mm,x86,um: move CMPXCHG_DOUBLE config option

Move CMPXCHG_DOUBLE and rename it to HAVE_CMPXCHG_DOUBLE so architectures
can simply select the option if it is supported.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 4 insertions, 7 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 22182a8cc62c..4f55c736be11 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -196,4 +196,7 @@ config HAVE_ALIGNED_STRUCT_PAGE
 config HAVE_CMPXCHG_LOCAL
         bool
 
+config HAVE_CMPXCHG_DOUBLE
+        bool
+
 source "kernel/gcov/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 59717fd17bc7..6c14ecd851d0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -62,6 +62,7 @@ config X86
         select ANON_INODES
         select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
         select HAVE_CMPXCHG_LOCAL if !M386
+        select HAVE_CMPXCHG_DOUBLE
         select HAVE_ARCH_KMEMCHECK
         select HAVE_USER_RETURN_NOTIFIER
         select ARCH_BINFMT_ELF_RANDOMIZE_PIE
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 99d2ab8b7795..3c57033e2211 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -309,9 +309,6 @@ config X86_INTERNODE_CACHE_SHIFT
 config X86_CMPXCHG
         def_bool X86_64 || (X86_32 && !M386)
 
-config CMPXCHG_DOUBLE
-        def_bool y
-
 config X86_L1_CACHE_SHIFT
         int
         default "7" if MPENTIUM4 || MPSC
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a62bfc66239e..b2b54d2edf53 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -6,10 +6,6 @@ menu "UML-specific options"
 
 menu "Host processor type and features"
 
-config CMPXCHG_DOUBLE
-        bool
-        default n
-
 source "arch/x86/Kconfig.cpu"
 
 endmenu