[PATCH 06/26 v5] tracing: Have function_graph use trace_seq_has_overflowed()

From: Steven Rostedt
Date: Sat Nov 15 2014 - 00:06:22 EST

From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>

Instead of doing individual checks all over the place that makes the code
very messy. Just check trace_seq_has_overflowed() at the end or in
strategic places.

This makes the code much cleaner and also helps with getting closer
to removing the return values of trace_seq_printf() and friends.

Link: http://lkml.kernel.org/r/20141114011410.987913836@xxxxxxxxxxx

Reviewed-by: Petr Mladek <pmladek@xxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace.h | 2 +-
kernel/trace/trace_functions_graph.c | 382 +++++++++++------------------------
2 files changed, 118 insertions(+), 266 deletions(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 19418221b302..c3a37e55ec8b 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -726,7 +726,7 @@ extern unsigned long trace_flags;
extern enum print_line_t
print_graph_function_flags(struct trace_iterator *iter, u32 flags);
extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
-extern enum print_line_t
+extern void
trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
extern void graph_trace_open(struct trace_iterator *iter);
extern void graph_trace_close(struct trace_iterator *iter);
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 55bdf9d7f714..100288d10e1f 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -107,7 +107,7 @@ enum {
FLAGS_FILL_END = 3 << TRACE_GRAPH_PRINT_FILL_SHIFT,
};

-static enum print_line_t
+static void
print_graph_duration(unsigned long long duration, struct trace_seq *s,
u32 flags);

@@ -483,33 +483,24 @@ static int graph_trace_update_thresh(struct trace_array *tr)

static int max_bytes_for_cpu;

-static enum print_line_t
-print_graph_cpu(struct trace_seq *s, int cpu)
+static void print_graph_cpu(struct trace_seq *s, int cpu)
{
- int ret;
-
/*
* Start with a space character - to make it stand out
* to the right a bit when trace output is pasted into
* email:
*/
- ret = trace_seq_printf(s, " %*d) ", max_bytes_for_cpu, cpu);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
+ trace_seq_printf(s, " %*d) ", max_bytes_for_cpu, cpu);
}

#define TRACE_GRAPH_PROCINFO_LENGTH 14

-static enum print_line_t
-print_graph_proc(struct trace_seq *s, pid_t pid)
+static void print_graph_proc(struct trace_seq *s, pid_t pid)
{
char comm[TASK_COMM_LEN];
/* sign + log10(MAX_INT) + '\0' */
char pid_str[11];
int spaces = 0;
- int ret;
int len;
int i;

@@ -524,56 +515,43 @@ print_graph_proc(struct trace_seq *s, pid_t pid)
spaces = TRACE_GRAPH_PROCINFO_LENGTH - len;

/* First spaces to align center */
- for (i = 0; i < spaces / 2; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ for (i = 0; i < spaces / 2; i++)
+ trace_seq_putc(s, ' ');

- ret = trace_seq_printf(s, "%s-%s", comm, pid_str);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_printf(s, "%s-%s", comm, pid_str);

/* Last spaces to align center */
- for (i = 0; i < spaces - (spaces / 2); i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
- return TRACE_TYPE_HANDLED;
+ for (i = 0; i < spaces - (spaces / 2); i++)
+ trace_seq_putc(s, ' ');
}


-static enum print_line_t
-print_graph_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
+static void print_graph_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
{
- if (!trace_seq_putc(s, ' '))
- return 0;
-
- return trace_print_lat_fmt(s, entry);
+ trace_seq_putc(s, ' ');
+ trace_print_lat_fmt(s, entry);
}

/* If the pid changed since the last trace, output this event */
-static enum print_line_t
+static void
verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data)
{
pid_t prev_pid;
pid_t *last_pid;
- int ret;

if (!data)
- return TRACE_TYPE_HANDLED;
+ return;

last_pid = &(per_cpu_ptr(data->cpu_data, cpu)->last_pid);

if (*last_pid == pid)
- return TRACE_TYPE_HANDLED;
+ return;

prev_pid = *last_pid;
*last_pid = pid;

if (prev_pid == -1)
- return TRACE_TYPE_HANDLED;
+ return;
/*
* Context-switch trace line:

@@ -582,33 +560,12 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data)
------------------------------------------

*/
- ret = trace_seq_puts(s,
- " ------------------------------------------\n");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = print_graph_cpu(s, cpu);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = print_graph_proc(s, prev_pid);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = trace_seq_puts(s, " => ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = print_graph_proc(s, pid);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = trace_seq_puts(s,
- "\n ------------------------------------------\n\n");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
+ trace_seq_puts(s, " ------------------------------------------\n");
+ print_graph_cpu(s, cpu);
+ print_graph_proc(s, prev_pid);
+ trace_seq_puts(s, " => ");
+ print_graph_proc(s, pid);
+ trace_seq_puts(s, "\n ------------------------------------------\n\n");
}

static struct ftrace_graph_ret_entry *
@@ -682,103 +639,74 @@ get_return_for_leaf(struct trace_iterator *iter,
return next;
}

-static int print_graph_abs_time(u64 t, struct trace_seq *s)
+static void print_graph_abs_time(u64 t, struct trace_seq *s)
{
unsigned long usecs_rem;

usecs_rem = do_div(t, NSEC_PER_SEC);
usecs_rem /= 1000;

- return trace_seq_printf(s, "%5lu.%06lu | ",
- (unsigned long)t, usecs_rem);
+ trace_seq_printf(s, "%5lu.%06lu | ",
+ (unsigned long)t, usecs_rem);
}

-static enum print_line_t
+static void
print_graph_irq(struct trace_iterator *iter, unsigned long addr,
enum trace_type type, int cpu, pid_t pid, u32 flags)
{
- int ret;
struct trace_seq *s = &iter->seq;
struct trace_entry *ent = iter->ent;

if (addr < (unsigned long)__irqentry_text_start ||
addr >= (unsigned long)__irqentry_text_end)
- return TRACE_TYPE_UNHANDLED;
+ return;

if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
/* Absolute time */
- if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
- ret = print_graph_abs_time(iter->ts, s);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
+ print_graph_abs_time(iter->ts, s);

/* Cpu */
- if (flags & TRACE_GRAPH_PRINT_CPU) {
- ret = print_graph_cpu(s, cpu);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (flags & TRACE_GRAPH_PRINT_CPU)
+ print_graph_cpu(s, cpu);

/* Proc */
if (flags & TRACE_GRAPH_PRINT_PROC) {
- ret = print_graph_proc(s, pid);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- ret = trace_seq_puts(s, " | ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_proc(s, pid);
+ trace_seq_puts(s, " | ");
}

/* Latency format */
- if (trace_flags & TRACE_ITER_LATENCY_FMT) {
- ret = print_graph_lat_fmt(s, ent);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
-
+ if (trace_flags & TRACE_ITER_LATENCY_FMT)
+ print_graph_lat_fmt(s, ent);
}

/* No overhead */
- ret = print_graph_duration(0, s, flags | FLAGS_FILL_START);
- if (ret != TRACE_TYPE_HANDLED)
- return ret;
+ print_graph_duration(0, s, flags | FLAGS_FILL_START);

if (type == TRACE_GRAPH_ENT)
- ret = trace_seq_puts(s, "==========>");
+ trace_seq_puts(s, "==========>");
else
- ret = trace_seq_puts(s, "<==========");
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = print_graph_duration(0, s, flags | FLAGS_FILL_END);
- if (ret != TRACE_TYPE_HANDLED)
- return ret;
+ trace_seq_puts(s, "<==========");

- ret = trace_seq_putc(s, '\n');
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
+ print_graph_duration(0, s, flags | FLAGS_FILL_END);
+ trace_seq_putc(s, '\n');
}

-enum print_line_t
+void
trace_print_graph_duration(unsigned long long duration, struct trace_seq *s)
{
unsigned long nsecs_rem = do_div(duration, 1000);
/* log10(ULONG_MAX) + '\0' */
char usecs_str[21];
char nsecs_str[5];
- int ret, len;
+ int len;
int i;

sprintf(usecs_str, "%lu", (unsigned long) duration);

/* Print msecs */
- ret = trace_seq_printf(s, "%s", usecs_str);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_printf(s, "%s", usecs_str);

len = strlen(usecs_str);

@@ -787,79 +715,63 @@ trace_print_graph_duration(unsigned long long duration, struct trace_seq *s)
size_t slen = min_t(size_t, sizeof(nsecs_str), 8UL - len);

snprintf(nsecs_str, slen, "%03lu", nsecs_rem);
- ret = trace_seq_printf(s, ".%s", nsecs_str);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_printf(s, ".%s", nsecs_str);
len += strlen(nsecs_str);
}

- ret = trace_seq_puts(s, " us ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, " us ");

/* Print remaining spaces to fit the row's width */
- for (i = len; i < 7; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
- return TRACE_TYPE_HANDLED;
+ for (i = len; i < 7; i++)
+ trace_seq_putc(s, ' ');
}

-static enum print_line_t
+static void
print_graph_duration(unsigned long long duration, struct trace_seq *s,
u32 flags)
{
- int ret = -1;
+ bool duration_printed = false;

if (!(flags & TRACE_GRAPH_PRINT_DURATION) ||
!(trace_flags & TRACE_ITER_CONTEXT_INFO))
- return TRACE_TYPE_HANDLED;
+ return;

/* No real adata, just filling the column with spaces */
switch (flags & TRACE_GRAPH_PRINT_FILL_MASK) {
case FLAGS_FILL_FULL:
- ret = trace_seq_puts(s, " | ");
- return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, " | ");
+ return;
case FLAGS_FILL_START:
- ret = trace_seq_puts(s, " ");
- return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, " ");
+ return;
case FLAGS_FILL_END:
- ret = trace_seq_puts(s, " |");
- return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, " |");
+ return;
}

/* Signal a overhead of time execution to the output */
if (flags & TRACE_GRAPH_PRINT_OVERHEAD) {
/* Duration exceeded 100 usecs */
- if (duration > 100000ULL)
- ret = trace_seq_puts(s, "! ");
+ if (duration > 100000ULL) {
+ trace_seq_puts(s, "! ");
+ duration_printed = true;
+
/* Duration exceeded 10 usecs */
- else if (duration > 10000ULL)
- ret = trace_seq_puts(s, "+ ");
+ } else if (duration > 10000ULL) {
+ trace_seq_puts(s, "+ ");
+ duration_printed = true;
+ }
}

/*
- * The -1 means we either did not exceed the duration tresholds
- * or we dont want to print out the overhead. Either way we need
- * to fill out the space.
+ * If we did not exceed the duration tresholds or we dont want
+ * to print out the overhead. Either way we need to fill out the space.
*/
- if (ret == -1)
- ret = trace_seq_puts(s, " ");
-
- /* Catching here any failure happenned above */
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = trace_print_graph_duration(duration, s);
- if (ret != TRACE_TYPE_HANDLED)
- return ret;
+ if (!duration_printed)
+ trace_seq_puts(s, " ");

- ret = trace_seq_puts(s, "| ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
+ trace_print_graph_duration(duration, s);
+ trace_seq_puts(s, "| ");
}

/* Case of a leaf function on its call entry */
@@ -873,7 +785,6 @@ print_graph_entry_leaf(struct trace_iterator *iter,
struct ftrace_graph_ret *graph_ret;
struct ftrace_graph_ent *call;
unsigned long long duration;
- int ret;
int i;

graph_ret = &ret_entry->ret;
@@ -899,22 +810,15 @@ print_graph_entry_leaf(struct trace_iterator *iter,
}

/* Overhead and duration */
- ret = print_graph_duration(duration, s, flags);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_duration(duration, s, flags);

/* Function */
- for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++)
+ trace_seq_putc(s, ' ');

- ret = trace_seq_printf(s, "%ps();\n", (void *)call->func);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_printf(s, "%ps();\n", (void *)call->func);

- return TRACE_TYPE_HANDLED;
+ return trace_handle_return(s);
}

static enum print_line_t
@@ -924,7 +828,6 @@ print_graph_entry_nested(struct trace_iterator *iter,
{
struct ftrace_graph_ent *call = &entry->graph_ent;
struct fgraph_data *data = iter->private;
- int ret;
int i;

if (data) {
@@ -940,19 +843,15 @@ print_graph_entry_nested(struct trace_iterator *iter,
}

/* No time */
- ret = print_graph_duration(0, s, flags | FLAGS_FILL_FULL);
- if (ret != TRACE_TYPE_HANDLED)
- return ret;
+ print_graph_duration(0, s, flags | FLAGS_FILL_FULL);

/* Function */
- for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++)
+ trace_seq_putc(s, ' ');
+
+ trace_seq_printf(s, "%ps() {\n", (void *)call->func);

- ret = trace_seq_printf(s, "%ps() {\n", (void *)call->func);
- if (!ret)
+ if (trace_seq_has_overflowed(s))
return TRACE_TYPE_PARTIAL_LINE;

/*
@@ -962,62 +861,43 @@ print_graph_entry_nested(struct trace_iterator *iter,
return TRACE_TYPE_NO_CONSUME;
}

-static enum print_line_t
+static void
print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
int type, unsigned long addr, u32 flags)
{
struct fgraph_data *data = iter->private;
struct trace_entry *ent = iter->ent;
int cpu = iter->cpu;
- int ret;

/* Pid */
- if (verif_pid(s, ent->pid, cpu, data) == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
+ verif_pid(s, ent->pid, cpu, data);

- if (type) {
+ if (type)
/* Interrupt */
- ret = print_graph_irq(iter, addr, type, cpu, ent->pid, flags);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ print_graph_irq(iter, addr, type, cpu, ent->pid, flags);

if (!(trace_flags & TRACE_ITER_CONTEXT_INFO))
- return 0;
+ return;

/* Absolute time */
- if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
- ret = print_graph_abs_time(iter->ts, s);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
+ print_graph_abs_time(iter->ts, s);

/* Cpu */
- if (flags & TRACE_GRAPH_PRINT_CPU) {
- ret = print_graph_cpu(s, cpu);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (flags & TRACE_GRAPH_PRINT_CPU)
+ print_graph_cpu(s, cpu);

/* Proc */
if (flags & TRACE_GRAPH_PRINT_PROC) {
- ret = print_graph_proc(s, ent->pid);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = trace_seq_puts(s, " | ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_proc(s, ent->pid);
+ trace_seq_puts(s, " | ");
}

/* Latency format */
- if (trace_flags & TRACE_ITER_LATENCY_FMT) {
- ret = print_graph_lat_fmt(s, ent);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (trace_flags & TRACE_ITER_LATENCY_FMT)
+ print_graph_lat_fmt(s, ent);

- return 0;
+ return;
}

/*
@@ -1135,8 +1015,7 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
if (check_irq_entry(iter, flags, call->func, call->depth))
return TRACE_TYPE_HANDLED;

- if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags))
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags);

leaf_ret = get_return_for_leaf(iter, field);
if (leaf_ret)
@@ -1169,7 +1048,6 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
pid_t pid = ent->pid;
int cpu = iter->cpu;
int func_match = 1;
- int ret;
int i;

if (check_irq_return(iter, flags, trace->depth))
@@ -1195,20 +1073,14 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
}
}

- if (print_graph_prologue(iter, s, 0, 0, flags))
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_prologue(iter, s, 0, 0, flags);

/* Overhead and duration */
- ret = print_graph_duration(duration, s, flags);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_duration(duration, s, flags);

/* Closing brace */
- for (i = 0; i < trace->depth * TRACE_GRAPH_INDENT; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ for (i = 0; i < trace->depth * TRACE_GRAPH_INDENT; i++)
+ trace_seq_putc(s, ' ');

/*
* If the return function does not have a matching entry,
@@ -1217,30 +1089,20 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
* belongs to, write out the function name. Always do
* that if the funcgraph-tail option is enabled.
*/
- if (func_match && !(flags & TRACE_GRAPH_PRINT_TAIL)) {
- ret = trace_seq_puts(s, "}\n");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- } else {
- ret = trace_seq_printf(s, "} /* %ps */\n", (void *)trace->func);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (func_match && !(flags & TRACE_GRAPH_PRINT_TAIL))
+ trace_seq_puts(s, "}\n");
+ else
+ trace_seq_printf(s, "} /* %ps */\n", (void *)trace->func);

/* Overrun */
- if (flags & TRACE_GRAPH_PRINT_OVERRUN) {
- ret = trace_seq_printf(s, " (Overruns: %lu)\n",
- trace->overrun);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (flags & TRACE_GRAPH_PRINT_OVERRUN)
+ trace_seq_printf(s, " (Overruns: %lu)\n",
+ trace->overrun);

- ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET,
- cpu, pid, flags);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_irq(iter, trace->func, TRACE_GRAPH_RET,
+ cpu, pid, flags);

- return TRACE_TYPE_HANDLED;
+ return trace_handle_return(s);
}

static enum print_line_t
@@ -1257,26 +1119,18 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
if (data)
depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth;

- if (print_graph_prologue(iter, s, 0, 0, flags))
- return TRACE_TYPE_PARTIAL_LINE;
+ print_graph_prologue(iter, s, 0, 0, flags);

/* No time */
- ret = print_graph_duration(0, s, flags | FLAGS_FILL_FULL);
- if (ret != TRACE_TYPE_HANDLED)
- return ret;
+ print_graph_duration(0, s, flags | FLAGS_FILL_FULL);

/* Indentation */
if (depth > 0)
- for (i = 0; i < (depth + 1) * TRACE_GRAPH_INDENT; i++) {
- ret = trace_seq_putc(s, ' ');
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ for (i = 0; i < (depth + 1) * TRACE_GRAPH_INDENT; i++)
+ trace_seq_putc(s, ' ');

/* The comment */
- ret = trace_seq_puts(s, "/* ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, "/* ");

switch (iter->ent->type) {
case TRACE_BPRINT:
@@ -1305,11 +1159,9 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
s->len--;
}

- ret = trace_seq_puts(s, " */\n");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ trace_seq_puts(s, " */\n");

- return TRACE_TYPE_HANDLED;
+ return trace_handle_return(s);
}


--
2.1.1


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