1 files changed, 22 insertions, 33 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 45068269ebb..874f2893cff 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -129,7 +129,7 @@ static int tracing_set_tracer(const char *buf);
 static char bootup_tracer_buf[MAX_TRACER_SIZE] __initdata;
 static char *default_bootup_tracer;
 
-static int __init set_ftrace(char *str)
+static int __init set_cmdline_ftrace(char *str)
 {
 	strncpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
 	default_bootup_tracer = bootup_tracer_buf;
@@ -137,7 +137,7 @@ static int __init set_ftrace(char *str)
 	ring_buffer_expanded = 1;
 	return 1;
 }
-__setup("ftrace=", set_ftrace);
+__setup("ftrace=", set_cmdline_ftrace);
 
 static int __init set_ftrace_dump_on_oops(char *str)
 {
@@ -1361,10 +1361,11 @@ int trace_array_vprintk(struct trace_array *tr,
 	pause_graph_tracing();
 	raw_local_irq_save(irq_flags);
 	__raw_spin_lock(&trace_buf_lock);
-	len = vsnprintf(trace_buf, TRACE_BUF_SIZE, fmt, args);
-
-	len = min(len, TRACE_BUF_SIZE-1);
-	trace_buf[len] = 0;
+	if (args == NULL) {
+		strncpy(trace_buf, fmt, TRACE_BUF_SIZE);
+		len = strlen(trace_buf);
+	} else
+		len = vsnprintf(trace_buf, TRACE_BUF_SIZE, fmt, args);
 
 	size = sizeof(*entry) + len + 1;
 	buffer = tr->buffer;
@@ -1373,10 +1374,10 @@ int trace_array_vprintk(struct trace_array *tr,
 	if (!event)
 		goto out_unlock;
 	entry = ring_buffer_event_data(event);
-	entry->ip			= ip;
+	entry->ip = ip;
 
 	memcpy(&entry->buf, trace_buf, len);
-	entry->buf[len] = 0;
+	entry->buf[len] = '\0';
 	if (!filter_check_discard(call, entry, buffer, event))
 		ring_buffer_unlock_commit(buffer, event);
 
@@ -1393,7 +1394,7 @@ int trace_array_vprintk(struct trace_array *tr,
 
 int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
 {
-	return trace_array_printk(&global_trace, ip, fmt, args);
+	return trace_array_vprintk(&global_trace, ip, fmt, args);
 }
 EXPORT_SYMBOL_GPL(trace_vprintk);
 
@@ -2440,7 +2441,7 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
 			return ret;
 	}
 
-	filp->f_pos += cnt;
+	*ppos += cnt;
 
 	return cnt;
 }
@@ -2582,7 +2583,7 @@ tracing_ctrl_write(struct file *filp, const char __user *ubuf,
 	}
 	mutex_unlock(&trace_types_lock);
 
-	filp->f_pos += cnt;
+	*ppos += cnt;
 
 	return cnt;
 }
@@ -2764,7 +2765,7 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
 	if (err)
 		return err;
 
-	filp->f_pos += ret;
+	*ppos += ret;
 
 	return ret;
 }
@@ -3299,7 +3300,7 @@ tracing_entries_write(struct file *filp, const char __user *ubuf,
 		}
 	}
 
-	filp->f_pos += cnt;
+	*ppos += cnt;
 
 	/* If check pages failed, return ENOMEM */
 	if (tracing_disabled)
@@ -3319,22 +3320,11 @@ tracing_entries_write(struct file *filp, const char __user *ubuf,
 	return cnt;
 }
 
-static int mark_printk(const char *fmt, ...)
-{
-	int ret;
-	va_list args;
-	va_start(args, fmt);
-	ret = trace_vprintk(0, fmt, args);
-	va_end(args);
-	return ret;
-}
-
 static ssize_t
 tracing_mark_write(struct file *filp, const char __user *ubuf,
 					size_t cnt, loff_t *fpos)
 {
 	char *buf;
-	char *end;
 
 	if (tracing_disabled)
 		return -EINVAL;
@@ -3342,7 +3332,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
 	if (cnt > TRACE_BUF_SIZE)
 		cnt = TRACE_BUF_SIZE;
 
-	buf = kmalloc(cnt + 1, GFP_KERNEL);
+	buf = kmalloc(cnt + 2, GFP_KERNEL);
 	if (buf == NULL)
 		return -ENOMEM;
 
@@ -3350,14 +3340,13 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
 		kfree(buf);
 		return -EFAULT;
 	}
+	if (buf[cnt-1] != '\n') {
+		buf[cnt] = '\n';
+		buf[cnt+1] = '\0';
+	} else
+		buf[cnt] = '\0';
 
-	/* Cut from the first nil or newline. */
-	buf[cnt] = '\0';
-	end = strchr(buf, '\n');
-	if (end)
-		*end = '\0';
-
-	cnt = mark_printk("%s\n", buf);
+	cnt = trace_vprintk(0, buf, NULL);
 	kfree(buf);
 	*fpos += cnt;
 
@@ -3730,7 +3719,7 @@ tracing_stats_read(struct file *filp, char __user *ubuf,
 
 	s = kmalloc(sizeof(*s), GFP_KERNEL);
 	if (!s)
-		return ENOMEM;
+		return -ENOMEM;
 
 	trace_seq_init(s);