mm,x86,um: move CMPXCHG_LOCAL config option

Move CMPXCHG_LOCAL and rename it to HAVE_CMPXCHG_LOCAL 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>
mariux64 · Jan 13, 2012 · 4156153 · 4156153
1 parent 43570fd
commit 4156153
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Showing 5 changed files with 5 additions and 8 deletions.
diff --git a/arch/Kconfig b/arch/Kconfig
@@ -193,4 +193,7 @@ config HAVE_ALIGNED_STRUCT_PAGE
 	  on a struct page for better performance. However selecting this
 	  might increase the size of a struct page by a word.
 
+config HAVE_CMPXCHG_LOCAL
+	bool
+
 source "kernel/gcov/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
@@ -61,6 +61,7 @@ config X86
 	select HAVE_PERF_EVENTS_NMI
 	select ANON_INODES
 	select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
+	select HAVE_CMPXCHG_LOCAL if !M386
 	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
@@ -309,9 +309,6 @@ config X86_INTERNODE_CACHE_SHIFT
 config X86_CMPXCHG
 	def_bool X86_64 || (X86_32 && !M386)
 
-config CMPXCHG_LOCAL
-	def_bool X86_64 || (X86_32 && !M386)
-
 config CMPXCHG_DOUBLE
 	def_bool y
 

diff --git 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_LOCAL
-	bool
-	default n
-
 config CMPXCHG_DOUBLE
 	bool
 	default n

diff --git a/mm/vmstat.c b/mm/vmstat.c
@@ -295,7 +295,7 @@ void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
 }
 EXPORT_SYMBOL(__dec_zone_page_state);
 
-#ifdef CONFIG_CMPXCHG_LOCAL
+#ifdef CONFIG_HAVE_CMPXCHG_LOCAL
 /*
  * If we have cmpxchg_local support then we do not need to incur the overhead
  * that comes with local_irq_save/restore if we use this_cpu_cmpxchg.