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tracing: use newline separator for trace options list

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Impact: clean up

Instead of listing the trace options like:

 # cat /debug/tracing/trace_options
print-parent nosym-offset nosym-addr noverbose noraw nohex nobin noblock nostacktrace nosched-tree ftrace_printk noftrace_preempt nobranch annotate nouserstacktrace nosym-userobj

We now list them like:

 # cat /debug/tracing/trace_options
print-parent
nosym-offset
nosym-addr
noverbose
noraw
nohex
nobin
noblock
nostacktrace
nosched-tree
ftrace_printk
noftrace_preempt
nobranch
annotate
nouserstacktrace
nosym-userobj

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt 2009-02-27 00:22:21 -05:00
parent 85a2f9b46f
commit 5c6a3ae1b4
1 changed files with 6 additions and 7 deletions
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13
kernel/trace/trace.c
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@ -2037,7 +2037,7 @@ tracing_trace_options_read(struct file *filp, char __user *ubuf,
/* calculate max size */
for (i = 0; trace_options[i]; i++) {
len += strlen(trace_options[i]);
len += 3; /* "no" and space */
len += 3; /* "no" and newline */
}
mutex_lock(&trace_types_lock);
@ -2050,7 +2050,7 @@ tracing_trace_options_read(struct file *filp, char __user *ubuf,
*/
for (i = 0; trace_opts[i].name; i++) {
len += strlen(trace_opts[i].name);
len += 3; /* "no" and space */
len += 3; /* "no" and newline */
}
/* +2 for \n and \0 */
@ -2062,22 +2062,21 @@ tracing_trace_options_read(struct file *filp, char __user *ubuf,
for (i = 0; trace_options[i]; i++) {
if (trace_flags & (1 << i))
r += sprintf(buf + r, "%s ", trace_options[i]);
r += sprintf(buf + r, "%s\n", trace_options[i]);
else
r += sprintf(buf + r, "no%s ", trace_options[i]);
r += sprintf(buf + r, "no%s\n", trace_options[i]);
}
for (i = 0; trace_opts[i].name; i++) {
if (tracer_flags & trace_opts[i].bit)
r += sprintf(buf + r, "%s ",
r += sprintf(buf + r, "%s\n",
trace_opts[i].name);
else
r += sprintf(buf + r, "no%s ",
r += sprintf(buf + r, "no%s\n",
trace_opts[i].name);
}
mutex_unlock(&trace_types_lock);
r += sprintf(buf + r, "\n");
WARN_ON(r >= len + 2);
r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r);