diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpu.h | 12 | ||||
| -rw-r--r-- | include/linux/cpuhotplug.h | 136 | ||||
| -rw-r--r-- | include/linux/padata.h | 2 | ||||
| -rw-r--r-- | include/linux/perf/arm_pmu.h | 2 | ||||
| -rw-r--r-- | include/linux/relay.h | 23 | ||||
| -rw-r--r-- | include/linux/slab.h | 8 |
6 files changed, 158 insertions, 25 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index ad4f1f33a74e..7572d9e9dced 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -61,17 +61,8 @@ struct notifier_block; #define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */ #define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */ #define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */ -#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task, - * not handling interrupts, soon dead. - * Called on the dying cpu, interrupts - * are already disabled. Must not - * sleep, must not fail */ #define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug * lock is dropped */ -#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running. - * Called on the new cpu, just before - * enabling interrupts. Must not sleep, - * must not fail */ #define CPU_BROKEN 0x000B /* CPU (unsigned)v did not die properly, * perhaps due to preemption. */ @@ -86,9 +77,6 @@ struct notifier_block; #define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN) #define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN) #define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN) -#define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN) -#define CPU_STARTING_FROZEN (CPU_STARTING | CPU_TASKS_FROZEN) - #ifdef CONFIG_SMP extern bool cpuhp_tasks_frozen; diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index eb445a4e2a83..7b6c446ee17f 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -16,15 +16,40 @@ enum cpuhp_state { CPUHP_PERF_SUPERH, CPUHP_X86_HPET_DEAD, CPUHP_X86_APB_DEAD, + CPUHP_VIRT_NET_DEAD, + CPUHP_SLUB_DEAD, + CPUHP_MM_WRITEBACK_DEAD, + CPUHP_SOFTIRQ_DEAD, + CPUHP_NET_MVNETA_DEAD, + CPUHP_CPUIDLE_DEAD, + CPUHP_ARM64_FPSIMD_DEAD, + CPUHP_ARM_OMAP_WAKE_DEAD, + CPUHP_IRQ_POLL_DEAD, + CPUHP_BLOCK_SOFTIRQ_DEAD, + CPUHP_VIRT_SCSI_DEAD, + CPUHP_ACPI_CPUDRV_DEAD, + CPUHP_S390_PFAULT_DEAD, + CPUHP_BLK_MQ_DEAD, CPUHP_WORKQUEUE_PREP, CPUHP_POWER_NUMA_PREPARE, CPUHP_HRTIMERS_PREPARE, CPUHP_PROFILE_PREPARE, CPUHP_X2APIC_PREPARE, CPUHP_SMPCFD_PREPARE, + CPUHP_RELAY_PREPARE, + CPUHP_SLAB_PREPARE, + CPUHP_MD_RAID5_PREPARE, CPUHP_RCUTREE_PREP, + CPUHP_CPUIDLE_COUPLED_PREPARE, + CPUHP_POWERPC_PMAC_PREPARE, + CPUHP_POWERPC_MMU_CTX_PREPARE, CPUHP_NOTIFY_PREPARE, + CPUHP_ARM_SHMOBILE_SCU_PREPARE, + CPUHP_SH_SH3X_PREPARE, + CPUHP_BLK_MQ_PREPARE, CPUHP_TIMERS_DEAD, + CPUHP_NOTF_ERR_INJ_PREPARE, + CPUHP_MIPS_SOC_PREPARE, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD, CPUHP_AP_OFFLINE, @@ -72,7 +97,6 @@ enum cpuhp_state { CPUHP_AP_ARM64_ISNDEP_STARTING, CPUHP_AP_SMPCFD_DYING, CPUHP_AP_X86_TBOOT_DYING, - CPUHP_AP_NOTIFY_STARTING, CPUHP_AP_ONLINE, CPUHP_TEARDOWN_CPU, CPUHP_AP_ONLINE_IDLE, @@ -103,7 +127,7 @@ enum cpuhp_state { int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, int (*startup)(unsigned int cpu), - int (*teardown)(unsigned int cpu)); + int (*teardown)(unsigned int cpu), bool multi_instance); /** * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks @@ -120,7 +144,7 @@ static inline int cpuhp_setup_state(enum cpuhp_state state, int (*startup)(unsigned int cpu), int (*teardown)(unsigned int cpu)) { - return __cpuhp_setup_state(state, name, true, startup, teardown); + return __cpuhp_setup_state(state, name, true, startup, teardown, false); } /** @@ -139,7 +163,66 @@ static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, int (*startup)(unsigned int cpu), int (*teardown)(unsigned int cpu)) { - return __cpuhp_setup_state(state, name, false, startup, teardown); + return __cpuhp_setup_state(state, name, false, startup, teardown, + false); +} + +/** + * cpuhp_setup_state_multi - Add callbacks for multi state + * @state: The state for which the calls are installed + * @name: Name of the callback. + * @startup: startup callback function + * @teardown: teardown callback function + * + * Sets the internal multi_instance flag and prepares a state to work as a multi + * instance callback. No callbacks are invoked at this point. The callbacks are + * invoked once an instance for this state are registered via + * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. + */ +static inline int cpuhp_setup_state_multi(enum cpuhp_state state, + const char *name, + int (*startup)(unsigned int cpu, + struct hlist_node *node), + int (*teardown)(unsigned int cpu, + struct hlist_node *node)) +{ + return __cpuhp_setup_state(state, name, false, + (void *) startup, + (void *) teardown, true); +} + +int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, + bool invoke); + +/** + * cpuhp_state_add_instance - Add an instance for a state and invoke startup + * callback. + * @state: The state for which the instance is installed + * @node: The node for this individual state. + * + * Installs the instance for the @state and invokes the startup callback on + * the present cpus which have already reached the @state. The @state must have + * been earlier marked as multi-instance by @cpuhp_setup_state_multi. + */ +static inline int cpuhp_state_add_instance(enum cpuhp_state state, + struct hlist_node *node) +{ + return __cpuhp_state_add_instance(state, node, true); +} + +/** + * cpuhp_state_add_instance_nocalls - Add an instance for a state without + * invoking the startup callback. + * @state: The state for which the instance is installed + * @node: The node for this individual state. + * + * Installs the instance for the @state The @state must have been earlier + * marked as multi-instance by @cpuhp_setup_state_multi. + */ +static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, + struct hlist_node *node) +{ + return __cpuhp_state_add_instance(state, node, false); } void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); @@ -166,6 +249,51 @@ static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) __cpuhp_remove_state(state, false); } +/** + * cpuhp_remove_multi_state - Remove hotplug multi state callback + * @state: The state for which the calls are removed + * + * Removes the callback functions from a multi state. This is the reverse of + * cpuhp_setup_state_multi(). All instances should have been removed before + * invoking this function. + */ +static inline void cpuhp_remove_multi_state(enum cpuhp_state state) +{ + __cpuhp_remove_state(state, false); +} + +int __cpuhp_state_remove_instance(enum cpuhp_state state, + struct hlist_node *node, bool invoke); + +/** + * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke + * the teardown callback + * @state: The state from which the instance is removed + * @node: The node for this individual state. + * + * Removes the instance and invokes the teardown callback on the present cpus + * which have already reached the @state. + */ +static inline int cpuhp_state_remove_instance(enum cpuhp_state state, + struct hlist_node *node) +{ + return __cpuhp_state_remove_instance(state, node, true); +} + +/** + * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state + * without invoking the reatdown callback + * @state: The state from which the instance is removed + * @node: The node for this individual state. + * + * Removes the instance without invoking the teardown callback. + */ +static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, + struct hlist_node *node) +{ + return __cpuhp_state_remove_instance(state, node, false); +} + #ifdef CONFIG_SMP void cpuhp_online_idle(enum cpuhp_state state); #else diff --git a/include/linux/padata.h b/include/linux/padata.h index 113ee626a4dc..0f9e567d5e15 100644 --- a/include/linux/padata.h +++ b/include/linux/padata.h @@ -151,7 +151,7 @@ struct parallel_data { * @flags: padata flags. */ struct padata_instance { - struct notifier_block cpu_notifier; + struct hlist_node node; struct workqueue_struct *wq; struct parallel_data *pd; struct padata_cpumask cpumask; diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h index 9ff07d3fc8de..8462da266089 100644 --- a/include/linux/perf/arm_pmu.h +++ b/include/linux/perf/arm_pmu.h @@ -116,7 +116,7 @@ struct arm_pmu { DECLARE_BITMAP(pmceid_bitmap, ARMV8_PMUV3_MAX_COMMON_EVENTS); struct platform_device *plat_device; struct pmu_hw_events __percpu *hw_events; - struct list_head entry; + struct hlist_node node; struct notifier_block cpu_pm_nb; /* the attr_groups array must be NULL-terminated */ const struct attribute_group *attr_groups[ARMPMU_NR_ATTR_GROUPS + 1]; diff --git a/include/linux/relay.h b/include/linux/relay.h index d7c8359693c6..ecbb34a382b8 100644 --- a/include/linux/relay.h +++ b/include/linux/relay.h @@ -19,6 +19,7 @@ #include <linux/fs.h> #include <linux/poll.h> #include <linux/kref.h> +#include <linux/percpu.h> /* * Tracks changes to rchan/rchan_buf structs @@ -63,7 +64,7 @@ struct rchan struct kref kref; /* channel refcount */ void *private_data; /* for user-defined data */ size_t last_toobig; /* tried to log event > subbuf size */ - struct rchan_buf *buf[NR_CPUS]; /* per-cpu channel buffers */ + struct rchan_buf ** __percpu buf; /* per-cpu channel buffers */ int is_global; /* One global buffer ? */ struct list_head list; /* for channel list */ struct dentry *parent; /* parent dentry passed to open */ @@ -204,7 +205,7 @@ static inline void relay_write(struct rchan *chan, struct rchan_buf *buf; local_irq_save(flags); - buf = chan->buf[smp_processor_id()]; + buf = *this_cpu_ptr(chan->buf); if (unlikely(buf->offset + length > chan->subbuf_size)) length = relay_switch_subbuf(buf, length); memcpy(buf->data + buf->offset, data, length); @@ -230,12 +231,12 @@ static inline void __relay_write(struct rchan *chan, { struct rchan_buf *buf; - buf = chan->buf[get_cpu()]; + buf = *get_cpu_ptr(chan->buf); if (unlikely(buf->offset + length > buf->chan->subbuf_size)) length = relay_switch_subbuf(buf, length); memcpy(buf->data + buf->offset, data, length); buf->offset += length; - put_cpu(); + put_cpu_ptr(chan->buf); } /** @@ -251,17 +252,19 @@ static inline void __relay_write(struct rchan *chan, */ static inline void *relay_reserve(struct rchan *chan, size_t length) { - void *reserved; - struct rchan_buf *buf = chan->buf[smp_processor_id()]; + void *reserved = NULL; + struct rchan_buf *buf = *get_cpu_ptr(chan->buf); if (unlikely(buf->offset + length > buf->chan->subbuf_size)) { length = relay_switch_subbuf(buf, length); if (!length) - return NULL; + goto end; } reserved = buf->data + buf->offset; buf->offset += length; +end: + put_cpu_ptr(chan->buf); return reserved; } @@ -285,5 +288,11 @@ static inline void subbuf_start_reserve(struct rchan_buf *buf, */ extern const struct file_operations relay_file_operations; +#ifdef CONFIG_RELAY +int relay_prepare_cpu(unsigned int cpu); +#else +#define relay_prepare_cpu NULL +#endif + #endif /* _LINUX_RELAY_H */ diff --git a/include/linux/slab.h b/include/linux/slab.h index 4293808d8cfb..084b12bad198 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -650,4 +650,12 @@ static inline void *kzalloc_node(size_t size, gfp_t flags, int node) unsigned int kmem_cache_size(struct kmem_cache *s); void __init kmem_cache_init_late(void); +#if defined(CONFIG_SMP) && defined(CONFIG_SLAB) +int slab_prepare_cpu(unsigned int cpu); +int slab_dead_cpu(unsigned int cpu); +#else +#define slab_prepare_cpu NULL +#define slab_dead_cpu NULL +#endif + #endif /* _LINUX_SLAB_H */ |