diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 | ||||
| -rw-r--r-- | arch/s390/Makefile | 1 | ||||
| -rw-r--r-- | arch/s390/include/asm/smp.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/init_task.c | 38 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 35 |
6 files changed, 6 insertions, 73 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index b42f2866594b..e16390c0bca8 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -122,6 +122,7 @@ config S390 select ARCH_INLINE_WRITE_UNLOCK_BH select ARCH_INLINE_WRITE_UNLOCK_IRQ select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE + select GENERIC_SMP_IDLE_THREAD config SCHED_OMIT_FRAME_POINTER def_bool y diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 0ad2f1e1ce9e..49e76e8b477d 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -91,7 +91,6 @@ OBJCOPYFLAGS := -O binary head-y := arch/s390/kernel/head.o head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o) -head-y += arch/s390/kernel/init_task.o # See arch/s390/Kbuild for content of core part of the kernel core-y += arch/s390/ diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h index c77c6de6f6c0..0b6f586c1383 100644 --- a/arch/s390/include/asm/smp.h +++ b/arch/s390/include/asm/smp.h @@ -16,7 +16,7 @@ extern struct mutex smp_cpu_state_mutex; extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; -extern int __cpu_up(unsigned int cpu); +extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 884b18afc864..9733b3f0eb6d 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -28,7 +28,7 @@ obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o \ obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o) obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o) -extra-y += head.o init_task.o vmlinux.lds +extra-y += head.o vmlinux.lds extra-y += $(if $(CONFIG_64BIT),head64.o,head31.o) obj-$(CONFIG_MODULES) += s390_ksyms.o module.o diff --git a/arch/s390/kernel/init_task.c b/arch/s390/kernel/init_task.c deleted file mode 100644 index 4d1c9fb0b540..000000000000 --- a/arch/s390/kernel/init_task.c +++ /dev/null @@ -1,38 +0,0 @@ -/* - * arch/s390/kernel/init_task.c - * - * S390 version - * - * Derived from "arch/i386/kernel/init_task.c" - */ - -#include <linux/mm.h> -#include <linux/fs.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/init_task.h> -#include <linux/mqueue.h> - -#include <asm/uaccess.h> -#include <asm/pgtable.h> - -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -/* - * Initial thread structure. - * - * We need to make sure that this is THREAD_SIZE aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union __init_task_data = - { INIT_THREAD_INFO(init_task) }; - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -struct task_struct init_task = INIT_TASK(init_task); - -EXPORT_SYMBOL(init_task); diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index e505458c6899..647ba9425893 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -85,7 +85,6 @@ enum { struct pcpu { struct cpu cpu; - struct task_struct *idle; /* idle process for the cpu */ struct _lowcore *lowcore; /* lowcore page(s) for the cpu */ unsigned long async_stack; /* async stack for the cpu */ unsigned long panic_stack; /* panic stack for the cpu */ @@ -725,26 +724,9 @@ static void __cpuinit smp_start_secondary(void *cpuvoid) cpu_idle(); } -struct create_idle { - struct work_struct work; - struct task_struct *idle; - struct completion done; - int cpu; -}; - -static void __cpuinit smp_fork_idle(struct work_struct *work) -{ - struct create_idle *c_idle; - - c_idle = container_of(work, struct create_idle, work); - c_idle->idle = fork_idle(c_idle->cpu); - complete(&c_idle->done); -} - /* Upping and downing of CPUs */ -int __cpuinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle) { - struct create_idle c_idle; struct pcpu *pcpu; int rc; @@ -754,22 +736,12 @@ int __cpuinit __cpu_up(unsigned int cpu) if (pcpu_sigp_retry(pcpu, sigp_initial_cpu_reset, 0) != sigp_order_code_accepted) return -EIO; - if (!pcpu->idle) { - c_idle.done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done); - INIT_WORK_ONSTACK(&c_idle.work, smp_fork_idle); - c_idle.cpu = cpu; - schedule_work(&c_idle.work); - wait_for_completion(&c_idle.done); - if (IS_ERR(c_idle.idle)) - return PTR_ERR(c_idle.idle); - pcpu->idle = c_idle.idle; - } - init_idle(pcpu->idle, cpu); + rc = pcpu_alloc_lowcore(pcpu, cpu); if (rc) return rc; pcpu_prepare_secondary(pcpu, cpu); - pcpu_attach_task(pcpu, pcpu->idle); + pcpu_attach_task(pcpu, tidle); pcpu_start_fn(pcpu, smp_start_secondary, NULL); while (!cpu_online(cpu)) cpu_relax(); @@ -856,7 +828,6 @@ void __init smp_prepare_boot_cpu(void) struct pcpu *pcpu = pcpu_devices; boot_cpu_address = stap(); - pcpu->idle = current; pcpu->state = CPU_STATE_CONFIGURED; pcpu->address = boot_cpu_address; pcpu->lowcore = (struct _lowcore *)(unsigned long) store_prefix(); |