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Linux/mips compile: [Fwd: Bug#139003: a little bit more isneeded...]

From: Oliver Elphick <olly(at)lfix(dot)co(dot)uk>
To: pgsql-hackers(at)postgresql(dot)org
Cc: rmurray(at)debian(dot)org
Subject: Linux/mips compile: [Fwd: Bug#139003: a little bit more isneeded...]
Date: 2002-03-27 09:46:04
Message-ID: 1017222365.1228.274.camel@linda (view raw or flat)
Thread:
Lists: pgsql-hackers
-----Forwarded Message-----

From: rmurray(at)debian(dot)org
To: 139003(at)bugs(dot)debian(dot)org
Cc: control(at)bugs(dot)debian(dot)org
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\


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