu;
if (unlikely(!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))
ftrace(tr, data, ip, parent_ip, flags);
atomic_dec(&data->disabled);
local_irq_restore(flags);
}
static struct ftrace_ops trace_ops __read_mostly =
{
.func = function_trace_call,
};
#endif
notrace void tracing_start_function_trace(void)
{
register_ftrace_function(&trace_ops);
}
notrace void tracing_stop_function_trace(void)
{
unregister_ftrace_function(&trace_ops);
}
#define SAVED_CMDLINES 128
static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
static unsigned map_cmdline_to_pid[SAVED_CMDLINES];
@ -635,7 +594,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags)
}
notrace void
ftrace(struct trace_array *tr, struct trace_array_cpu *data,
__ftrace(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long ip, unsigned long parent_ip, unsigned long flags)
{
struct trace_entry *entry;
@ -650,6 +609,14 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data,
spin_unlock_irqrestore(&data->lock, irq_flags);
}
notrace void
ftrace(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long ip, unsigned long parent_ip, unsigned long flags)
{
if (likely(!atomic_read(&data->disabled)))
__ftrace(tr, data, ip, parent_ip, flags);
}
notrace void
trace_special(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
@ -688,6 +655,47 @@ tracing_sched_switch_trace(struct trace_array *tr,
spin_unlock_irqrestore(&data->lock, irq_flags);
}
#ifdef CONFIG_FTRACE
static notrace void
function_trace_call(unsigned long ip, unsigned long parent_ip)
{
struct trace_array *tr = &global_trace;
struct trace_array_cpu *data;
unsigned long flags;
long disabled;
int cpu;
if (unlikely(!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))
__ftrace(tr, data, ip, parent_ip, flags);
atomic_dec(&data->disabled);
local_irq_restore(flags);
}
static struct ftrace_ops trace_ops __read_mostly =
{
.func = function_trace_call,
};
notrace void tracing_start_function_trace(void)
{
register_ftrace_function(&trace_ops);
}
notrace void tracing_stop_function_trace(void)
{
unregister_ftrace_function(&trace_ops);
}
#endif
enum trace_file_type {
TRACE_FILE_LAT_FMT = 1,
};
@ -722,7 +730,7 @@ trace_entry_idx(struct trace_array *tr, struct trace_array_cpu *data,
return &array[iter->next_page_idx[cpu]];
}
static struct notrace trace_entry *
static struct trace_entry * notrace
find_next_entry(struct trace_iterator *iter, int *ent_cpu)
{
struct trace_array *tr = iter->tr;
@ -1866,6 +1874,7 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
static cpumask_t mask;
static int start;
unsigned long flags;
int ftrace_save;
int read = 0;
int cpu;
int len;
@ -1944,6 +1953,9 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
cpus_clear(mask);
local_irq_save(flags);
ftrace_save = ftrace_enabled;
ftrace_enabled = 0;
smp_wmb();
for_each_possible_cpu(cpu) {
data = iter->tr->data[cpu];
@ -1951,10 +1963,14 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
continue;
atomic_inc(&data->disabled);
spin_lock(&data->lock);
cpu_set(cpu, mask);
}
for_each_cpu_mask(cpu, mask) {
data = iter->tr->data[cpu];
spin_lock(&data->lock);
}
while (find_next_entry_inc(iter) != NULL) {
int len = iter->seq.len;
@ -1974,8 +1990,13 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
for_each_cpu_mask(cpu, mask) {
data = iter->tr->data[cpu];
spin_unlock(&data->lock);
}
for_each_cpu_mask(cpu, mask) {
data = iter->tr->data[cpu];
atomic_dec(&data->disabled);
}
ftrace_enabled = ftrace_save;
local_irq_restore(flags);
/* Now copy what we have to the user */

2
kernel/trace/trace_functions.c
View File

@ -9,10 +9,10 @@
* Copyright (C) 2004-2006 Ingo Molnar
* Copyright (C) 2004 William Lee Irwin III
*/
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <linux/fs.h>
#include "trace.h"