diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/Makefile | 2 | ||||
| -rw-r--r-- | drivers/base/bus.c | 8 | ||||
| -rw-r--r-- | drivers/base/cacheinfo.c | 539 | ||||
| -rw-r--r-- | drivers/base/core.c | 38 | ||||
| -rw-r--r-- | drivers/base/cpu.c | 59 | ||||
| -rw-r--r-- | drivers/base/devcoredump.c | 56 | ||||
| -rw-r--r-- | drivers/base/firmware_class.c | 7 | ||||
| -rw-r--r-- | drivers/base/node.c | 14 | ||||
| -rw-r--r-- | drivers/base/platform.c | 22 | ||||
| -rw-r--r-- | drivers/base/topology.c | 71 |
10 files changed, 709 insertions, 107 deletions
diff --git a/drivers/base/Makefile b/drivers/base/Makefile index 53c3fe1aeb2..527d291706e 100644 --- a/drivers/base/Makefile +++ b/drivers/base/Makefile @@ -4,7 +4,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \ driver.o class.o platform.o \ cpu.o firmware.o init.o map.o devres.o \ attribute_container.o transport_class.o \ - topology.o container.o property.o + topology.o container.o property.o cacheinfo.o obj-$(CONFIG_DEVTMPFS) += devtmpfs.o obj-$(CONFIG_DMA_CMA) += dma-contiguous.o obj-y += power/ diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 83e910a5756..876bae5ade3 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -254,13 +254,15 @@ static ssize_t store_drivers_probe(struct bus_type *bus, const char *buf, size_t count) { struct device *dev; + int err = -EINVAL; dev = bus_find_device_by_name(bus, NULL, buf); if (!dev) return -ENODEV; - if (bus_rescan_devices_helper(dev, NULL) != 0) - return -EINVAL; - return count; + if (bus_rescan_devices_helper(dev, NULL) == 0) + err = count; + put_device(dev); + return err; } static struct device *next_device(struct klist_iter *i) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c new file mode 100644 index 00000000000..6e64563361f --- /dev/null +++ b/drivers/base/cacheinfo.c @@ -0,0 +1,539 @@ +/* + * cacheinfo support - processor cache information via sysfs + * + * Based on arch/x86/kernel/cpu/intel_cacheinfo.c + * Author: Sudeep Holla <sudeep.holla@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <linux/bitops.h> +#include <linux/cacheinfo.h> +#include <linux/compiler.h> +#include <linux/cpu.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/smp.h> +#include <linux/sysfs.h> + +/* pointer to per cpu cacheinfo */ +static DEFINE_PER_CPU(struct cpu_cacheinfo, ci_cpu_cacheinfo); +#define ci_cacheinfo(cpu) (&per_cpu(ci_cpu_cacheinfo, cpu)) +#define cache_leaves(cpu) (ci_cacheinfo(cpu)->num_leaves) +#define per_cpu_cacheinfo(cpu) (ci_cacheinfo(cpu)->info_list) + +struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu) +{ + return ci_cacheinfo(cpu); +} + +#ifdef CONFIG_OF +static int cache_setup_of_node(unsigned int cpu) +{ + struct device_node *np; + struct cacheinfo *this_leaf; + struct device *cpu_dev = get_cpu_device(cpu); + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + unsigned int index = 0; + + /* skip if of_node is already populated */ + if (this_cpu_ci->info_list->of_node) + return 0; + + if (!cpu_dev) { + pr_err("No cpu device for CPU %d\n", cpu); + return -ENODEV; + } + np = cpu_dev->of_node; + if (!np) { + pr_err("Failed to find cpu%d device node\n", cpu); + return -ENOENT; + } + + while (np && index < cache_leaves(cpu)) { + this_leaf = this_cpu_ci->info_list + index; + if (this_leaf->level != 1) + np = of_find_next_cache_node(np); + else + np = of_node_get(np);/* cpu node itself */ + this_leaf->of_node = np; + index++; + } + return 0; +} + +static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf, + struct cacheinfo *sib_leaf) +{ + return sib_leaf->of_node == this_leaf->of_node; +} +#else +static inline int cache_setup_of_node(unsigned int cpu) { return 0; } +static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf, + struct cacheinfo *sib_leaf) +{ + /* + * For non-DT systems, assume unique level 1 cache, system-wide + * shared caches for all other levels. This will be used only if + * arch specific code has not populated shared_cpu_map + */ + return !(this_leaf->level == 1); +} +#endif + +static int cache_shared_cpu_map_setup(unsigned int cpu) +{ + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf, *sib_leaf; + unsigned int index; + int ret; + + ret = cache_setup_of_node(cpu); + if (ret) + return ret; + + for (index = 0; index < cache_leaves(cpu); index++) { + unsigned int i; + + this_leaf = this_cpu_ci->info_list + index; + /* skip if shared_cpu_map is already populated */ + if (!cpumask_empty(&this_leaf->shared_cpu_map)) + continue; + + cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); + for_each_online_cpu(i) { + struct cpu_cacheinfo *sib_cpu_ci = get_cpu_cacheinfo(i); + + if (i == cpu || !sib_cpu_ci->info_list) + continue;/* skip if itself or no cacheinfo */ + sib_leaf = sib_cpu_ci->info_list + index; + if (cache_leaves_are_shared(this_leaf, sib_leaf)) { + cpumask_set_cpu(cpu, &sib_leaf->shared_cpu_map); + cpumask_set_cpu(i, &this_leaf->shared_cpu_map); + } + } + } + + return 0; +} + +static void cache_shared_cpu_map_remove(unsigned int cpu) +{ + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf, *sib_leaf; + unsigned int sibling, index; + + for (index = 0; index < cache_leaves(cpu); index++) { + this_leaf = this_cpu_ci->info_list + index; + for_each_cpu(sibling, &this_leaf->shared_cpu_map) { + struct cpu_cacheinfo *sib_cpu_ci; + + if (sibling == cpu) /* skip itself */ + continue; + sib_cpu_ci = get_cpu_cacheinfo(sibling); + sib_leaf = sib_cpu_ci->info_list + index; + cpumask_clear_cpu(cpu, &sib_leaf->shared_cpu_map); + cpumask_clear_cpu(sibling, &this_leaf->shared_cpu_map); + } + of_node_put(this_leaf->of_node); + } +} + +static void free_cache_attributes(unsigned int cpu) +{ + cache_shared_cpu_map_remove(cpu); + + kfree(per_cpu_cacheinfo(cpu)); + per_cpu_cacheinfo(cpu) = NULL; +} + +int __weak init_cache_level(unsigned int cpu) +{ + return -ENOENT; +} + +int __weak populate_cache_leaves(unsigned int cpu) +{ + return -ENOENT; +} + +static int detect_cache_attributes(unsigned int cpu) +{ + int ret; + + if (init_cache_level(cpu)) + return -ENOENT; + + per_cpu_cacheinfo(cpu) = kcalloc(cache_leaves(cpu), + sizeof(struct cacheinfo), GFP_KERNEL); + if (per_cpu_cacheinfo(cpu) == NULL) + return -ENOMEM; + + ret = populate_cache_leaves(cpu); + if (ret) + goto free_ci; + /* + * For systems using DT for cache hierarcy, of_node and shared_cpu_map + * will be set up here only if they are not populated already + */ + ret = cache_shared_cpu_map_setup(cpu); + if (ret) + goto free_ci; + return 0; + +free_ci: + free_cache_attributes(cpu); + return ret; +} + +/* pointer to cpuX/cache device */ +static DEFINE_PER_CPU(struct device *, ci_cache_dev); +#define per_cpu_cache_dev(cpu) (per_cpu(ci_cache_dev, cpu)) + +static cpumask_t cache_dev_map; + +/* pointer to array of devices for cpuX/cache/indexY */ +static DEFINE_PER_CPU(struct device **, ci_index_dev); +#define per_cpu_index_dev(cpu) (per_cpu(ci_index_dev, cpu)) +#define per_cache_index_dev(cpu, idx) ((per_cpu_index_dev(cpu))[idx]) + +#define show_one(file_name, object) \ +static ssize_t file_name##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ + return sprintf(buf, "%u\n", this_leaf->object); \ +} + +show_one(level, level); +show_one(coherency_line_size, coherency_line_size); +show_one(number_of_sets, number_of_sets); +show_one(physical_line_partition, physical_line_partition); +show_one(ways_of_associativity, ways_of_associativity); + +static ssize_t size_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + + return sprintf(buf, "%uK\n", this_leaf->size >> 10); +} + +static ssize_t shared_cpumap_show_func(struct device *dev, bool list, char *buf) +{ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + const struct cpumask *mask = &this_leaf->shared_cpu_map; + + return cpumap_print_to_pagebuf(list, buf, mask); +} + +static ssize_t shared_cpu_map_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return shared_cpumap_show_func(dev, false, buf); +} + +static ssize_t shared_cpu_list_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return shared_cpumap_show_func(dev, true, buf); +} + +static ssize_t type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + + switch (this_leaf->type) { + case CACHE_TYPE_DATA: + return sprintf(buf, "Data\n"); + case CACHE_TYPE_INST: + return sprintf(buf, "Instruction\n"); + case CACHE_TYPE_UNIFIED: + return sprintf(buf, "Unified\n"); + default: + return -EINVAL; + } +} + +static ssize_t allocation_policy_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + unsigned int ci_attr = this_leaf->attributes; + int n = 0; + + if ((ci_attr & CACHE_READ_ALLOCATE) && (ci_attr & CACHE_WRITE_ALLOCATE)) + n = sprintf(buf, "ReadWriteAllocate\n"); + else if (ci_attr & CACHE_READ_ALLOCATE) + n = sprintf(buf, "ReadAllocate\n"); + else if (ci_attr & CACHE_WRITE_ALLOCATE) + n = sprintf(buf, "WriteAllocate\n"); + return n; +} + +static ssize_t write_policy_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + unsigned int ci_attr = this_leaf->attributes; + int n = 0; + + if (ci_attr & CACHE_WRITE_THROUGH) + n = sprintf(buf, "WriteThrough\n"); + else if (ci_attr & CACHE_WRITE_BACK) + n = sprintf(buf, "WriteBack\n"); + return n; +} + +static DEVICE_ATTR_RO(level); +static DEVICE_ATTR_RO(type); +static DEVICE_ATTR_RO(coherency_line_size); +static DEVICE_ATTR_RO(ways_of_associativity); +static DEVICE_ATTR_RO(number_of_sets); +static DEVICE_ATTR_RO(size); +static DEVICE_ATTR_RO(allocation_policy); +static DEVICE_ATTR_RO(write_policy); +static DEVICE_ATTR_RO(shared_cpu_map); +static DEVICE_ATTR_RO(shared_cpu_list); +static DEVICE_ATTR_RO(physical_line_partition); + +static struct attribute *cache_default_attrs[] = { + &dev_attr_type.attr, + &dev_attr_level.attr, + &dev_attr_shared_cpu_map.attr, + &dev_attr_shared_cpu_list.attr, + &dev_attr_coherency_line_size.attr, + &dev_attr_ways_of_associativity.attr, + &dev_attr_number_of_sets.attr, + &dev_attr_size.attr, + &dev_attr_allocation_policy.attr, + &dev_attr_write_policy.attr, + &dev_attr_physical_line_partition.attr, + NULL +}; + +static umode_t +cache_default_attrs_is_visible(struct kobject *kobj, + struct attribute *attr, int unused) +{ + struct device *dev = kobj_to_dev(kobj); + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + const struct cpumask *mask = &this_leaf->shared_cpu_map; + umode_t mode = attr->mode; + + if ((attr == &dev_attr_type.attr) && this_leaf->type) + return mode; + if ((attr == &dev_attr_level.attr) && this_leaf->level) + return mode; + if ((attr == &dev_attr_shared_cpu_map.attr) && !cpumask_empty(mask)) + return mode; + if ((attr == &dev_attr_shared_cpu_list.attr) && !cpumask_empty(mask)) + return mode; + if ((attr == &dev_attr_coherency_line_size.attr) && + this_leaf->coherency_line_size) + return mode; + if ((attr == &dev_attr_ways_of_associativity.attr) && + this_leaf->size) /* allow 0 = full associativity */ + return mode; + if ((attr == &dev_attr_number_of_sets.attr) && + this_leaf->number_of_sets) + return mode; + if ((attr == &dev_attr_size.attr) && this_leaf->size) + return mode; + if ((attr == &dev_attr_write_policy.attr) && + (this_leaf->attributes & CACHE_WRITE_POLICY_MASK)) + return mode; + if ((attr == &dev_attr_allocation_policy.attr) && + (this_leaf->attributes & CACHE_ALLOCATE_POLICY_MASK)) + return mode; + if ((attr == &dev_attr_physical_line_partition.attr) && + this_leaf->physical_line_partition) + return mode; + + return 0; +} + +static const struct attribute_group cache_default_group = { + .attrs = cache_default_attrs, + .is_visible = cache_default_attrs_is_visible, +}; + +static const struct attribute_group *cache_default_groups[] = { + &cache_default_group, + NULL, +}; + +static const struct attribute_group *cache_private_groups[] = { + &cache_default_group, + NULL, /* Place holder for private group */ + NULL, +}; + +const struct attribute_group * +__weak cache_get_priv_group(struct cacheinfo *this_leaf) +{ + return NULL; +} + +static const struct attribute_group ** +cache_get_attribute_groups(struct cacheinfo *this_leaf) +{ + const struct attribute_group *priv_group = + cache_get_priv_group(this_leaf); + + if (!priv_group) + return cache_default_groups; + + if (!cache_private_groups[1]) + cache_private_groups[1] = priv_group; + + return cache_private_groups; +} + +/* Add/Remove cache interface for CPU device */ +static void cpu_cache_sysfs_exit(unsigned int cpu) +{ + int i; + struct device *ci_dev; + + if (per_cpu_index_dev(cpu)) { + for (i = 0; i < cache_leaves(cpu); i++) { + ci_dev = per_cache_index_dev(cpu, i); + if (!ci_dev) + continue; + device_unregister(ci_dev); + } + kfree(per_cpu_index_dev(cpu)); + per_cpu_index_dev(cpu) = NULL; + } + device_unregister(per_cpu_cache_dev(cpu)); + per_cpu_cache_dev(cpu) = NULL; +} + +static int cpu_cache_sysfs_init(unsigned int cpu) +{ + struct device *dev = get_cpu_device(cpu); + + if (per_cpu_cacheinfo(cpu) == NULL) + return -ENOENT; + + per_cpu_cache_dev(cpu) = cpu_device_create(dev, NULL, NULL, "cache"); + if (IS_ERR(per_cpu_cache_dev(cpu))) + return PTR_ERR(per_cpu_cache_dev(cpu)); + + /* Allocate all required memory */ + per_cpu_index_dev(cpu) = kcalloc(cache_leaves(cpu), + sizeof(struct device *), GFP_KERNEL); + if (unlikely(per_cpu_index_dev(cpu) == NULL)) + goto err_out; + + return 0; + +err_out: + cpu_cache_sysfs_exit(cpu); + return -ENOMEM; +} + +static int cache_add_dev(unsigned int cpu) +{ + unsigned int i; + int rc; + struct device *ci_dev, *parent; + struct cacheinfo *this_leaf; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + const struct attribute_group **cache_groups; + + rc = cpu_cache_sysfs_init(cpu); + if (unlikely(rc < 0)) + return rc; + + parent = per_cpu_cache_dev(cpu); + for (i = 0; i < cache_leaves(cpu); i++) { + this_leaf = this_cpu_ci->info_list + i; + if (this_leaf->disable_sysfs) + continue; + cache_groups = cache_get_attribute_groups(this_leaf); + ci_dev = cpu_device_create(parent, this_leaf, cache_groups, + "index%1u", i); + if (IS_ERR(ci_dev)) { + rc = PTR_ERR(ci_dev); + goto err; + } + per_cache_index_dev(cpu, i) = ci_dev; + } + cpumask_set_cpu(cpu, &cache_dev_map); + + return 0; +err: + cpu_cache_sysfs_exit(cpu); + return rc; +} + +static void cache_remove_dev(unsigned int cpu) +{ + if (!cpumask_test_cpu(cpu, &cache_dev_map)) + return; + cpumask_clear_cpu(cpu, &cache_dev_map); + + cpu_cache_sysfs_exit(cpu); +} + +static int cacheinfo_cpu_callback(struct notifier_block *nfb, + unsigned long action, void *hcpu) +{ + unsigned int cpu = (unsigned long)hcpu; + int rc = 0; + + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_ONLINE: + rc = detect_cache_attributes(cpu); + if (!rc) + rc = cache_add_dev(cpu); + break; + case CPU_DEAD: + cache_remove_dev(cpu); + if (per_cpu_cacheinfo(cpu)) + free_cache_attributes(cpu); + break; + } + return notifier_from_errno(rc); +} + +static int __init cacheinfo_sysfs_init(void) +{ + int cpu, rc = 0; + + cpu_notifier_register_begin(); + + for_each_online_cpu(cpu) { + rc = detect_cache_attributes(cpu); + if (rc) + goto out; + rc = cache_add_dev(cpu); + if (rc) { + free_cache_attributes(cpu); + pr_err("error populating cacheinfo..cpu%d\n", cpu); + goto out; + } + } + __hotcpu_notifier(cacheinfo_cpu_callback, 0); + +out: + cpu_notifier_register_done(); + return rc; +} + +device_initcall(cacheinfo_sysfs_init); diff --git a/drivers/base/core.c b/drivers/base/core.c index 842d04707de..97e2baf6e5d 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1021,18 +1021,6 @@ int device_add(struct device *dev) if (error) goto attrError; - if (MAJOR(dev->devt)) { - error = device_create_file(dev, &dev_attr_dev); - if (error) - goto ueventattrError; - - error = device_create_sys_dev_entry(dev); - if (error) - goto devtattrError; - - devtmpfs_create_node(dev); - } - error = device_add_class_symlinks(dev); if (error) goto SymlinkError; @@ -1047,6 +1035,18 @@ int device_add(struct device *dev) goto DPMError; device_pm_add(dev); + if (MAJOR(dev->devt)) { + error = device_create_file(dev, &dev_attr_dev); + if (error) + goto DevAttrError; + + error = device_create_sys_dev_entry(dev); + if (error) + goto SysEntryError; + + devtmpfs_create_node(dev); + } + /* Notify clients of device addition. This call must come * after dpm_sysfs_add() and before kobject_uevent(). */ @@ -1076,6 +1076,12 @@ int device_add(struct device *dev) done: put_device(dev); return error; + SysEntryError: + if (MAJOR(dev->devt)) + device_remove_file(dev, &dev_attr_dev); + DevAttrError: + device_pm_remove(dev); + dpm_sysfs_remove(dev); DPMError: bus_remove_device(dev); BusError: @@ -1083,14 +1089,6 @@ done: AttrsError: device_remove_class_symlinks(dev); SymlinkError: - if (MAJOR(dev->devt)) - devtmpfs_delete_node(dev); - if (MAJOR(dev->devt)) - device_remove_sys_dev_entry(dev); - devtattrError: - if (MAJOR(dev->devt)) - device_remove_file(dev, &dev_attr_dev); - ueventattrError: device_remove_file(dev, &dev_attr_uevent); attrError: kobject_uevent(&dev->kobj, KOBJ_REMOVE); diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 006b1bc5297..f829a4c7174 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -207,11 +207,8 @@ static ssize_t show_cpus_attr(struct device *dev, char *buf) { struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr); - int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *(ca->map)); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_print_to_pagebuf(true, buf, *ca->map); } #define _CPU_ATTR(name, map) \ @@ -366,6 +363,60 @@ struct device *get_cpu_device(unsigned cpu) } EXPORT_SYMBOL_GPL(get_cpu_device); +static void device_create_release(struct device *dev) +{ + kfree(dev); +} + +static struct device * +__cpu_device_create(struct device *parent, void *drvdata, + const struct attribute_group **groups, + const char *fmt, va_list args) +{ + struct device *dev = NULL; + int retval = -ENODEV; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + retval = -ENOMEM; + goto error; + } + + device_initialize(dev); + dev->parent = parent; + dev->groups = groups; + dev->release = device_create_release; + dev_set_drvdata(dev, drvdata); + + retval = kobject_set_name_vargs(&dev->kobj, fmt, args); + if (retval) + goto error; + + retval = device_add(dev); + if (retval) + goto error; + + return dev; + +error: + put_device(dev); + return ERR_PTR(retval); +} + +struct device *cpu_device_create(struct device *parent, void *drvdata, + const struct attribute_group **groups, + const char *fmt, ...) +{ + va_list vargs; + struct device *dev; + + va_start(vargs, fmt); + dev = __cpu_device_create(parent, drvdata, groups, fmt, vargs); + va_end(vargs); + return dev; +} +EXPORT_SYMBOL_GPL(cpu_device_create); + #ifdef CONFIG_GENERIC_CPU_AUTOPROBE static DEVICE_ATTR(modalias, 0444, print_cpu_modalias, NULL); #endif diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c index 96614b04544..1bd120a0b08 100644 --- a/drivers/base/devcoredump.c +++ b/drivers/base/devcoredump.c @@ -31,6 +31,11 @@ #include <linux/fs.h> #include <linux/workqueue.h> +static struct class devcd_class; + +/* global disable flag, for security purposes */ +static bool devcd_disabled; + /* if data isn't read by userspace after 5 minutes then delete it */ #define DEVCD_TIMEOUT (HZ * 60 * 5) @@ -121,11 +126,51 @@ static const struct attribute_group *devcd_dev_groups[] = { &devcd_dev_group, NULL, }; +static int devcd_free(struct device *dev, void *data) +{ + struct devcd_entry *devcd = dev_to_devcd(dev); + + flush_delayed_work(&devcd->del_wk); + return 0; +} + +static ssize_t disabled_show(struct class *class, struct class_attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", devcd_disabled); +} + +static ssize_t disabled_store(struct class *class, struct class_attribute *attr, + const char *buf, size_t count) +{ + long tmp = simple_strtol(buf, NULL, 10); + + /* + * This essentially makes the attribute write-once, since you can't + * go back to not having it disabled. This is intentional, it serves + * as a system lockdown feature. + */ + if (tmp != 1) + return -EINVAL; + + devcd_disabled = true; + + class_for_each_device(&devcd_class, NULL, NULL, devcd_free); + + return count; +} + +static struct class_attribute devcd_class_attrs[] = { + __ATTR_RW(disabled), + __ATTR_NULL +}; + static struct class devcd_class = { .name = "devcoredump", .owner = THIS_MODULE, .dev_release = devcd_dev_release, .dev_groups = devcd_dev_groups, + .class_attrs = devcd_class_attrs, }; static ssize_t devcd_readv(char *buffer, loff_t offset, size_t count, @@ -192,6 +237,9 @@ void dev_coredumpm(struct device *dev, struct module *owner, struct devcd_entry *devcd; struct device *existing; + if (devcd_disabled) + goto free; + existing = class_find_device(&devcd_class, NULL, dev, devcd_match_failing); if (existing) { @@ -249,14 +297,6 @@ static int __init devcoredump_init(void) } __initcall(devcoredump_init); -static int devcd_free(struct device *dev, void *data) -{ - struct devcd_entry *devcd = dev_to_devcd(dev); - - flush_delayed_work(&devcd->del_wk); - return 0; -} - static void __exit devcoredump_exit(void) { class_for_each_device(&devcd_class, NULL, NULL, devcd_free); diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 3d785ebb48d..58470c39530 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -591,8 +591,7 @@ static int fw_map_pages_buf(struct firmware_buf *buf) if (!buf->is_paged_buf) return 0; - if (buf->data) - vunmap(buf->data); + vunmap(buf->data); buf->data = vmap(buf->pages, buf->nr_pages, 0, PAGE_KERNEL_RO); if (!buf->data) return -ENOMEM; @@ -925,7 +924,7 @@ static int _request_firmware_load(struct firmware_priv *fw_priv, kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD); } - wait_for_completion(&buf->completion); + retval = wait_for_completion_interruptible(&buf->completion); cancel_delayed_work_sync(&fw_priv->timeout_work); if (is_fw_load_aborted(buf)) @@ -1004,7 +1003,7 @@ static int sync_cached_firmware_buf(struct firmware_buf *buf) break; } mutex_unlock(&fw_lock); - wait_for_completion(&buf->completion); + ret = wait_for_completion_interruptible(&buf->completion); mutex_lock(&fw_lock); } mutex_unlock(&fw_lock); diff --git a/drivers/base/node.c b/drivers/base/node.c index 472168cd0c9..a3b82e9c7f2 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -25,32 +25,26 @@ static struct bus_type node_subsys = { }; -static ssize_t node_read_cpumap(struct device *dev, int type, char *buf) +static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf) { struct node *node_dev = to_node(dev); const struct cpumask *mask = cpumask_of_node(node_dev->dev.id); - int len; /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); - len = type? - cpulist_scnprintf(buf, PAGE_SIZE-2, mask) : - cpumask_scnprintf(buf, PAGE_SIZE-2, mask); - buf[len++] = '\n'; - buf[len] = '\0'; - return len; + return cpumap_print_to_pagebuf(list, buf, mask); } static inline ssize_t node_read_cpumask(struct device *dev, struct device_attribute *attr, char *buf) { - return node_read_cpumap(dev, 0, buf); + return node_read_cpumap(dev, false, buf); } static inline ssize_t node_read_cpulist(struct device *dev, struct device_attribute *attr, char *buf) { - return node_read_cpumap(dev, 1, buf); + return node_read_cpumap(dev, true, buf); } static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 233ececd15a..9421fed4090 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -580,9 +580,10 @@ void platform_driver_unregister(struct platform_driver *drv) EXPORT_SYMBOL_GPL(platform_driver_unregister); /** - * platform_driver_probe - register driver for non-hotpluggable device + * __platform_driver_probe - register driver for non-hotpluggable device * @drv: platform driver structure * @probe: the driver probe routine, probably from an __init section + * @module: module which will be the owner of the driver * * Use this instead of platform_driver_register() when you know the device * is not hotpluggable and has already been registered, and you want to @@ -598,8 +599,8 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister); * Returns zero if the driver registered and bound to a device, else returns * a negative error code and with the driver not registered. */ -int __init_or_module platform_driver_probe(struct platform_driver *drv, - int (*probe)(struct platform_device *)) +int __init_or_module __platform_driver_probe(struct platform_driver *drv, + int (*probe)(struct platform_device *), struct module *module) { int retval, code; @@ -614,7 +615,7 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv, /* temporary section violation during probe() */ drv->probe = probe; - retval = code = platform_driver_register(drv); + retval = code = __platform_driver_register(drv, module); /* * Fixup that section violation, being paranoid about code scanning @@ -633,27 +634,28 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv, platform_driver_unregister(drv); return retval; } -EXPORT_SYMBOL_GPL(platform_driver_probe); +EXPORT_SYMBOL_GPL(__platform_driver_probe); /** - * platform_create_bundle - register driver and create corresponding device + * __platform_create_bundle - register driver and create corresponding device * @driver: platform driver structure * @probe: the driver probe routine, probably from an __init section * @res: set of resources that needs to be allocated for the device * @n_res: number of resources * @data: platform specific data for this platform device * @size: size of platform specific data + * @module: module which will be the owner of the driver * * Use this in legacy-style modules that probe hardware directly and * register a single platform device and corresponding platform driver. * * Returns &struct platform_device pointer on success, or ERR_PTR() on error. */ -struct platform_device * __init_or_module platform_create_bundle( +struct platform_device * __init_or_module __platform_create_bundle( struct platform_driver *driver, int (*probe)(struct platform_device *), struct resource *res, unsigned int n_res, - const void *data, size_t size) + const void *data, size_t size, struct module *module) { struct platform_device *pdev; int error; @@ -676,7 +678,7 @@ struct platform_device * __init_or_module platform_create_bundle( if (error) goto err_pdev_put; - error = platform_driver_probe(driver, probe); + error = __platform_driver_probe(driver, probe, module); if (error) goto err_pdev_del; @@ -689,7 +691,7 @@ err_pdev_put: err_out: return ERR_PTR(error); } -EXPORT_SYMBOL_GPL(platform_create_bundle); +EXPORT_SYMBOL_GPL(__platform_create_bundle); /* modalias support enables more hands-off userspace setup: * (a) environment variable lets new-style hotplug events work once system is diff --git a/drivers/base/topology.c b/drivers/base/topology.c index be7c1fb7c0c..6491f45200a 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -29,75 +29,52 @@ #include <linux/hardirq.h> #include <linux/topology.h> -#define define_one_ro_named(_name, _func) \ - static DEVICE_ATTR(_name, 0444, _func, NULL) - -#define define_one_ro(_name) \ - static DEVICE_ATTR(_name, 0444, show_##_name, NULL) - #define define_id_show_func(name) \ -static ssize_t show_##name(struct device *dev, \ +static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ return sprintf(buf, "%d\n", topology_##name(dev->id)); \ } -#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \ - defined(topology_book_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; - - if (len > 1) { - n = type? - cpulist_scnprintf(buf, len-2, mask) : - cpumask_scnprintf(buf, len-2, mask); - buf[n++] = '\n'; - buf[n] = '\0'; - } - return n; -} -#endif - -#define define_siblings_show_map(name) \ -static ssize_t show_##name(struct device *dev, \ +#define define_siblings_show_map(name, mask) \ +static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ - return show_cpumap(0, topology_##name(dev->id), buf); \ + return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\ } -#define define_siblings_show_list(name) \ -static ssize_t show_##name##_list(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ +#define define_siblings_show_list(name, mask) \ +static ssize_t name##_list_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ { \ - return show_cpumap(1, topology_##name(dev->id), buf); \ + return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\ } -#define define_siblings_show_func(name) \ - define_siblings_show_map(name); define_siblings_show_list(name) +#define define_siblings_show_func(name, mask) \ + define_siblings_show_map(name, mask); \ + define_siblings_show_list(name, mask) define_id_show_func(physical_package_id); -define_one_ro(physical_package_id); +static DEVICE_ATTR_RO(physical_package_id); define_id_show_func(core_id); -define_one_ro(core_id); +static DEVICE_ATTR_RO(core_id); -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(thread_siblings, thread_cpumask); +static DEVICE_ATTR_RO(thread_siblings); +static DEVICE_ATTR_RO(thread_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); +define_siblings_show_func(core_siblings, core_cpumask); +static DEVICE_ATTR_RO(core_siblings); +static DEVICE_ATTR_RO(core_siblings_list); #ifdef CONFIG_SCHED_BOOK define_id_show_func(book_id); -define_one_ro(book_id); -define_siblings_show_func(book_cpumask); -define_one_ro_named(book_siblings, show_book_cpumask); -define_one_ro_named(book_siblings_list, show_book_cpumask_list); +static DEVICE_ATTR_RO(book_id); +define_siblings_show_func(book_siblings, book_cpumask); +static DEVICE_ATTR_RO(book_siblings); +static DEVICE_ATTR_RO(book_siblings_list); #endif static struct attribute *default_attrs[] = { |