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[Maiyun Zhang]

>From 625b42a0d9f4157c59d90e25eaa56d9bf8b5090a Mon Sep 17 00:00:00 2001
From: Zhang Maiyun <me at maiyun.me>
Date: Wed, 1 May 2024 12:37:16 -0700
Subject: [PATCH] BFD: remove unused spinlock

The only use of the spinlock in `struct bfd_proto` was removed in 38acb415f
and now it should be fine to remove it.

The check for `pthread_spin*` in `aclocal.m4` is also removed
accordingly. This makes it possible to port BFD support to platforms
without spinlocks (e.g. Darwin)

Signed-off-by: Zhang Maiyun <me at maiyun.me>
---
 aclocal.m4      | 4 ++--
 proto/bfd/bfd.h | 2 --
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/aclocal.m4 b/aclocal.m4
index dd5cca35..7fc9c995 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -91,8 +91,8 @@ AC_DEFUN([BIRD_CHECK_PTHREADS],
 	    [
 	      pthread_t pt;
 	      pthread_create(&pt, NULL, NULL, NULL);
-	      pthread_spinlock_t lock;
-	      pthread_spin_lock(&lock);
+	      pthread_mutex_t lock;
+	      pthread_mutex_lock(&lock);
 	    ]
 	  )
 	],
diff --git a/proto/bfd/bfd.h b/proto/bfd/bfd.h
index 71f1090d..d8b5f8ea 100644
--- a/proto/bfd/bfd.h
+++ b/proto/bfd/bfd.h
@@ -82,8 +82,6 @@ struct bfd_proto
 {
   struct proto p;
 
-  pthread_spinlock_t lock;
-
   pool *tpool;
 
   struct birdloop *eloop;
-- 
2.50.1 (Apple Git-155)