1 files changed, 15 insertions, 11 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a1cd84f9b3bc..c78b14380b3e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -250,7 +250,7 @@ config LASAT
         select R5000_CPU_SCACHE
         select SYS_HAS_CPU_R5000
         select SYS_SUPPORTS_32BIT_KERNEL
-        select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
+        select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select GENERIC_HARDIRQS_NO__DO_IRQ
 
@@ -470,11 +470,6 @@ config MIPS_XXS1500
         select SOC_AU1500
         select SYS_SUPPORTS_LITTLE_ENDIAN
 
-config PNX8550_V2PCI
-        bool "Philips PNX8550 based Viper2-PCI board"
-        select PNX8550
-        select SYS_SUPPORTS_LITTLE_ENDIAN
-
 config PNX8550_JBS
         bool "Philips PNX8550 based JBS board"
         select PNX8550
@@ -547,6 +542,8 @@ config QEMU
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select ARCH_SPARSEMEM_ENABLE
         select GENERIC_HARDIRQS_NO__DO_IRQ
+        select NR_CPUS_DEFAULT_1
+        select SYS_SUPPORTS_SMP
         help
           Qemu is a software emulator which among other architectures also
           can simulate a MIPS32 4Kc system.  This patch adds support for the
@@ -1564,6 +1561,7 @@ config MIPS_MT_SMP
         select CPU_MIPSR2_IRQ_VI
         select CPU_MIPSR2_SRS
         select MIPS_MT
+        select NR_CPUS_DEFAULT_2
         select SMP
         select SYS_SUPPORTS_SMP
         help
@@ -1578,7 +1576,6 @@ config MIPS_MT_SMTC
         select CPU_MIPSR2_IRQ_VI
         select CPU_MIPSR2_SRS
         select MIPS_MT
-        select NR_CPUS_DEFAULT_2
         select NR_CPUS_DEFAULT_8
         select SMP
         select SYS_SUPPORTS_SMP
@@ -1609,7 +1606,7 @@ config MIPS_MT_FPAFF
 
 config MIPS_MT_SMTC_INSTANT_REPLAY
         bool "Low-latency Dispatch of Deferred SMTC IPIs"
-        depends on MIPS_MT_SMTC
+        depends on MIPS_MT_SMTC && !PREEMPT
         default y
         help
           SMTC pseudo-interrupts between TCs are deferred and queued
@@ -1810,6 +1807,9 @@ config SMP
 config SYS_SUPPORTS_SMP
         bool
 
+config NR_CPUS_DEFAULT_1
+        bool
+
 config NR_CPUS_DEFAULT_2
         bool
 
@@ -1830,8 +1830,9 @@ config NR_CPUS_DEFAULT_64
 
 config NR_CPUS
         int "Maximum number of CPUs (2-64)"
-        range 2 64
+        range 1 64 if NR_CPUS_DEFAULT_1
         depends on SMP
+        default "1" if NR_CPUS_DEFAULT_1
         default "2" if NR_CPUS_DEFAULT_2
         default "4" if NR_CPUS_DEFAULT_4
         default "8" if NR_CPUS_DEFAULT_8
@@ -1842,10 +1843,13 @@ config NR_CPUS
           This allows you to specify the maximum number of CPUs which this
           kernel will support.  The maximum supported value is 32 for 32-bit
           kernel and 64 for 64-bit kernels; the minimum value which makes
-          sense is 2.
+          sense is 1 for Qemu (useful only for kernel debugging purposes)
+          and 2 for all others.
 
           This is purely to save memory - each supported CPU adds
-          approximately eight kilobytes to the kernel image.
+          approximately eight kilobytes to the kernel image.  For best
+          performance should round up your number of processors to the next
+          power of two.
 
 #
 # Timer Interrupt Frequency Configuration