[patch 05/14] percpu: Use a Kconfig variable to configure arch specific percpu setup

Christoph Lameter
2007-11-27T00:15:58Z

[-- Attachment #1: arch_sets_up_per_cpu_areas --]
[-- Type: text/plain, Size: 4556 bytes --]

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>

---
arch/ia64/Kconfig | 4 ++++
arch/powerpc/Kconfig | 4 ++++
arch/sparc64/Kconfig | 4 ++++
arch/x86/Kconfig | 6 +++---
include/asm-generic/percpu.h | 1 -
include/asm-s390/percpu.h | 2 --
include/asm-x86/percpu_32.h | 2 --
init/main.c | 4 ++--
8 files changed, 17 insertions(+), 10 deletions(-)

Index: linux-2.6/init/main.c
===================================================================
--- linux-2.6.orig/init/main.c 2007-11-26 15:38:56.407111768 -0800
+++ linux-2.6/init/main.c 2007-11-26 15:40:10.425862722 -0800
@@ -363,7 +363,7 @@ static inline void smp_prepare_cpus(unsi

#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(v
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)
Index: linux-2.6/arch/ia64/Kconfig
===================================================================
--- linux-2.6.orig/arch/ia64/Kconfig 2007-11-26 15:38:56.415112360 -0800
+++ linux-2.6/arch/ia64/Kconfig 2007-11-26 15:40:10.425862722 -0800
@@ -75,6 +75,10 @@ config GENERIC_TIME_VSYSCALL
bool
default y

+config ARCH_SETS_UP_PER_CPU_AREA
+ bool
+ default y
+
config DMI
bool
default y
Index: linux-2.6/arch/powerpc/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/Kconfig 2007-11-26 15:38:56.427111914 -0800
+++ linux-2.6/arch/powerpc/Kconfig 2007-11-26 15:40:10.425862722 -0800
@@ -42,6 +42,10 @@ config GENERIC_HARDIRQS
bool
default y

+config ARCH_SETS_UP_PER_CPU_AREA
+ bool
+ default PPC64
+
config IRQ_PER_CPU
bool
default y
Index: linux-2.6/arch/sparc64/Kconfig
===================================================================
--- linux-2.6.orig/arch/sparc64/Kconfig 2007-11-26 15:38:56.447111936 -0800
+++ linux-2.6/arch/sparc64/Kconfig 2007-11-26 15:40:10.425862722 -0800
@@ -66,6 +66,10 @@ config AUDIT_ARCH
bool
default y

+config ARCH_SETS_UP_PER_CPU_AREA
+ bool
+ default y
+
config ARCH_NO_VIRT_TO_BUS
def_bool y

Index: linux-2.6/arch/x86/Kconfig
===================================================================
--- linux-2.6.orig/arch/x86/Kconfig 2007-11-26 15:38:58.234361975 -0800
+++ linux-2.6/arch/x86/Kconfig 2007-11-26 15:40:52.465611449 -0800
@@ -112,9 +112,9 @@ config GENERIC_TIME_VSYSCALL
bool
default X86_64

-
-
-
+config ARCH_SETS_UP_PER_CPU_AREA
+ bool
+ default X86_64

config ZONE_DMA32
bool
Index: linux-2.6/include/asm-generic/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-generic/percpu.h 2007-11-26 15:40:04.469611815 -0800
+++ linux-2.6/include/asm-generic/percpu.h 2007-11-26 15:40:10.437861790 -0800
@@ -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];
Index: linux-2.6/include/asm-x86/percpu_32.h
===================================================================
--- linux-2.6.orig/include/asm-x86/percpu_32.h 2007-11-26 15:40:04.469611815 -0800
+++ linux-2.6/include/asm-x86/percpu_32.h 2007-11-26 15:40:10.441861845 -0800
@@ -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[];
Index: linux-2.6/include/asm-s390/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-s390/percpu.h 2007-11-26 15:40:04.469611815 -0800
+++ linux-2.6/include/asm-s390/percpu.h 2007-11-26 15:40:10.441861845 -0800
@@ -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.

--