[PATCH] um: disable CMPXCHG_DOUBLE as it breaks UML build

[PATCH] um: disable CMPXCHG_DOUBLE as it breaks UML build

[Thadeu Lima de Souza Cascardo]

Commit b789ef518b2a7231b0668c813f677cee528a9d3f tests for cmpxchg_double
support in the SLUB code and it breaks UML builds with SLUB. Since UML
does not support checking for CPU features, disable CMPXCHG_DOUBLE just
like CMPXCHG_LOCAL is disabled for UML.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
---
 arch/um/Kconfig.x86 |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/um/Kconfig.x86 b/arch/um/Kconfig.x86
index d31ecf3..21bebe6 100644
--- a/arch/um/Kconfig.x86
+++ b/arch/um/Kconfig.x86
@@ -10,6 +10,10 @@ config CMPXCHG_LOCAL
 	bool
 	default n
 
+config CMPXCHG_DOUBLE
+	bool
+	default n
+
 source "arch/x86/Kconfig.cpu"
 
 endmenu
-- 
1.7.5.4

Re: [PATCH] um: disable CMPXCHG_DOUBLE as it breaks UML build

[Christoph Lameter]

Acked-by: Christoph Lameter <cl@linux.com>

Re: [uml-devel] [PATCH] um: disable CMPXCHG_DOUBLE as it breaks UML build

[Richard Weinberger]

Am Samstag 23 Juli 2011, 18:21:51 schrieb Thadeu Lima de Souza Cascardo:
> Commit b789ef518b2a7231b0668c813f677cee528a9d3f tests for cmpxchg_double
> support in the SLUB code and it breaks UML builds with SLUB. Since UML
> does not support checking for CPU features, disable CMPXCHG_DOUBLE just
> like CMPXCHG_LOCAL is disabled for UML.
> 
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: Jeff Dike <jdike@addtoit.com>
> Cc: Richard Weinberger <richard@nod.at>

Applied!

Thanks,
//richard

------------------------------------------------------------------------------
Storage Efficiency Calculator
This modeling tool is based on patent-pending intellectual property that
has been used successfully in hundreds of IBM storage optimization engage-
ments, worldwide.  Store less, Store more with what you own, Move data to 
the right place. Try It Now! http://www.accelacomm.com/jaw/sfnl/114/51427378/
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel