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

From: Thadeu Lima de Souza Cascardo
Date: Sat Jul 23 2011 - 12:22:22 EST

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@xxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
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
default n

+ bool
+ default n
source "arch/x86/Kconfig.cpu"


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