From dbdb2172a0940cc18985a0c2b20cdb002fdf8466 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Mon, 1 Oct 2012 10:14:35 -0400
Subject: [PATCH] Add C comment that IsBackendPid() is called by external
 modules, so we don't accidentally remove it.

---
 src/backend/storage/ipc/procarray.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c
index 984c2861cc6..d38164caa73 100644
--- a/src/backend/storage/ipc/procarray.c
+++ b/src/backend/storage/ipc/procarray.c
@@ -1929,6 +1929,8 @@ BackendXidGetPid(TransactionId xid)
 
 /*
  * IsBackendPid -- is a given pid a running backend
+ *
+ * This is not called by the backend, but is called by external modules.
  */
 bool
 IsBackendPid(int pid)
-- 
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