linux-kernel - Re: linux-next: Tree for July 22 (uml)

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Date:	Fri, 22 Jul 2011 20:55:34 +0200
From:	Richard Weinberger <richard@....at>
To:	JBeulich@...ell.com
Cc:	Randy Dunlap <rdunlap@...otime.net>, mingo@...e.hu,
	akpm@...ux-foundation.org, Stephen Rothwell <sfr@...b.auug.org.au>,
	LKML <linux-kernel@...r.kernel.org>,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: linux-next: Tree for July 22 (uml)

Am Freitag 22 Juli 2011, 17:53:46 schrieben Sie:
> On Fri, 22 Jul 2011 16:42:37 +1000 Stephen Rothwell wrote:
> > Hi all,
> 
> uml build on i386 fails with:
> 
> arch/um/sys-i386/built-in.o: In function `call_rwsem_down_read_failed':
> linux-next-20110722/arch/um/sys-i386/../../x86/lib/rwsem.S:93: undefined
> reference to `rwsem_down_read_failed' arch/um/sys-i386/built-in.o: In
> function `call_rwsem_down_write_failed':
> linux-next-20110722/arch/um/sys-i386/../../x86/lib/rwsem.S:105: undefined
> reference to `rwsem_down_write_failed' arch/um/sys-i386/built-in.o: In
> function `call_rwsem_wake':
> linux-next-20110722/arch/um/sys-i386/../../x86/lib/rwsem.S:118: undefined
> reference to `rwsem_wake' arch/um/sys-i386/built-in.o: In function
> `call_rwsem_downgrade_wake':
> linux-next-20110722/arch/um/sys-i386/../../x86/lib/rwsem.S:130: undefined
> reference to `rwsem_downgrade_wake'
> 

Jan,

"x86: Unify rwsem assembly implementation" broke the UML build on i386.
Please compile test you changes or CC me when you are touch something in arch/um/.

make ARCH=um SUBARCH=i386
and
make ARCH=um SUBARCH=x86_64

does not hurt. :-)

Thanks,
//richard

---

>From b9ec24beb55276d74fdf4f9f9607c69fc8662b72 Mon Sep 17 00:00:00 2001
From: Richard Weinberger <richard@....at>
Date: Fri, 22 Jul 2011 20:46:32 +0200
Subject: [PATCH] um: Make rwsem.S depend on CONFIG_RWSEM_XCHGADD_ALGORITHM

rwsem.S can only be used with CONFIG_RWSEM_XCHGADD_ALGORITHM.
This unbreaks the UML build on i386.

Signed-off-by: Richard Weinberger <richard@....at>
Reported-by: Randy Dunlap <rdunlap@...otime.net>
---
 arch/um/sys-i386/Makefile |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 15587ed..87b659d 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -8,7 +8,8 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
 
 obj-$(CONFIG_BINFMT_ELF) += elfcore.o
 
-subarch-obj-y = lib/rwsem.o lib/string_32.o
+subarch-obj-y = lib/string_32.o
+subarch-obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += lib/rwsem.o
 subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o
 subarch-obj-$(CONFIG_MODULES) += kernel/module.o
 
-- 
1.7.6

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