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authortravis@sgi.com <travis@sgi.com>2008-01-30 13:32:51 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:51 +0100
commitb32ef636a59aad12f9f9b5dc34c93222842c58ba (patch)
tree6857cac9a741be756608793ab1b481bfa32d2c2e
parentcf8fa920cb4271f17e0265c863d64bea1b31941a (diff)
downloadlinux-b32ef636a59aad12f9f9b5dc34c93222842c58ba.tar.bz2
percpu: use a kconfig variable to signal arch specific percpu setup
The use of the __GENERIC_PERCPU is a bit problematic since arches may want to run their own percpu setup while using the generic percpu definitions. Replace it through a kconfig variable. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/ia64/Kconfig3
-rw-r--r--arch/powerpc/Kconfig3
-rw-r--r--arch/sparc64/Kconfig3
-rw-r--r--arch/x86/Kconfig3
-rw-r--r--include/asm-generic/percpu.h1
-rw-r--r--include/asm-s390/percpu.h2
-rw-r--r--include/asm-x86/percpu_32.h2
-rw-r--r--init/main.c4
8 files changed, 14 insertions, 7 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 4a81b7fb191a..5a41e75ae1fe 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -80,6 +80,9 @@ config GENERIC_TIME_VSYSCALL
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool y
+
config DMI
bool
default y
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c17a194beb0e..fb85f6b72fcf 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,6 +42,9 @@ config GENERIC_HARDIRQS
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool PPC64
+
config IRQ_PER_CPU
bool
default y
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 1e25bce0366d..26f5791baa33 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -66,6 +66,9 @@ config AUDIT_ARCH
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool y
+
config ARCH_NO_VIRT_TO_BUS
def_bool y
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1de28e850aa4..dc80a9f1f303 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -97,6 +97,9 @@ config GENERIC_TIME_VSYSCALL
bool
default X86_64
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool X86_64
+
config ARCH_SUPPORTS_OPROFILE
bool
default y
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index d85172e9ed45..b5e53b9ab1f7 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -3,7 +3,6 @@
#include <linux/compiler.h>
#include <linux/threads.h>
-#define __GENERIC_PER_CPU
#ifdef CONFIG_SMP
extern unsigned long __per_cpu_offset[NR_CPUS];
diff --git a/include/asm-s390/percpu.h b/include/asm-s390/percpu.h
index 545857e64443..f94d0d3cdb2f 100644
--- a/include/asm-s390/percpu.h
+++ b/include/asm-s390/percpu.h
@@ -4,8 +4,6 @@
#include <linux/compiler.h>
#include <asm/lowcore.h>
-#define __GENERIC_PER_CPU
-
/*
* s390 uses its own implementation for per cpu data, the offset of
* the cpu local data area is cached in the cpu's lowcore memory.
diff --git a/include/asm-x86/percpu_32.h b/include/asm-x86/percpu_32.h
index a7ebd436f3cc..3949586bf94e 100644
--- a/include/asm-x86/percpu_32.h
+++ b/include/asm-x86/percpu_32.h
@@ -41,8 +41,6 @@
* PER_CPU(cpu_gdt_descr, %ebx)
*/
#ifdef CONFIG_SMP
-/* Same as generic implementation except for optimized local access. */
-#define __GENERIC_PER_CPU
/* This is used for other cpus to find our section. */
extern unsigned long __per_cpu_offset[];
diff --git a/init/main.c b/init/main.c
index f287ca5862b9..3f8aba291ed3 100644
--- a/init/main.c
+++ b/init/main.c
@@ -363,7 +363,7 @@ static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#else
-#ifdef __GENERIC_PER_CPU
+#ifndef CONFIG_ARCH_SETS_UP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
@@ -384,7 +384,7 @@ static void __init setup_per_cpu_areas(void)
ptr += size;
}
}
-#endif /* !__GENERIC_PER_CPU */
+#endif /* CONFIG_ARCH_SETS_UP_CPU_AREA */
/* Called by boot processor to activate the rest. */
static void __init smp_init(void)