Subject: [HACKERS] Linux/mips compile: [Fwd: Bug#139003: a little bit more is needed...]
From: Oliver Elphick <[email-masked]>
To: [email-masked]
Cc: [email-masked]
Date: 27 Mar 2002 09:46:04 +0000

-----Forwarded Message-----

From: [email-masked]
To: [email-masked]
Cc: [email-masked]
Subject: Bug#139003: a little bit more is needed...
Date: 27 Mar 2002 00:21:18 -0800

reopen 139003
thanks

Looks like a small patch is needed as well to do the right thing on Linux.

The patch enables the mips2 ISA for the ll/sc operations, and then restores
it when done.  The kernel/libc emulation code will take over on CPUs without
ll/sc, and on CPUs with it, it'll use the operations provided by the CPU.

Combined with the earlier fix (removing -mips2), postgresql builds again on
mips and mipsel.  The patch is against 7.2-7.

diff -urN postgresql-7.2/src/backend/storage/lmgr/s_lock.c postgresql-7.2.fixed/src/backend/storage/lmgr/s_lock.c
--- postgresql-7.2/src/backend/storage/lmgr/s_lock.c	Mon Nov  5 18:46:28 2001
+++ postgresql-7.2.fixed/src/backend/storage/lmgr/s_lock.c	Wed Mar 27 07:46:59 2002
@@ -173,9 +173,12 @@
 .global	tas						\n\
 tas:							\n\
 			.frame	$sp, 0, $31	\n\
+			.set push		\n\
+			.set mips2		\n\n
 			ll		$14, 0($4)	\n\
 			or		$15, $14, 1	\n\
 			sc		$15, 0($4)	\n\
+			.set pop			\n\
 			beq		$15, 0, fail\n\
 			bne		$14, 0, fail\n\
 			li		$2, 0		\n\