From b32ef636a59aad12f9f9b5dc34c93222842c58ba Mon Sep 17 00:00:00 2001 From: "travis@sgi.com" Date: Wed, 30 Jan 2008 13:32:51 +0100 Subject: [PATCH] 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 Cc: Andi Kleen Signed-off-by: Christoph Lameter Signed-off-by: Mike Travis Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/ia64/Kconfig | 3 +++ arch/powerpc/Kconfig | 3 +++ arch/sparc64/Kconfig | 3 +++ arch/x86/Kconfig | 3 +++ 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, 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 #include -#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 #include -#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) -- 2.20.1