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ftrace: rename unlikely iter_ctrl to branch

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Impact: rename of iter_ctrl unlikely to branch

The unlikely name is ugly. This patch converts the iter_ctrl command
"unlikely" and "nounlikely" to "branch" and "nobranch" respectively.

It also renames a lot of internal functions to use "branch" instead
of "unlikely".

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-11-12 15:24:24 -05:00 committed by Ingo Molnar
parent 2ed84eeb88
commit 9f029e83e9
3 changed files with 45 additions and 45 deletions
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14
kernel/trace/trace.c
View File

@ -259,7 +259,7 @@ static const char *trace_options[] = {
"ftrace_printk",
"ftrace_preempt",
#ifdef CONFIG_BRANCH_TRACER
"unlikely",
"branch",
#endif
NULL
};
@ -1651,8 +1651,8 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
trace_seq_print_cont(s, iter);
break;
}
case TRACE_UNLIKELY: {
struct trace_unlikely *field;
case TRACE_BRANCH: {
struct trace_branch *field;
trace_assign_type(field, entry);
@ -1802,8 +1802,8 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
return print_return_function(iter);
break;
}
case TRACE_UNLIKELY: {
struct trace_unlikely *field;
case TRACE_BRANCH: {
struct trace_branch *field;
trace_assign_type(field, entry);
@ -2619,7 +2619,7 @@ static int tracing_set_tracer(char *buf)
if (t == current_trace)
goto out;
trace_unlikely_disable();
trace_branch_disable();
if (current_trace && current_trace->reset)
current_trace->reset(tr);
@ -2627,7 +2627,7 @@ static int tracing_set_tracer(char *buf)
if (t->init)
t->init(tr);
trace_unlikely_enable(tr);
trace_branch_enable(tr);
out:
mutex_unlock(&trace_types_lock);

26
kernel/trace/trace.h
View File

@ -22,7 +22,7 @@ enum trace_type {
TRACE_SPECIAL,
TRACE_MMIO_RW,
TRACE_MMIO_MAP,
TRACE_UNLIKELY,
TRACE_BRANCH,
TRACE_BOOT_CALL,
TRACE_BOOT_RET,
TRACE_FN_RET,
@ -137,7 +137,7 @@ struct trace_boot_ret {
#define TRACE_FUNC_SIZE 30
#define TRACE_FILE_SIZE 20
struct trace_unlikely {
struct trace_branch {
struct trace_entry ent;
unsigned line;
char func[TRACE_FUNC_SIZE+1];
@ -247,7 +247,7 @@ extern void __ftrace_bad_type(void);
TRACE_MMIO_MAP); \
IF_ASSIGN(var, ent, struct trace_boot_call, TRACE_BOOT_CALL);\
IF_ASSIGN(var, ent, struct trace_boot_ret, TRACE_BOOT_RET);\
IF_ASSIGN(var, ent, struct trace_unlikely, TRACE_UNLIKELY); \
IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
IF_ASSIGN(var, ent, struct ftrace_ret_entry, TRACE_FN_RET);\
__ftrace_bad_type(); \
} while (0)
@ -469,7 +469,7 @@ enum trace_iterator_flags {
TRACE_ITER_PRINTK = 0x400,
TRACE_ITER_PREEMPTONLY = 0x800,
#ifdef CONFIG_BRANCH_TRACER
TRACE_ITER_UNLIKELY = 0x1000,
TRACE_ITER_BRANCH = 0x1000,
#endif
};
@ -531,25 +531,25 @@ static inline void ftrace_preempt_enable(int resched)
}
#ifdef CONFIG_BRANCH_TRACER
extern int enable_unlikely_tracing(struct trace_array *tr);
extern void disable_unlikely_tracing(void);
static inline int trace_unlikely_enable(struct trace_array *tr)
extern int enable_branch_tracing(struct trace_array *tr);
extern void disable_branch_tracing(void);
static inline int trace_branch_enable(struct trace_array *tr)
{
if (trace_flags & TRACE_ITER_UNLIKELY)
return enable_unlikely_tracing(tr);
if (trace_flags & TRACE_ITER_BRANCH)
return enable_branch_tracing(tr);
return 0;
}
static inline void trace_unlikely_disable(void)
static inline void trace_branch_disable(void)
{
/* due to races, always disable */
disable_unlikely_tracing();
disable_branch_tracing();
}
#else
static inline int trace_unlikely_enable(struct trace_array *tr)
static inline int trace_branch_enable(struct trace_array *tr)
{
return 0;
}
static inline void trace_unlikely_disable(void)
static inline void trace_branch_disable(void)
{
}
#endif /* CONFIG_BRANCH_TRACER */

50
kernel/trace/trace_unlikely.c
View File

@ -17,16 +17,16 @@
#ifdef CONFIG_BRANCH_TRACER
static int unlikely_tracing_enabled __read_mostly;
static DEFINE_MUTEX(unlikely_tracing_mutex);
static struct trace_array *unlikely_tracer;
static int branch_tracing_enabled __read_mostly;
static DEFINE_MUTEX(branch_tracing_mutex);
static struct trace_array *branch_tracer;
static void
probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
probe_likely_condition(struct ftrace_branch_data *f, int val, int expect)
{
struct trace_array *tr = unlikely_tracer;
struct trace_array *tr = branch_tracer;
struct ring_buffer_event *event;
struct trace_unlikely *entry;
struct trace_branch *entry;
unsigned long flags, irq_flags;
int cpu, pc;
const char *p;
@ -54,7 +54,7 @@ probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
pc = preempt_count();
entry = ring_buffer_event_data(event);
tracing_generic_entry_update(&entry->ent, flags, pc);
entry->ent.type = TRACE_UNLIKELY;
entry->ent.type = TRACE_BRANCH;
/* Strip off the path, only save the file */
p = f->file + strlen(f->file);
@ -77,51 +77,51 @@ probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
}
static inline
void trace_likely_condition(struct ftrace_likely_data *f, int val, int expect)
void trace_likely_condition(struct ftrace_branch_data *f, int val, int expect)
{
if (!unlikely_tracing_enabled)
if (!branch_tracing_enabled)
return;
probe_likely_condition(f, val, expect);
}
int enable_unlikely_tracing(struct trace_array *tr)
int enable_branch_tracing(struct trace_array *tr)
{
int ret = 0;
mutex_lock(&unlikely_tracing_mutex);
unlikely_tracer = tr;
mutex_lock(&branch_tracing_mutex);
branch_tracer = tr;
/*
* Must be seen before enabling. The reader is a condition
* where we do not need a matching rmb()
*/
smp_wmb();
unlikely_tracing_enabled++;
mutex_unlock(&unlikely_tracing_mutex);
branch_tracing_enabled++;
mutex_unlock(&branch_tracing_mutex);
return ret;
}
void disable_unlikely_tracing(void)
void disable_branch_tracing(void)
{
mutex_lock(&unlikely_tracing_mutex);
mutex_lock(&branch_tracing_mutex);
if (!unlikely_tracing_enabled)
if (!branch_tracing_enabled)
goto out_unlock;
unlikely_tracing_enabled--;
branch_tracing_enabled--;
out_unlock:
mutex_unlock(&unlikely_tracing_mutex);
mutex_unlock(&branch_tracing_mutex);
}
#else
static inline
void trace_likely_condition(struct ftrace_likely_data *f, int val, int expect)
void trace_likely_condition(struct ftrace_branch_data *f, int val, int expect)
{
}
#endif /* CONFIG_BRANCH_TRACER */
void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect)
void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect)
{
/*
* I would love to have a trace point here instead, but the
@ -148,7 +148,7 @@ static void *
t_next(struct seq_file *m, void *v, loff_t *pos)
{
struct ftrace_pointer *f = m->private;
struct ftrace_likely_data *p = v;
struct ftrace_branch_data *p = v;
(*pos)++;
@ -180,7 +180,7 @@ static void t_stop(struct seq_file *m, void *p)
static int t_show(struct seq_file *m, void *v)
{
struct ftrace_likely_data *p = v;
struct ftrace_branch_data *p = v;
const char *f;
unsigned long percent;
@ -252,7 +252,7 @@ static struct ftrace_pointer ftrace_unlikely_pos = {
.stop = __stop_unlikely_profile,
};
static __init int ftrace_unlikely_init(void)
static __init int ftrace_branch_init(void)
{
struct dentry *d_tracer;
struct dentry *entry;
@ -275,4 +275,4 @@ static __init int ftrace_unlikely_init(void)
return 0;
}
device_initcall(ftrace_unlikely_init);
device_initcall(ftrace_branch_init);