From 513f0446486318bc5118f719834c5960ee2a1f8e Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Sun, 19 Nov 2017 08:52:56 +0000
Subject: [PATCH] [PATCH 1/1] Porting OpenBSD internal changes.

Porting to the 88k architecture the locking mechanism.
---
 src/backend/storage/lmgr/s_lock.c |  2 +-
 src/include/storage/s_lock.h      | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/backend/storage/lmgr/s_lock.c b/src/backend/storage/lmgr/s_lock.c
index 40d8156331..b3e2e34e7e 100644
--- a/src/backend/storage/lmgr/s_lock.c
+++ b/src/backend/storage/lmgr/s_lock.c
@@ -251,7 +251,7 @@ static void
 tas_dummy()
 {
 	__asm__ __volatile__(
-#if defined(__NetBSD__) && defined(__ELF__)
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(__ELF__)
 /* no underscore for label and % for registers */
 						 "\
 .global		tas 				\n\
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index 99e109853f..c5ca66b9ec 100644
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -693,6 +693,29 @@ typedef unsigned char slock_t;
 	do { __asm__ __volatile__("" : : : "memory");  *(lock) = 0; } while (0)
 #endif
 
+#if defined(__m88k__)				/* Motorola 88k */
+#define	HAS_TEST_AND_SET
+
+typedef unsigned int slock_t;
+
+#define	TAS(lock) tas(lock)
+
+static __inline__ int
+tas(volatile slock_t *lock)
+{
+	register slock_t _res = 1;
+
+	__asm__ __volatile__(
+		"	xmem	%0, %2, %%r0\n",
+		"=r"(_res)
+		"0" (_res), "r"(lock)
+		"memory");
+	return (int) _res;
+}
+
+#endif	/* __m88k__ */
+
+
 #endif	/* defined(__GNUC__) || defined(__INTEL_COMPILER) */
 
 
-- 
2.15.0