[PATCH] ring-buffer: Correct the grammatical errors in the comments

[liujing]

The word "trace" begins with a consonant sound,
so "a" should be used instead of "an".

Signed-off-by: liujing <liuj...@cmss.chinamobile.com>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 77dc0b25140e..8825ae8d7664 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -4010,7 +4010,7 @@ static const char *show_irq_str(int bits)
        return type[bits];
 }
 
-/* Assume this is an trace event */
+/* Assume this is a trace event */
 static const char *show_flags(struct ring_buffer_event *event)
 {
        struct trace_entry *entry;
-- 
2.27.0