From fbd59a8d1f7cf325fdb6828659f1fb76631e87b3 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Sat, 10 Jan 2009 21:58:08 -0800 Subject: cpumask: Use topology_core_cpumask()/topology_thread_cpumask() Impact: reduce stack usage, use new cpumask API. This actually uses topology_core_cpumask() and topology_thread_cpumask(), removing the only users of topology_core_siblings() and topology_thread_siblings() Signed-off-by: Rusty Russell Signed-off-by: Mike Travis Cc: linux-net-drivers@solarflare.com --- drivers/base/topology.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/topology.c b/drivers/base/topology.c index a778fb52b11f..bf6b13206d00 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -31,7 +31,10 @@ #include #include -#define define_one_ro(_name) \ +#define define_one_ro_named(_name, _func) \ +static SYSDEV_ATTR(_name, 0444, _func, NULL) + +#define define_one_ro(_name) \ static SYSDEV_ATTR(_name, 0444, show_##_name, NULL) #define define_id_show_func(name) \ @@ -42,8 +45,8 @@ static ssize_t show_##name(struct sys_device *dev, \ return sprintf(buf, "%d\n", topology_##name(cpu)); \ } -#if defined(topology_thread_siblings) || defined(topology_core_siblings) -static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf) +#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) +static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf) { ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf; int n = 0; @@ -65,7 +68,7 @@ static ssize_t show_##name(struct sys_device *dev, \ struct sysdev_attribute *attr, char *buf) \ { \ unsigned int cpu = dev->id; \ - return show_cpumap(0, &(topology_##name(cpu)), buf); \ + return show_cpumap(0, topology_##name(cpu), buf); \ } #define define_siblings_show_list(name) \ @@ -74,7 +77,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \ char *buf) \ { \ unsigned int cpu = dev->id; \ - return show_cpumap(1, &(topology_##name(cpu)), buf); \ + return show_cpumap(1, topology_##name(cpu), buf); \ } #else @@ -82,9 +85,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \ static ssize_t show_##name(struct sys_device *dev, \ struct sysdev_attribute *attr, char *buf) \ { \ - unsigned int cpu = dev->id; \ - cpumask_t mask = topology_##name(cpu); \ - return show_cpumap(0, &mask, buf); \ + return show_cpumap(0, topology_##name(dev->id), buf); \ } #define define_siblings_show_list(name) \ @@ -92,9 +93,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \ struct sysdev_attribute *attr, \ char *buf) \ { \ - unsigned int cpu = dev->id; \ - cpumask_t mask = topology_##name(cpu); \ - return show_cpumap(1, &mask, buf); \ + return show_cpumap(1, topology_##name(dev->id), buf); \ } #endif @@ -107,13 +106,13 @@ define_one_ro(physical_package_id); define_id_show_func(core_id); define_one_ro(core_id); -define_siblings_show_func(thread_siblings); -define_one_ro(thread_siblings); -define_one_ro(thread_siblings_list); +define_siblings_show_func(thread_cpumask); +define_one_ro_named(thread_siblings, show_thread_cpumask); +define_one_ro_named(thread_siblings_list, show_thread_cpumask_list); -define_siblings_show_func(core_siblings); -define_one_ro(core_siblings); -define_one_ro(core_siblings_list); +define_siblings_show_func(core_cpumask); +define_one_ro_named(core_siblings, show_core_cpumask); +define_one_ro_named(core_siblings_list, show_core_cpumask_list); static struct attribute *default_attrs[] = { &attr_physical_package_id.attr, -- cgit v1.2.3 From f7df8ed164996cd2c6aca9674388be6ef78d8b37 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Sat, 10 Jan 2009 21:58:09 -0800 Subject: cpumask: convert misc driver functions Impact: use new cpumask API. Convert misc driver functions to use struct cpumask. To Do: - Convert iucv_buffer_cpumask to cpumask_var_t. Signed-off-by: Rusty Russell Signed-off-by: Mike Travis Acked-by: Dean Nelson Cc: Robert Richter Cc: oprofile-list@lists.sf.net Cc: Jeremy Fitzhardinge Cc: Chris Wright Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com Cc: Ursula Braun Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org --- drivers/base/cpu.c | 2 +- drivers/misc/sgi-xp/xpc_main.c | 2 +- drivers/oprofile/buffer_sync.c | 22 ++++++++++++++++++---- drivers/oprofile/buffer_sync.h | 4 ++++ drivers/oprofile/oprof.c | 9 ++++++++- drivers/xen/manage.c | 2 +- 6 files changed, 33 insertions(+), 8 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 719ee5c1c8d9..5b257a57bc57 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -107,7 +107,7 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL); /* * Print cpu online, possible, present, and system maps */ -static ssize_t print_cpus_map(char *buf, cpumask_t *map) +static ssize_t print_cpus_map(char *buf, const struct cpumask *map) { int n = cpulist_scnprintf(buf, PAGE_SIZE-2, map); diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c index 89218f7cfaa7..6576170de962 100644 --- a/drivers/misc/sgi-xp/xpc_main.c +++ b/drivers/misc/sgi-xp/xpc_main.c @@ -318,7 +318,7 @@ xpc_hb_checker(void *ignore) /* this thread was marked active by xpc_hb_init() */ - set_cpus_allowed_ptr(current, &cpumask_of_cpu(XPC_HB_CHECK_CPU)); + set_cpus_allowed_ptr(current, cpumask_of(XPC_HB_CHECK_CPU)); /* set our heartbeating to other partitions into motion */ xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ); diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index 9da5a4b81133..c3ea5fa7d05a 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -38,7 +38,7 @@ static LIST_HEAD(dying_tasks); static LIST_HEAD(dead_tasks); -static cpumask_t marked_cpus = CPU_MASK_NONE; +static cpumask_var_t marked_cpus; static DEFINE_SPINLOCK(task_mortuary); static void process_task_mortuary(void); @@ -456,10 +456,10 @@ static void mark_done(int cpu) { int i; - cpu_set(cpu, marked_cpus); + cpumask_set_cpu(cpu, marked_cpus); for_each_online_cpu(i) { - if (!cpu_isset(i, marked_cpus)) + if (!cpumask_test_cpu(i, marked_cpus)) return; } @@ -468,7 +468,7 @@ static void mark_done(int cpu) */ process_task_mortuary(); - cpus_clear(marked_cpus); + cpumask_clear(marked_cpus); } @@ -565,6 +565,20 @@ void sync_buffer(int cpu) mutex_unlock(&buffer_mutex); } +int __init buffer_sync_init(void) +{ + if (!alloc_cpumask_var(&marked_cpus, GFP_KERNEL)) + return -ENOMEM; + + cpumask_clear(marked_cpus); + return 0; +} + +void __exit buffer_sync_cleanup(void) +{ + free_cpumask_var(marked_cpus); +} + /* The function can be used to add a buffer worth of data directly to * the kernel buffer. The buffer is assumed to be a circular buffer. * Take the entries from index start and end at index end, wrapping diff --git a/drivers/oprofile/buffer_sync.h b/drivers/oprofile/buffer_sync.h index 3110732c1835..0ebf5db62679 100644 --- a/drivers/oprofile/buffer_sync.h +++ b/drivers/oprofile/buffer_sync.h @@ -19,4 +19,8 @@ void sync_stop(void); /* sync the given CPU's buffer */ void sync_buffer(int cpu); +/* initialize/destroy the buffer system. */ +int buffer_sync_init(void); +void buffer_sync_cleanup(void); + #endif /* OPROFILE_BUFFER_SYNC_H */ diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c index 3cffce90f82a..ced39f602292 100644 --- a/drivers/oprofile/oprof.c +++ b/drivers/oprofile/oprof.c @@ -183,6 +183,10 @@ static int __init oprofile_init(void) { int err; + err = buffer_sync_init(); + if (err) + return err; + err = oprofile_arch_init(&oprofile_ops); if (err < 0 || timer) { @@ -191,8 +195,10 @@ static int __init oprofile_init(void) } err = oprofilefs_register(); - if (err) + if (err) { oprofile_arch_exit(); + buffer_sync_cleanup(); + } return err; } @@ -202,6 +208,7 @@ static void __exit oprofile_exit(void) { oprofilefs_unregister(); oprofile_arch_exit(); + buffer_sync_cleanup(); } diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 9b91617b9582..e7e83b65c18f 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -100,7 +100,7 @@ static void do_suspend(void) /* XXX use normal device tree? */ xenbus_suspend(); - err = stop_machine(xen_suspend, &cancelled, &cpumask_of_cpu(0)); + err = stop_machine(xen_suspend, &cancelled, cpumask_of(0)); if (err) { printk(KERN_ERR "failed to start xen_suspend: %d\n", err); goto out; -- cgit v1.2.3 From 216773a787c3c46ef26bf1742c1fdba37d26be45 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Sat, 14 Feb 2009 01:59:06 +0100 Subject: Consolidate driver_probe_done() loops into one place there's a few places that currently loop over driver_probe_done(), and I'm about to add another one. This patch abstracts it into a helper to reduce duplication. Signed-off-by: Arjan van de Ven Signed-off-by: Rafael J. Wysocki Cc: Len Brown Acked-by: Greg KH Signed-off-by: Linus Torvalds --- drivers/base/dd.c | 17 +++++++++++++++++ include/linux/device.h | 2 ++ init/do_mounts.c | 13 +++++++++---- init/do_mounts_md.c | 5 +++-- 4 files changed, 31 insertions(+), 6 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 315bed8d5e7f..135231239103 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -18,9 +18,11 @@ */ #include +#include #include #include #include +#include #include "base.h" #include "power/power.h" @@ -167,6 +169,21 @@ int driver_probe_done(void) return 0; } +/** + * wait_for_device_probe + * Wait for device probing to be completed. + * + * Note: this function polls at 100 msec intervals. + */ +int wait_for_device_probe(void) +{ + /* wait for the known devices to complete their probing */ + while (driver_probe_done() != 0) + msleep(100); + async_synchronize_full(); + return 0; +} + /** * driver_probe_device - attempt to bind device & driver together * @drv: driver to bind a device to diff --git a/include/linux/device.h b/include/linux/device.h index 45e5b1921fbb..47f343c7bdda 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -147,6 +147,8 @@ extern void put_driver(struct device_driver *drv); extern struct device_driver *driver_find(const char *name, struct bus_type *bus); extern int driver_probe_done(void); +extern int wait_for_device_probe(void); + /* sysfs interface for exporting driver attributes */ diff --git a/init/do_mounts.c b/init/do_mounts.c index 708105e163df..8d4ff5afc1d8 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -370,10 +370,14 @@ void __init prepare_namespace(void) ssleep(root_delay); } - /* wait for the known devices to complete their probing */ - while (driver_probe_done() != 0) - msleep(100); - async_synchronize_full(); + /* + * wait for the known devices to complete their probing + * + * Note: this is a potential source of long boot delays. + * For example, it is not atypical to wait 5 seconds here + * for the touchpad of a laptop to initialize. + */ + wait_for_device_probe(); md_run_setup(); @@ -399,6 +403,7 @@ void __init prepare_namespace(void) while (driver_probe_done() != 0 || (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) msleep(100); + async_synchronize_full(); } is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c index ff95e3192884..9bdddbcb3d6a 100644 --- a/init/do_mounts_md.c +++ b/init/do_mounts_md.c @@ -281,8 +281,9 @@ static void __init autodetect_raid(void) */ printk(KERN_INFO "md: Waiting for all devices to be available before autodetect\n"); printk(KERN_INFO "md: If you don't use raid, use raid=noautodetect\n"); - while (driver_probe_done() < 0) - msleep(100); + + wait_for_device_probe(); + fd = sys_open("/dev/md0", 0, 0); if (fd >= 0) { sys_ioctl(fd, RAID_AUTORUN, raid_autopart); -- cgit v1.2.3 From 770824bdc421ff58a64db608294323571c949f4c Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 22 Feb 2009 18:38:50 +0100 Subject: PM: Split up sysdev_[suspend|resume] from device_power_[down|up] Move the sysdev_suspend/resume from the callee to the callers, with no real change in semantics, so that we can rework the disabling of interrupts during suspend/hibernation. This is based on an earlier patch from Linus. Signed-off-by: Rafael J. Wysocki Signed-off-by: Linus Torvalds --- arch/x86/kernel/apm_32.c | 4 ++++ drivers/base/base.h | 2 -- drivers/base/power/main.c | 3 --- drivers/xen/manage.c | 8 ++++++++ include/linux/pm.h | 2 ++ kernel/kexec.c | 7 +++++++ kernel/power/disk.c | 11 +++++++++++ kernel/power/main.c | 8 ++++++-- 8 files changed, 38 insertions(+), 7 deletions(-) (limited to 'drivers/base') diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c index 98807bb095ad..266ec6c18b6c 100644 --- a/arch/x86/kernel/apm_32.c +++ b/arch/x86/kernel/apm_32.c @@ -1192,6 +1192,7 @@ static int suspend(int vetoable) device_suspend(PMSG_SUSPEND); local_irq_disable(); device_power_down(PMSG_SUSPEND); + sysdev_suspend(PMSG_SUSPEND); local_irq_enable(); @@ -1208,6 +1209,7 @@ static int suspend(int vetoable) if (err != APM_SUCCESS) apm_error("suspend", err); err = (err == APM_SUCCESS) ? 0 : -EIO; + sysdev_resume(); device_power_up(PMSG_RESUME); local_irq_enable(); device_resume(PMSG_RESUME); @@ -1228,6 +1230,7 @@ static void standby(void) local_irq_disable(); device_power_down(PMSG_SUSPEND); + sysdev_suspend(PMSG_SUSPEND); local_irq_enable(); err = set_system_power_state(APM_STATE_STANDBY); @@ -1235,6 +1238,7 @@ static void standby(void) apm_error("standby", err); local_irq_disable(); + sysdev_resume(); device_power_up(PMSG_RESUME); local_irq_enable(); } diff --git a/drivers/base/base.h b/drivers/base/base.h index 0a5f055dffba..9f50f1b545dc 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -88,8 +88,6 @@ extern void driver_detach(struct device_driver *drv); extern int driver_probe_device(struct device_driver *drv, struct device *dev); extern void sysdev_shutdown(void); -extern int sysdev_suspend(pm_message_t state); -extern int sysdev_resume(void); extern char *make_class_name(const char *name, struct kobject *kobj); diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 670c9d6c1407..2d14f4ae6c01 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -333,7 +333,6 @@ static void dpm_power_up(pm_message_t state) */ void device_power_up(pm_message_t state) { - sysdev_resume(); dpm_power_up(state); } EXPORT_SYMBOL_GPL(device_power_up); @@ -577,8 +576,6 @@ int device_power_down(pm_message_t state) } dev->power.status = DPM_OFF_IRQ; } - if (!error) - error = sysdev_suspend(state); if (error) dpm_power_up(resume_event(state)); return error; diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 9b91617b9582..56892a142ee2 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -45,6 +45,13 @@ static int xen_suspend(void *data) err); return err; } + err = sysdev_suspend(PMSG_SUSPEND); + if (err) { + printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n", + err); + device_power_up(PMSG_RESUME); + return err; + } xen_mm_pin_all(); gnttab_suspend(); @@ -61,6 +68,7 @@ static int xen_suspend(void *data) gnttab_resume(); xen_mm_unpin_all(); + sysdev_resume(); device_power_up(PMSG_RESUME); if (!*cancelled) { diff --git a/include/linux/pm.h b/include/linux/pm.h index de2e0a8f6728..24ba5f67b3a3 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -381,10 +381,12 @@ struct dev_pm_info { #ifdef CONFIG_PM_SLEEP extern void device_pm_lock(void); +extern int sysdev_resume(void); extern void device_power_up(pm_message_t state); extern void device_resume(pm_message_t state); extern void device_pm_unlock(void); +extern int sysdev_suspend(pm_message_t state); extern int device_power_down(pm_message_t state); extern int device_suspend(pm_message_t state); extern int device_prepare_suspend(pm_message_t state); diff --git a/kernel/kexec.c b/kernel/kexec.c index 8a6d7b08864e..483899578259 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -1465,6 +1465,11 @@ int kernel_kexec(void) error = device_power_down(PMSG_FREEZE); if (error) goto Enable_irqs; + + /* Suspend system devices */ + error = sysdev_suspend(PMSG_FREEZE); + if (error) + goto Power_up_devices; } else #endif { @@ -1477,6 +1482,8 @@ int kernel_kexec(void) #ifdef CONFIG_KEXEC_JUMP if (kexec_image->preserve_context) { + sysdev_resume(); + Power_up_devices: device_power_up(PMSG_RESTORE); Enable_irqs: local_irq_enable(); diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 7b40e94b1d42..4a4a206b1979 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -227,6 +227,12 @@ static int create_image(int platform_mode) "aborting hibernation\n"); goto Enable_irqs; } + sysdev_suspend(PMSG_FREEZE); + if (error) { + printk(KERN_ERR "PM: Some devices failed to power down, " + "aborting hibernation\n"); + goto Power_up_devices; + } if (hibernation_test(TEST_CORE)) goto Power_up; @@ -242,9 +248,11 @@ static int create_image(int platform_mode) if (!in_suspend) platform_leave(platform_mode); Power_up: + sysdev_resume(); /* NOTE: device_power_up() is just a resume() for devices * that suspended with irqs off ... no overall powerup. */ + Power_up_devices: device_power_up(in_suspend ? (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE); Enable_irqs: @@ -335,6 +343,7 @@ static int resume_target_kernel(void) "aborting resume\n"); goto Enable_irqs; } + sysdev_suspend(PMSG_QUIESCE); /* We'll ignore saved state, but this gets preempt count (etc) right */ save_processor_state(); error = restore_highmem(); @@ -357,6 +366,7 @@ static int resume_target_kernel(void) swsusp_free(); restore_processor_state(); touch_softlockup_watchdog(); + sysdev_resume(); device_power_up(PMSG_RECOVER); Enable_irqs: local_irq_enable(); @@ -440,6 +450,7 @@ int hibernation_platform_enter(void) local_irq_disable(); error = device_power_down(PMSG_HIBERNATE); if (!error) { + sysdev_suspend(PMSG_HIBERNATE); hibernation_ops->enter(); /* We should never get here */ while (1); diff --git a/kernel/power/main.c b/kernel/power/main.c index b4d219016b6c..c9632f841f64 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -298,8 +298,12 @@ static int suspend_enter(suspend_state_t state) goto Done; } - if (!suspend_test(TEST_CORE)) - error = suspend_ops->enter(state); + error = sysdev_suspend(PMSG_SUSPEND); + if (!error) { + if (!suspend_test(TEST_CORE)) + error = suspend_ops->enter(state); + sysdev_resume(); + } device_power_up(PMSG_RESUME); Done: -- cgit v1.2.3 From 0f99fed4606dcbcbe813df831a39fd8f9653ef54 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 22 Feb 2009 22:07:03 +0100 Subject: PM: Split up sysdev_[suspend|resume] from device_power_[down|up], fix Impact: module build fix Fix: ERROR: "sysdev_resume" [arch/x86/kernel/apm.ko] undefined! ERROR: "sysdev_suspend" [arch/x86/kernel/apm.ko] undefined! As these APIs are now used by the APM driver, which can be built as a module. Also fix a few extra (and inconsistent) newlines in comment blocks preceding these functions. Signed-off-by: Ingo Molnar --- drivers/base/sys.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/sys.c b/drivers/base/sys.c index c98c31ec2f75..b428c8c4bc64 100644 --- a/drivers/base/sys.c +++ b/drivers/base/sys.c @@ -303,7 +303,6 @@ void sysdev_unregister(struct sys_device * sysdev) * is guaranteed by virtue of the fact that child devices are registered * after their parents. */ - void sysdev_shutdown(void) { struct sysdev_class * cls; @@ -363,7 +362,6 @@ static void __sysdev_resume(struct sys_device *dev) * This is only called by the device PM core, so we let them handle * all synchronization. */ - int sysdev_suspend(pm_message_t state) { struct sysdev_class * cls; @@ -432,7 +430,7 @@ aux_driver: } return ret; } - +EXPORT_SYMBOL_GPL(sysdev_suspend); /** * sysdev_resume - Bring system devices back to life. @@ -442,7 +440,6 @@ aux_driver: * * Note: Interrupts are disabled when called. */ - int sysdev_resume(void) { struct sysdev_class * cls; @@ -463,7 +460,7 @@ int sysdev_resume(void) } return 0; } - +EXPORT_SYMBOL_GPL(sysdev_resume); int __init system_bus_init(void) { -- cgit v1.2.3