From 73293ebae2e48782804029211622d16ed39952ae Mon Sep 17 00:00:00 2001
From: Tatsuo Ishii <ishii@postgresql.org>
Date: Tue, 24 Jan 2017 09:39:11 +0900
Subject: [PATCH] Fix comments in StrategyNotifyBgWriter().

The interface for the function was changed in
d72731a70450b5e7084991b9caa15cb58a2820df but the comments of the
function was not updated.

Patch by Yugo Nagata.
---
 src/backend/storage/buffer/freelist.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/storage/buffer/freelist.c b/src/backend/storage/buffer/freelist.c
index b68ab2082e8..5d0a636ba8c 100644
--- a/src/backend/storage/buffer/freelist.c
+++ b/src/backend/storage/buffer/freelist.c
@@ -406,8 +406,8 @@ StrategySyncStart(uint32 *complete_passes, uint32 *num_buf_alloc)
 /*
  * StrategyNotifyBgWriter -- set or clear allocation notification latch
  *
- * If bgwriterLatch isn't NULL, the next invocation of StrategyGetBuffer will
- * set that latch.  Pass NULL to clear the pending notification before it
+ * If bgwprocno isn't -1, the next invocation of StrategyGetBuffer will
+ * set that latch.  Pass -1 to clear the pending notification before it
  * happens.  This feature is used by the bgwriter process to wake itself up
  * from hibernation, and is not meant for anybody else to use.
  */
-- 
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