Currently we have NR_CPUS, which is 1 on UP, and CONFIG_NR_CPUS on SMP. If we make CONFIG_NR_CPUS always valid (and always 1 on !SMP), we can skip the middleman. This also allows us to find and check all the remaining NR_CPUS users. From: Rusty Russell Signed-off-by: Rusty Russell Signed-off-by: Mike Travis --- arch/alpha/Kconfig | 10 +++++----- arch/arm/Kconfig | 6 +++--- arch/ia64/Kconfig | 8 ++++---- arch/m32r/Kconfig | 8 ++++---- arch/mips/Kconfig | 4 ++-- arch/parisc/Kconfig | 8 ++++---- arch/s390/Kconfig | 10 +++++----- arch/sh/Kconfig | 10 +++++----- arch/sparc/Kconfig | 8 ++++---- arch/sparc64/Kconfig | 8 ++++---- arch/um/Kconfig | 8 ++++---- arch/x86/Kconfig | 11 +++++------ include/linux/threads.h | 10 ++-------- 13 files changed, 51 insertions(+), 58 deletions(-) --- test-compile.orig/arch/alpha/Kconfig +++ test-compile/arch/alpha/Kconfig @@ -543,11 +543,11 @@ config HAVE_DEC_LOCK default y config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "32" if ALPHA_GENERIC || ALPHA_MARVEL - default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP + default "32" if SMP && (ALPHA_GENERIC || ALPHA_MARVEL) + default "4" if SMP && (!ALPHA_GENERIC && !ALPHA_MARVEL) help MARVEL support can handle a maximum of 32 CPUs, all the others with working support have a maximum of 4 CPUs. --- test-compile.orig/arch/arm/Kconfig +++ test-compile/arch/arm/Kconfig @@ -767,9 +767,9 @@ config PAGE_OFFSET default 0xC0000000 config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP default "4" config HOTPLUG_CPU --- test-compile.orig/arch/ia64/Kconfig +++ test-compile/arch/ia64/Kconfig @@ -313,10 +313,10 @@ config SMP If you don't know what to do here, say N. config NR_CPUS - int "Maximum number of CPUs (2-4096)" - range 2 4096 - depends on SMP - default "4096" + int "Maximum number of CPUs (2-4096)" if SMP + range 2 4096 if SMP + default "1" if !SMP + default "4096" if SMP help You should set this to the number of CPUs in your system, but keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but --- test-compile.orig/arch/m32r/Kconfig +++ test-compile/arch/m32r/Kconfig @@ -316,10 +316,10 @@ config CHIP_M32700_TS1 default n config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "2" + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP + default "2" if SMP help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 32 and the --- test-compile.orig/arch/mips/Kconfig +++ test-compile/arch/mips/Kconfig @@ -1719,9 +1719,9 @@ config NR_CPUS_DEFAULT_64 bool config NR_CPUS - int "Maximum number of CPUs (2-64)" + int "Maximum number of CPUs (2-64)" if SMP range 1 64 if NR_CPUS_DEFAULT_1 - depends on SMP + default "1" if !SMP default "1" if NR_CPUS_DEFAULT_1 default "2" if NR_CPUS_DEFAULT_2 default "4" if NR_CPUS_DEFAULT_4 --- test-compile.orig/arch/parisc/Kconfig +++ test-compile/arch/parisc/Kconfig @@ -251,10 +251,10 @@ config HPUX depends on !64BIT config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "32" + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP + default "32" if SMP endmenu --- test-compile.orig/arch/s390/Kconfig +++ test-compile/arch/s390/Kconfig @@ -113,11 +113,11 @@ config SMP Even if you don't know what to do here, say Y. config NR_CPUS - int "Maximum number of CPUs (2-64)" - range 2 64 - depends on SMP - default "32" if !64BIT - default "64" if 64BIT + int "Maximum number of CPUs (2-64)" if SMP + range 2 64 if SMP + default "1" if !SMP + default "32" if SMP && !64BIT + default "64" if SMP && 64BIT help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 64 and the --- test-compile.orig/arch/sh/Kconfig +++ test-compile/arch/sh/Kconfig @@ -528,11 +528,11 @@ config SMP If you don't know what to do here, say N. config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "4" if CPU_SHX3 - default "2" + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP + default "4" if SMP && CPU_SHX3 + default "2" if SMP help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 32 and the --- test-compile.orig/arch/sparc/Kconfig +++ test-compile/arch/sparc/Kconfig @@ -62,10 +62,10 @@ config SMP If you don't know what to do here, say N. config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "32" + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if SMP + default "32" if SMP config SPARC bool --- test-compile.orig/arch/sparc64/Kconfig +++ test-compile/arch/sparc64/Kconfig @@ -168,10 +168,10 @@ config SMP If you don't know what to do here, say N. config NR_CPUS - int "Maximum number of CPUs (2-1024)" - range 2 1024 - depends on SMP - default "64" + int "Maximum number of CPUs (2-1024)" if SMP + range 2 1024 if SMP + default "1" if !SMP + default "64" if SMP source "drivers/cpufreq/Kconfig" --- test-compile.orig/arch/um/Kconfig +++ test-compile/arch/um/Kconfig @@ -198,10 +198,10 @@ config SMP If you don't know what to do, say N. config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 - depends on SMP - default "32" + int "Maximum number of CPUs (2-32)" if SMP + range 2 32 if SMP + default "1" if !SMP + default "32" if SMP config HIGHMEM bool "Highmem support (EXPERIMENTAL)" --- test-compile.orig/arch/x86/Kconfig +++ test-compile/arch/x86/Kconfig @@ -586,12 +586,11 @@ endif if !MAXSMP config NR_CPUS - int "Maximum number of CPUs (2-512)" if !MAXSMP - range 2 512 - depends on SMP - default "4096" if MAXSMP - default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000 - default "8" + int "Maximum number of CPUs (2-512)" if SMP + range 2 512 if SMP + default "1" if !SMP + default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000) + default "8" if SMP help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 512 and the --- test-compile.orig/include/linux/threads.h +++ test-compile/include/linux/threads.h @@ -8,16 +8,10 @@ */ /* - * Maximum supported processors that can run under SMP. This value is - * set via configure setting. The maximum is equal to the size of the - * bitmasks used on that platform, i.e. 32 or 64. Setting this smaller - * saves quite a bit of memory. + * Maximum supported processors. Setting this smaller saves quite a + * bit of memory. Use nr_cpu_ids instead of this except for bitmaps. */ -#ifdef CONFIG_SMP #define NR_CPUS CONFIG_NR_CPUS -#else -#define NR_CPUS 1 -#endif #define MIN_THREADS_LEFT_FOR_ROOT 4 -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/