diff options
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/Kconfig | 7 | ||||
| -rw-r--r-- | arch/x86_64/kernel/k8.c | 7 |
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 145bb824b2a..5ce94430c01 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -428,12 +428,15 @@ config NR_CPUS memory in the static kernel configuration. config HOTPLUG_CPU - bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" + bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)" depends on SMP && HOTPLUG && EXPERIMENTAL help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. - Say N if you want to disable CPU hotplug. + This is also required for suspend/hibernation on SMP systems. + + Say N if you want to disable CPU hotplug and don't need to + suspend. config ARCH_ENABLE_MEMORY_HOTPLUG def_bool y diff --git a/arch/x86_64/kernel/k8.c b/arch/x86_64/kernel/k8.c index bc11b32e8b4..7377ccb2133 100644 --- a/arch/x86_64/kernel/k8.c +++ b/arch/x86_64/kernel/k8.c @@ -39,10 +39,10 @@ int cache_k8_northbridges(void) { int i; struct pci_dev *dev; + if (num_k8_northbridges) return 0; - num_k8_northbridges = 0; dev = NULL; while ((dev = next_k8_northbridge(dev)) != NULL) num_k8_northbridges++; @@ -52,6 +52,11 @@ int cache_k8_northbridges(void) if (!k8_northbridges) return -ENOMEM; + if (!num_k8_northbridges) { + k8_northbridges[0] = NULL; + return 0; + } + flush_words = kmalloc(num_k8_northbridges * sizeof(u32), GFP_KERNEL); if (!flush_words) { kfree(k8_northbridges); |