diff options
| -rw-r--r-- | kernel/Makefile | 1 | ||||
| -rw-r--r-- | kernel/cpu.c | 8 | ||||
| -rw-r--r-- | kernel/smpboot.c | 14 | ||||
| -rw-r--r-- | kernel/smpboot.h | 6 |
4 files changed, 29 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index cb41b95..6c07f30 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_SMP) += smp.o +obj-$(CONFIG_SMP) += smpboot.o ifneq ($(CONFIG_SMP),y) obj-y += up.o endif diff --git a/kernel/cpu.c b/kernel/cpu.c index e711aef..e58b99a 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -17,6 +17,8 @@ #include <linux/gfp.h> #include <linux/suspend.h> +#include "smpboot.h" + #ifdef CONFIG_SMP /* Serializes the updates to cpu_online_mask, cpu_present_mask */ static DEFINE_MUTEX(cpu_add_remove_lock); @@ -300,6 +302,11 @@ static int __cpuinit _cpu_up(unsigned int cpu, int tasks_frozen) return -EINVAL; cpu_hotplug_begin(); + + ret = smpboot_prepare(cpu); + if (ret) + goto out; + ret = __cpu_notify(CPU_UP_PREPARE | mod, hcpu, -1, &nr_calls); if (ret) { nr_calls--; @@ -320,6 +327,7 @@ static int __cpuinit _cpu_up(unsigned int cpu, int tasks_frozen) out_notify: if (ret != 0) __cpu_notify(CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL); +out: cpu_hotplug_done(); return ret; diff --git a/kernel/smpboot.c b/kernel/smpboot.c new file mode 100644 index 0000000..6dae6a3 --- /dev/null +++ b/kernel/smpboot.c @@ -0,0 +1,14 @@ +/* + * Common SMP CPU bringup/teardown functions + */ +#include <linux/init.h> + +#include "smpboot.h" + +/** + * smpboot_prepare - generic smpboot preparation + */ +int __cpuinit smpboot_prepare(unsigned int cpu) +{ + return 0; +} diff --git a/kernel/smpboot.h b/kernel/smpboot.h new file mode 100644 index 0000000..d88e771 --- /dev/null +++ b/kernel/smpboot.h @@ -0,0 +1,6 @@ +#ifndef SMPBOOT_H +#define SMPBOOT_H + +int smpboot_prepare(unsigned int cpu); + +#endif |
