From 3e09f95b40d2f0fe4ea8bf59aba6406274b0dfcd Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Mon, 11 Sep 2023 20:30:52 +0200
Subject: [PATCH] tag/Pool: enable option `zero_initialized`

Commit 44beae519d1966ebf96d53f858f4ea15932d0849 caused the MPD
executable to grow by more than 1 MB because the `slots` array
suddenly was not zero-initialized anymore, because the doubly-linked
list is circular, while the singly-linked list is zero-terminated.

This option moves the array back to the `bss` section.
---
 src/tag/Pool.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tag/Pool.cxx b/src/tag/Pool.cxx
index 006b1c35a..4fbdb43b4 100644
--- a/src/tag/Pool.cxx
+++ b/src/tag/Pool.cxx
@@ -46,7 +46,8 @@ TagPoolSlot::Create(TagType type,
 }
 
 static std::array<IntrusiveList<TagPoolSlot,
-				IntrusiveListMemberHookTraits<&TagPoolSlot::list_hook>>,
+				IntrusiveListMemberHookTraits<&TagPoolSlot::list_hook>,
+				IntrusiveListOptions{.zero_initialized = true}>,
 		  16127> slots;
 
 static inline unsigned