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>
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 4a81b7f..5a41e75 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -80,6 +80,9 @@
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 c17a194..fb85f6b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,6 +42,9 @@
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 1e25bce..26f5791 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -66,6 +66,9 @@
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 1de28e8..dc80a9f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -97,6 +97,9 @@
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 d85172e..b5e53b9 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 545857e..f94d0d3 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 a7ebd43..3949586 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 f287ca5..3f8aba2 100644
--- a/init/main.c
+++ b/init/main.c
@@ -363,7 +363,7 @@
#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 @@
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)
