trace: Replace single-character seq_puts with seq_putc

Printing a single character to a seqfile might as well be done with
seq_putc instead of seq_puts; this avoids a strlen() call and a memory
access. It also shaves another few bytes off the generated code.

Link: http://lkml.kernel.org/r/1415479332-25944-4-git-send-email-linux@rasmusvillemoes.dk

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace_events_trigger.c

@@ -383,7 +383,7 @@ event_trigger_print(const char *name, struct seq_file *m,
 	if (filter_str)
 		seq_printf(m, " if %s\n", filter_str);
 	else
-		seq_puts(m, "\n");
+		seq_putc(m, '\n');
 
 	return 0;
 }
@@ -1105,7 +1105,7 @@ event_enable_trigger_print(struct seq_file *m, struct event_trigger_ops *ops,
 	if (data->filter_str)
 		seq_printf(m, " if %s\n", data->filter_str);
 	else
-		seq_puts(m, "\n");
+		seq_putc(m, '\n');
 
 	return 0;
 }

kernel/trace/trace_functions_graph.c

@@ -1407,7 +1407,7 @@ static void __print_graph_headers_flags(struct seq_file *s, u32 flags)
 		print_lat_header(s, flags);
 
 	/* 1st line */
-	seq_puts(s, "#");
+	seq_putc(s, '#');
 	if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
 		seq_puts(s, "     TIME       ");
 	if (flags & TRACE_GRAPH_PRINT_CPU)
@@ -1421,7 +1421,7 @@ static void __print_graph_headers_flags(struct seq_file *s, u32 flags)
 	seq_puts(s, "               FUNCTION CALLS\n");
 
 	/* 2nd line */
-	seq_puts(s, "#");
+	seq_putc(s, '#');
 	if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
 		seq_puts(s, "      |         ");
 	if (flags & TRACE_GRAPH_PRINT_CPU)

kernel/trace/trace_kprobe.c

@@ -1030,7 +1030,7 @@ print_kprobe_event(struct trace_iterator *iter, int flags,
 	if (!seq_print_ip_sym(s, field->ip, flags | TRACE_ITER_SYM_OFFSET))
 		goto partial;
 
-	if (!trace_seq_puts(s, ")"))
+	if (!trace_seq_putc(s, ')'))
 		goto partial;
 
 	data = (u8 *)&field[1];
@@ -1039,7 +1039,7 @@ print_kprobe_event(struct trace_iterator *iter, int flags,
 					     data + tp->args[i].offset, field))
 			goto partial;
 
-	if (!trace_seq_puts(s, "\n"))
+	if (!trace_seq_putc(s, '\n'))
 		goto partial;
 
 	return TRACE_TYPE_HANDLED;
@@ -1072,7 +1072,7 @@ print_kretprobe_event(struct trace_iterator *iter, int flags,
 	if (!seq_print_ip_sym(s, field->func, flags & ~TRACE_ITER_SYM_OFFSET))
 		goto partial;
 
-	if (!trace_seq_puts(s, ")"))
+	if (!trace_seq_putc(s, ')'))
 		goto partial;
 
 	data = (u8 *)&field[1];
@@ -1081,7 +1081,7 @@ print_kretprobe_event(struct trace_iterator *iter, int flags,
 					     data + tp->args[i].offset, field))
 			goto partial;
 
-	if (!trace_seq_puts(s, "\n"))
+	if (!trace_seq_putc(s, '\n'))
 		goto partial;
 
 	return TRACE_TYPE_HANDLED;

kernel/trace/trace_printk.c

@@ -305,7 +305,7 @@ static int t_show(struct seq_file *m, void *v)
 			seq_puts(m, "\\t");
 			break;
 		case '\\':
-			seq_puts(m, "\\");
+			seq_putc(m, '\\');
 			break;
 		case '"':
 			seq_puts(m, "\\\"");

kernel/trace/trace_uprobe.c

@@ -872,7 +872,7 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e
 			goto partial;
 	}
 
-	if (trace_seq_puts(s, "\n"))
+	if (trace_seq_putc(s, '\n'))
 		return TRACE_TYPE_HANDLED;
 
 partial: