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-rw-r--r--drivers/base/Kconfig51
-rw-r--r--drivers/base/attribute_container.c1
-rw-r--r--drivers/base/bus.c27
-rw-r--r--drivers/base/class.c18
-rw-r--r--drivers/base/core.c52
-rw-r--r--drivers/base/cpu.c106
-rw-r--r--drivers/base/dd.c38
-rw-r--r--drivers/base/devres.c1
-rw-r--r--drivers/base/devtmpfs.c14
-rw-r--r--drivers/base/dma-coherent.c1
-rw-r--r--drivers/base/dma-mapping.c1
-rw-r--r--drivers/base/driver.c1
-rw-r--r--drivers/base/firmware_class.c14
-rw-r--r--drivers/base/memory.c38
-rw-r--r--drivers/base/module.c1
-rw-r--r--drivers/base/node.c89
-rw-r--r--drivers/base/platform.c109
-rw-r--r--drivers/base/power/Makefile1
-rw-r--r--drivers/base/power/generic_ops.c233
-rw-r--r--drivers/base/power/main.c51
-rw-r--r--drivers/base/sys.c18
21 files changed, 628 insertions, 237 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index ee377270beb9..fd52c48ee762 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -3,35 +3,50 @@ menu "Generic Driver Options"
3config UEVENT_HELPER_PATH 3config UEVENT_HELPER_PATH
4 string "path to uevent helper" 4 string "path to uevent helper"
5 depends on HOTPLUG 5 depends on HOTPLUG
6 default "/sbin/hotplug" 6 default ""
7 help 7 help
8 Path to uevent helper program forked by the kernel for 8 Path to uevent helper program forked by the kernel for
9 every uevent. 9 every uevent.
10 Before the switch to the netlink-based uevent source, this was
11 used to hook hotplug scripts into kernel device events. It
12 usually pointed to a shell script at /sbin/hotplug.
13 This should not be used today, because usual systems create
14 many events at bootup or device discovery in a very short time
15 frame. One forked process per event can create so many processes
16 that it creates a high system load, or on smaller systems
17 it is known to create out-of-memory situations during bootup.
10 18
11config DEVTMPFS 19config DEVTMPFS
12 bool "Create a kernel maintained /dev tmpfs (EXPERIMENTAL)" 20 bool "Maintain a devtmpfs filesystem to mount at /dev"
13 depends on HOTPLUG && SHMEM && TMPFS 21 depends on HOTPLUG && SHMEM && TMPFS
14 help 22 help
15 This creates a tmpfs filesystem, and mounts it at bootup 23 This creates a tmpfs filesystem instance early at bootup.
16 and mounts it at /dev. The kernel driver core creates device 24 In this filesystem, the kernel driver core maintains device
17 nodes for all registered devices in that filesystem. All device 25 nodes with their default names and permissions for all
18 nodes are owned by root and have the default mode of 0600. 26 registered devices with an assigned major/minor number.
19 Userspace can add and delete the nodes as needed. This is 27 Userspace can modify the filesystem content as needed, add
20 intended to simplify bootup, and make it possible to delay 28 symlinks, and apply needed permissions.
21 the initial coldplug at bootup done by udev in userspace. 29 It provides a fully functional /dev directory, where usually
22 It should also provide a simpler way for rescue systems 30 udev runs on top, managing permissions and adding meaningful
23 to bring up a kernel with dynamic major/minor numbers. 31 symlinks.
24 Meaningful symlinks, permissions and device ownership must 32 In very limited environments, it may provide a sufficient
25 still be handled by userspace. 33 functional /dev without any further help. It also allows simple
26 If unsure, say N here. 34 rescue systems, and reliably handles dynamic major/minor numbers.
27 35
28config DEVTMPFS_MOUNT 36config DEVTMPFS_MOUNT
29 bool "Automount devtmpfs at /dev" 37 bool "Automount devtmpfs at /dev, after the kernel mounted the rootfs"
30 depends on DEVTMPFS 38 depends on DEVTMPFS
31 help 39 help
32 This will mount devtmpfs at /dev if the kernel mounts the root 40 This will instruct the kernel to automatically mount the
33 filesystem. It will not affect initramfs based mounting. 41 devtmpfs filesystem at /dev, directly after the kernel has
34 If unsure, say N here. 42 mounted the root filesystem. The behavior can be overridden
43 with the commandline parameter: devtmpfs.mount=0|1.
44 This option does not affect initramfs based booting, here
45 the devtmpfs filesystem always needs to be mounted manually
46 after the roots is mounted.
47 With this option enabled, it allows to bring up a system in
48 rescue mode with init=/bin/sh, even when the /dev directory
49 on the rootfs is completely empty.
35 50
36config STANDALONE 51config STANDALONE
37 bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL 52 bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL
diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index b9cda053d3c0..8fc200b2e2c0 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -328,6 +328,7 @@ attribute_container_add_attrs(struct device *classdev)
328 return sysfs_create_group(&classdev->kobj, cont->grp); 328 return sysfs_create_group(&classdev->kobj, cont->grp);
329 329
330 for (i = 0; attrs[i]; i++) { 330 for (i = 0; attrs[i]; i++) {
331 sysfs_attr_init(&attrs[i]->attr);
331 error = device_create_file(classdev, attrs[i]); 332 error = device_create_file(classdev, attrs[i]);
332 if (error) 333 if (error)
333 return error; 334 return error;
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index c0c5a43d9fb3..12eec3f633b1 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -13,6 +13,7 @@
13#include <linux/device.h> 13#include <linux/device.h>
14#include <linux/module.h> 14#include <linux/module.h>
15#include <linux/errno.h> 15#include <linux/errno.h>
16#include <linux/slab.h>
16#include <linux/init.h> 17#include <linux/init.h>
17#include <linux/string.h> 18#include <linux/string.h>
18#include "base.h" 19#include "base.h"
@@ -70,7 +71,7 @@ static ssize_t drv_attr_store(struct kobject *kobj, struct attribute *attr,
70 return ret; 71 return ret;
71} 72}
72 73
73static struct sysfs_ops driver_sysfs_ops = { 74static const struct sysfs_ops driver_sysfs_ops = {
74 .show = drv_attr_show, 75 .show = drv_attr_show,
75 .store = drv_attr_store, 76 .store = drv_attr_store,
76}; 77};
@@ -115,7 +116,7 @@ static ssize_t bus_attr_store(struct kobject *kobj, struct attribute *attr,
115 return ret; 116 return ret;
116} 117}
117 118
118static struct sysfs_ops bus_sysfs_ops = { 119static const struct sysfs_ops bus_sysfs_ops = {
119 .show = bus_attr_show, 120 .show = bus_attr_show,
120 .store = bus_attr_store, 121 .store = bus_attr_store,
121}; 122};
@@ -154,7 +155,7 @@ static int bus_uevent_filter(struct kset *kset, struct kobject *kobj)
154 return 0; 155 return 0;
155} 156}
156 157
157static struct kset_uevent_ops bus_uevent_ops = { 158static const struct kset_uevent_ops bus_uevent_ops = {
158 .filter = bus_uevent_filter, 159 .filter = bus_uevent_filter,
159}; 160};
160 161
@@ -173,10 +174,10 @@ static ssize_t driver_unbind(struct device_driver *drv,
173 dev = bus_find_device_by_name(bus, NULL, buf); 174 dev = bus_find_device_by_name(bus, NULL, buf);
174 if (dev && dev->driver == drv) { 175 if (dev && dev->driver == drv) {
175 if (dev->parent) /* Needed for USB */ 176 if (dev->parent) /* Needed for USB */
176 down(&dev->parent->sem); 177 device_lock(dev->parent);
177 device_release_driver(dev); 178 device_release_driver(dev);
178 if (dev->parent) 179 if (dev->parent)
179 up(&dev->parent->sem); 180 device_unlock(dev->parent);
180 err = count; 181 err = count;
181 } 182 }
182 put_device(dev); 183 put_device(dev);
@@ -200,12 +201,12 @@ static ssize_t driver_bind(struct device_driver *drv,
200 dev = bus_find_device_by_name(bus, NULL, buf); 201 dev = bus_find_device_by_name(bus, NULL, buf);
201 if (dev && dev->driver == NULL && driver_match_device(drv, dev)) { 202 if (dev && dev->driver == NULL && driver_match_device(drv, dev)) {
202 if (dev->parent) /* Needed for USB */ 203 if (dev->parent) /* Needed for USB */
203 down(&dev->parent->sem); 204 device_lock(dev->parent);
204 down(&dev->sem); 205 device_lock(dev);
205 err = driver_probe_device(drv, dev); 206 err = driver_probe_device(drv, dev);
206 up(&dev->sem); 207 device_unlock(dev);
207 if (dev->parent) 208 if (dev->parent)
208 up(&dev->parent->sem); 209 device_unlock(dev->parent);
209 210
210 if (err > 0) { 211 if (err > 0) {
211 /* success */ 212 /* success */
@@ -744,10 +745,10 @@ static int __must_check bus_rescan_devices_helper(struct device *dev,
744 745
745 if (!dev->driver) { 746 if (!dev->driver) {
746 if (dev->parent) /* Needed for USB */ 747 if (dev->parent) /* Needed for USB */
747 down(&dev->parent->sem); 748 device_lock(dev->parent);
748 ret = device_attach(dev); 749 ret = device_attach(dev);
749 if (dev->parent) 750 if (dev->parent)
750 up(&dev->parent->sem); 751 device_unlock(dev->parent);
751 } 752 }
752 return ret < 0 ? ret : 0; 753 return ret < 0 ? ret : 0;
753} 754}
@@ -779,10 +780,10 @@ int device_reprobe(struct device *dev)
779{ 780{
780 if (dev->driver) { 781 if (dev->driver) {
781 if (dev->parent) /* Needed for USB */ 782 if (dev->parent) /* Needed for USB */
782 down(&dev->parent->sem); 783 device_lock(dev->parent);
783 device_release_driver(dev); 784 device_release_driver(dev);
784 if (dev->parent) 785 if (dev->parent)
785 up(&dev->parent->sem); 786 device_unlock(dev->parent);
786 } 787 }
787 return bus_rescan_devices_helper(dev, NULL); 788 return bus_rescan_devices_helper(dev, NULL);
788} 789}
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 6e2c3b064f53..9c6a0d6408e7 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -31,7 +31,7 @@ static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr,
31 ssize_t ret = -EIO; 31 ssize_t ret = -EIO;
32 32
33 if (class_attr->show) 33 if (class_attr->show)
34 ret = class_attr->show(cp->class, buf); 34 ret = class_attr->show(cp->class, class_attr, buf);
35 return ret; 35 return ret;
36} 36}
37 37
@@ -43,7 +43,7 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
43 ssize_t ret = -EIO; 43 ssize_t ret = -EIO;
44 44
45 if (class_attr->store) 45 if (class_attr->store)
46 ret = class_attr->store(cp->class, buf, count); 46 ret = class_attr->store(cp->class, class_attr, buf, count);
47 return ret; 47 return ret;
48} 48}
49 49
@@ -63,7 +63,7 @@ static void class_release(struct kobject *kobj)
63 kfree(cp); 63 kfree(cp);
64} 64}
65 65
66static struct sysfs_ops class_sysfs_ops = { 66static const struct sysfs_ops class_sysfs_ops = {
67 .show = class_attr_show, 67 .show = class_attr_show,
68 .store = class_attr_store, 68 .store = class_attr_store,
69}; 69};
@@ -219,6 +219,8 @@ static void class_create_release(struct class *cls)
219 * This is used to create a struct class pointer that can then be used 219 * This is used to create a struct class pointer that can then be used
220 * in calls to device_create(). 220 * in calls to device_create().
221 * 221 *
222 * Returns &struct class pointer on success, or ERR_PTR() on error.
223 *
222 * Note, the pointer created here is to be destroyed when finished by 224 * Note, the pointer created here is to be destroyed when finished by
223 * making a call to class_destroy(). 225 * making a call to class_destroy().
224 */ 226 */
@@ -490,6 +492,16 @@ void class_interface_unregister(struct class_interface *class_intf)
490 class_put(parent); 492 class_put(parent);
491} 493}
492 494
495ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
496 char *buf)
497{
498 struct class_attribute_string *cs;
499 cs = container_of(attr, struct class_attribute_string, attr);
500 return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
501}
502
503EXPORT_SYMBOL_GPL(show_class_attr_string);
504
493struct class_compat { 505struct class_compat {
494 struct kobject *kobj; 506 struct kobject *kobj;
495}; 507};
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 282025770429..b56a0ba31d4a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -100,7 +100,7 @@ static ssize_t dev_attr_store(struct kobject *kobj, struct attribute *attr,
100 return ret; 100 return ret;
101} 101}
102 102
103static struct sysfs_ops dev_sysfs_ops = { 103static const struct sysfs_ops dev_sysfs_ops = {
104 .show = dev_attr_show, 104 .show = dev_attr_show,
105 .store = dev_attr_store, 105 .store = dev_attr_store,
106}; 106};
@@ -252,7 +252,7 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
252 return retval; 252 return retval;
253} 253}
254 254
255static struct kset_uevent_ops device_uevent_ops = { 255static const struct kset_uevent_ops device_uevent_ops = {
256 .filter = dev_uevent_filter, 256 .filter = dev_uevent_filter,
257 .name = dev_uevent_name, 257 .name = dev_uevent_name,
258 .uevent = dev_uevent, 258 .uevent = dev_uevent,
@@ -306,15 +306,10 @@ static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
306{ 306{
307 enum kobject_action action; 307 enum kobject_action action;
308 308
309 if (kobject_action_type(buf, count, &action) == 0) { 309 if (kobject_action_type(buf, count, &action) == 0)
310 kobject_uevent(&dev->kobj, action); 310 kobject_uevent(&dev->kobj, action);
311 goto out; 311 else
312 } 312 dev_err(dev, "uevent: unknown action-string\n");
313
314 dev_err(dev, "uevent: unsupported action-string; this will "
315 "be ignored in a future kernel version\n");
316 kobject_uevent(&dev->kobj, KOBJ_ADD);
317out:
318 return count; 313 return count;
319} 314}
320 315
@@ -607,6 +602,7 @@ static struct kobject *get_device_parent(struct device *dev,
607 int retval; 602 int retval;
608 603
609 if (dev->class) { 604 if (dev->class) {
605 static DEFINE_MUTEX(gdp_mutex);
610 struct kobject *kobj = NULL; 606 struct kobject *kobj = NULL;
611 struct kobject *parent_kobj; 607 struct kobject *parent_kobj;
612 struct kobject *k; 608 struct kobject *k;
@@ -623,6 +619,8 @@ static struct kobject *get_device_parent(struct device *dev,
623 else 619 else
624 parent_kobj = &parent->kobj; 620 parent_kobj = &parent->kobj;
625 621
622 mutex_lock(&gdp_mutex);
623
626 /* find our class-directory at the parent and reference it */ 624 /* find our class-directory at the parent and reference it */
627 spin_lock(&dev->class->p->class_dirs.list_lock); 625 spin_lock(&dev->class->p->class_dirs.list_lock);
628 list_for_each_entry(k, &dev->class->p->class_dirs.list, entry) 626 list_for_each_entry(k, &dev->class->p->class_dirs.list, entry)
@@ -631,20 +629,26 @@ static struct kobject *get_device_parent(struct device *dev,
631 break; 629 break;
632 } 630 }
633 spin_unlock(&dev->class->p->class_dirs.list_lock); 631 spin_unlock(&dev->class->p->class_dirs.list_lock);
634 if (kobj) 632 if (kobj) {
633 mutex_unlock(&gdp_mutex);
635 return kobj; 634 return kobj;
635 }
636 636
637 /* or create a new class-directory at the parent device */ 637 /* or create a new class-directory at the parent device */
638 k = kobject_create(); 638 k = kobject_create();
639 if (!k) 639 if (!k) {
640 mutex_unlock(&gdp_mutex);
640 return NULL; 641 return NULL;
642 }
641 k->kset = &dev->class->p->class_dirs; 643 k->kset = &dev->class->p->class_dirs;
642 retval = kobject_add(k, parent_kobj, "%s", dev->class->name); 644 retval = kobject_add(k, parent_kobj, "%s", dev->class->name);
643 if (retval < 0) { 645 if (retval < 0) {
646 mutex_unlock(&gdp_mutex);
644 kobject_put(k); 647 kobject_put(k);
645 return NULL; 648 return NULL;
646 } 649 }
647 /* do not emit an uevent for this simple "glue" directory */ 650 /* do not emit an uevent for this simple "glue" directory */
651 mutex_unlock(&gdp_mutex);
648 return k; 652 return k;
649 } 653 }
650 654
@@ -1341,6 +1345,8 @@ static void root_device_release(struct device *dev)
1341 * 'module' symlink which points to the @owner directory 1345 * 'module' symlink which points to the @owner directory
1342 * in sysfs. 1346 * in sysfs.
1343 * 1347 *
1348 * Returns &struct device pointer on success, or ERR_PTR() on error.
1349 *
1344 * Note: You probably want to use root_device_register(). 1350 * Note: You probably want to use root_device_register().
1345 */ 1351 */
1346struct device *__root_device_register(const char *name, struct module *owner) 1352struct device *__root_device_register(const char *name, struct module *owner)
@@ -1428,6 +1434,8 @@ static void device_create_release(struct device *dev)
1428 * Any further sysfs files that might be required can be created using this 1434 * Any further sysfs files that might be required can be created using this
1429 * pointer. 1435 * pointer.
1430 * 1436 *
1437 * Returns &struct device pointer on success, or ERR_PTR() on error.
1438 *
1431 * Note: the struct class passed to this function must have previously 1439 * Note: the struct class passed to this function must have previously
1432 * been created with a call to class_create(). 1440 * been created with a call to class_create().
1433 */ 1441 */
@@ -1488,6 +1496,8 @@ EXPORT_SYMBOL_GPL(device_create_vargs);
1488 * Any further sysfs files that might be required can be created using this 1496 * Any further sysfs files that might be required can be created using this
1489 * pointer. 1497 * pointer.
1490 * 1498 *
1499 * Returns &struct device pointer on success, or ERR_PTR() on error.
1500 *
1491 * Note: the struct class passed to this function must have previously 1501 * Note: the struct class passed to this function must have previously
1492 * been created with a call to class_create(). 1502 * been created with a call to class_create().
1493 */ 1503 */
@@ -1574,22 +1584,16 @@ int device_rename(struct device *dev, char *new_name)
1574 if (old_class_name) { 1584 if (old_class_name) {
1575 new_class_name = make_class_name(dev->class->name, &dev->kobj); 1585 new_class_name = make_class_name(dev->class->name, &dev->kobj);
1576 if (new_class_name) { 1586 if (new_class_name) {
1577 error = sysfs_create_link_nowarn(&dev->parent->kobj, 1587 error = sysfs_rename_link(&dev->parent->kobj,
1578 &dev->kobj, 1588 &dev->kobj,
1579 new_class_name); 1589 old_class_name,
1580 if (error) 1590 new_class_name);
1581 goto out;
1582 sysfs_remove_link(&dev->parent->kobj, old_class_name);
1583 } 1591 }
1584 } 1592 }
1585#else 1593#else
1586 if (dev->class) { 1594 if (dev->class) {
1587 error = sysfs_create_link_nowarn(&dev->class->p->class_subsys.kobj, 1595 error = sysfs_rename_link(&dev->class->p->class_subsys.kobj,
1588 &dev->kobj, dev_name(dev)); 1596 &dev->kobj, old_device_name, new_name);
1589 if (error)
1590 goto out;
1591 sysfs_remove_link(&dev->class->p->class_subsys.kobj,
1592 old_device_name);
1593 } 1597 }
1594#endif 1598#endif
1595 1599
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 958bd1540c30..f35719aab3c1 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -10,11 +10,15 @@
10#include <linux/topology.h> 10#include <linux/topology.h>
11#include <linux/device.h> 11#include <linux/device.h>
12#include <linux/node.h> 12#include <linux/node.h>
13#include <linux/gfp.h>
13 14
14#include "base.h" 15#include "base.h"
15 16
17static struct sysdev_class_attribute *cpu_sysdev_class_attrs[];
18
16struct sysdev_class cpu_sysdev_class = { 19struct sysdev_class cpu_sysdev_class = {
17 .name = "cpu", 20 .name = "cpu",
21 .attrs = cpu_sysdev_class_attrs,
18}; 22};
19EXPORT_SYMBOL(cpu_sysdev_class); 23EXPORT_SYMBOL(cpu_sysdev_class);
20 24
@@ -76,34 +80,24 @@ void unregister_cpu(struct cpu *cpu)
76} 80}
77 81
78#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 82#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
79static ssize_t cpu_probe_store(struct class *class, const char *buf, 83static ssize_t cpu_probe_store(struct sysdev_class *class,
84 struct sysdev_class_attribute *attr,
85 const char *buf,
80 size_t count) 86 size_t count)
81{ 87{
82 return arch_cpu_probe(buf, count); 88 return arch_cpu_probe(buf, count);
83} 89}
84 90
85static ssize_t cpu_release_store(struct class *class, const char *buf, 91static ssize_t cpu_release_store(struct sysdev_class *class,
92 struct sysdev_class_attribute *attr,
93 const char *buf,
86 size_t count) 94 size_t count)
87{ 95{
88 return arch_cpu_release(buf, count); 96 return arch_cpu_release(buf, count);
89} 97}
90 98
91static CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store); 99static SYSDEV_CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
92static CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store); 100static SYSDEV_CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
93
94int __init cpu_probe_release_init(void)
95{
96 int rc;
97
98 rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
99 &class_attr_probe.attr);
100 if (!rc)
101 rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
102 &class_attr_release.attr);
103
104 return rc;
105}
106device_initcall(cpu_probe_release_init);
107#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ 101#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
108 102
109#else /* ... !CONFIG_HOTPLUG_CPU */ 103#else /* ... !CONFIG_HOTPLUG_CPU */
@@ -141,31 +135,39 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
141/* 135/*
142 * Print cpu online, possible, present, and system maps 136 * Print cpu online, possible, present, and system maps
143 */ 137 */
144static ssize_t print_cpus_map(char *buf, const struct cpumask *map) 138
139struct cpu_attr {
140 struct sysdev_class_attribute attr;
141 const struct cpumask *const * const map;
142};
143
144static ssize_t show_cpus_attr(struct sysdev_class *class,
145 struct sysdev_class_attribute *attr,
146 char *buf)
145{ 147{
146 int n = cpulist_scnprintf(buf, PAGE_SIZE-2, map); 148 struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);
149 int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *(ca->map));
147 150
148 buf[n++] = '\n'; 151 buf[n++] = '\n';
149 buf[n] = '\0'; 152 buf[n] = '\0';
150 return n; 153 return n;
151} 154}
152 155
153#define print_cpus_func(type) \ 156#define _CPU_ATTR(name, map) \
154static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \ 157 { _SYSDEV_CLASS_ATTR(name, 0444, show_cpus_attr, NULL), map }
155{ \
156 return print_cpus_map(buf, cpu_##type##_mask); \
157} \
158static struct sysdev_class_attribute attr_##type##_map = \
159 _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
160 158
161print_cpus_func(online); 159/* Keep in sync with cpu_sysdev_class_attrs */
162print_cpus_func(possible); 160static struct cpu_attr cpu_attrs[] = {
163print_cpus_func(present); 161 _CPU_ATTR(online, &cpu_online_mask),
162 _CPU_ATTR(possible, &cpu_possible_mask),
163 _CPU_ATTR(present, &cpu_present_mask),
164};
164 165
165/* 166/*
166 * Print values for NR_CPUS and offlined cpus 167 * Print values for NR_CPUS and offlined cpus
167 */ 168 */
168static ssize_t print_cpus_kernel_max(struct sysdev_class *class, char *buf) 169static ssize_t print_cpus_kernel_max(struct sysdev_class *class,
170 struct sysdev_class_attribute *attr, char *buf)
169{ 171{
170 int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1); 172 int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
171 return n; 173 return n;
@@ -175,7 +177,8 @@ static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
175/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */ 177/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
176unsigned int total_cpus; 178unsigned int total_cpus;
177 179
178static ssize_t print_cpus_offline(struct sysdev_class *class, char *buf) 180static ssize_t print_cpus_offline(struct sysdev_class *class,
181 struct sysdev_class_attribute *attr, char *buf)
179{ 182{
180 int n = 0, len = PAGE_SIZE-2; 183 int n = 0, len = PAGE_SIZE-2;
181 cpumask_var_t offline; 184 cpumask_var_t offline;
@@ -204,29 +207,6 @@ static ssize_t print_cpus_offline(struct sysdev_class *class, char *buf)
204} 207}
205static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL); 208static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
206 209
207static struct sysdev_class_attribute *cpu_state_attr[] = {
208 &attr_online_map,
209 &attr_possible_map,
210 &attr_present_map,
211 &attr_kernel_max,
212 &attr_offline,
213};
214
215static int cpu_states_init(void)
216{
217 int i;
218 int err = 0;
219
220 for (i = 0; i < ARRAY_SIZE(cpu_state_attr); i++) {
221 int ret;
222 ret = sysdev_class_create_file(&cpu_sysdev_class,
223 cpu_state_attr[i]);
224 if (!err)
225 err = ret;
226 }
227 return err;
228}
229
230/* 210/*
231 * register_cpu - Setup a sysfs device for a CPU. 211 * register_cpu - Setup a sysfs device for a CPU.
232 * @cpu - cpu->hotpluggable field set to 1 will generate a control file in 212 * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
@@ -272,9 +252,6 @@ int __init cpu_dev_init(void)
272 int err; 252 int err;
273 253
274 err = sysdev_class_register(&cpu_sysdev_class); 254 err = sysdev_class_register(&cpu_sysdev_class);
275 if (!err)
276 err = cpu_states_init();
277
278#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT) 255#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
279 if (!err) 256 if (!err)
280 err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class); 257 err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
@@ -282,3 +259,16 @@ int __init cpu_dev_init(void)
282 259
283 return err; 260 return err;
284} 261}
262
263static struct sysdev_class_attribute *cpu_sysdev_class_attrs[] = {
264#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
265 &attr_probe,
266 &attr_release,
267#endif
268 &cpu_attrs[0].attr,
269 &cpu_attrs[1].attr,
270 &cpu_attrs[2].attr,
271 &attr_kernel_max,
272 &attr_offline,
273 NULL
274};
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index ee95c76bfd3d..c89291f8a16b 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -85,7 +85,7 @@ static void driver_sysfs_remove(struct device *dev)
85 * for before calling this. (It is ok to call with no other effort 85 * for before calling this. (It is ok to call with no other effort
86 * from a driver's probe() method.) 86 * from a driver's probe() method.)
87 * 87 *
88 * This function must be called with @dev->sem held. 88 * This function must be called with the device lock held.
89 */ 89 */
90int device_bind_driver(struct device *dev) 90int device_bind_driver(struct device *dev)
91{ 91{
@@ -190,8 +190,8 @@ EXPORT_SYMBOL_GPL(wait_for_device_probe);
190 * This function returns -ENODEV if the device is not registered, 190 * This function returns -ENODEV if the device is not registered,
191 * 1 if the device is bound successfully and 0 otherwise. 191 * 1 if the device is bound successfully and 0 otherwise.
192 * 192 *
193 * This function must be called with @dev->sem held. When called for a 193 * This function must be called with @dev lock held. When called for a
194 * USB interface, @dev->parent->sem must be held as well. 194 * USB interface, @dev->parent lock must be held as well.
195 */ 195 */
196int driver_probe_device(struct device_driver *drv, struct device *dev) 196int driver_probe_device(struct device_driver *drv, struct device *dev)
197{ 197{
@@ -233,13 +233,13 @@ static int __device_attach(struct device_driver *drv, void *data)
233 * 0 if no matching driver was found; 233 * 0 if no matching driver was found;
234 * -ENODEV if the device is not registered. 234 * -ENODEV if the device is not registered.
235 * 235 *
236 * When called for a USB interface, @dev->parent->sem must be held. 236 * When called for a USB interface, @dev->parent lock must be held.
237 */ 237 */
238int device_attach(struct device *dev) 238int device_attach(struct device *dev)
239{ 239{
240 int ret = 0; 240 int ret = 0;
241 241
242 down(&dev->sem); 242 device_lock(dev);
243 if (dev->driver) { 243 if (dev->driver) {
244 ret = device_bind_driver(dev); 244 ret = device_bind_driver(dev);
245 if (ret == 0) 245 if (ret == 0)
@@ -253,7 +253,7 @@ int device_attach(struct device *dev)
253 ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach); 253 ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
254 pm_runtime_put_sync(dev); 254 pm_runtime_put_sync(dev);
255 } 255 }
256 up(&dev->sem); 256 device_unlock(dev);
257 return ret; 257 return ret;
258} 258}
259EXPORT_SYMBOL_GPL(device_attach); 259EXPORT_SYMBOL_GPL(device_attach);
@@ -276,13 +276,13 @@ static int __driver_attach(struct device *dev, void *data)
276 return 0; 276 return 0;
277 277
278 if (dev->parent) /* Needed for USB */ 278 if (dev->parent) /* Needed for USB */
279 down(&dev->parent->sem); 279 device_lock(dev->parent);
280 down(&dev->sem); 280 device_lock(dev);
281 if (!dev->driver) 281 if (!dev->driver)
282 driver_probe_device(drv, dev); 282 driver_probe_device(drv, dev);
283 up(&dev->sem); 283 device_unlock(dev);
284 if (dev->parent) 284 if (dev->parent)
285 up(&dev->parent->sem); 285 device_unlock(dev->parent);
286 286
287 return 0; 287 return 0;
288} 288}
@@ -303,8 +303,8 @@ int driver_attach(struct device_driver *drv)
303EXPORT_SYMBOL_GPL(driver_attach); 303EXPORT_SYMBOL_GPL(driver_attach);
304 304
305/* 305/*
306 * __device_release_driver() must be called with @dev->sem held. 306 * __device_release_driver() must be called with @dev lock held.
307 * When called for a USB interface, @dev->parent->sem must be held as well. 307 * When called for a USB interface, @dev->parent lock must be held as well.
308 */ 308 */
309static void __device_release_driver(struct device *dev) 309static void __device_release_driver(struct device *dev)
310{ 310{
@@ -343,7 +343,7 @@ static void __device_release_driver(struct device *dev)
343 * @dev: device. 343 * @dev: device.
344 * 344 *
345 * Manually detach device from driver. 345 * Manually detach device from driver.
346 * When called for a USB interface, @dev->parent->sem must be held. 346 * When called for a USB interface, @dev->parent lock must be held.
347 */ 347 */
348void device_release_driver(struct device *dev) 348void device_release_driver(struct device *dev)
349{ 349{
@@ -352,9 +352,9 @@ void device_release_driver(struct device *dev)
352 * within their ->remove callback for the same device, they 352 * within their ->remove callback for the same device, they
353 * will deadlock right here. 353 * will deadlock right here.
354 */ 354 */
355 down(&dev->sem); 355 device_lock(dev);
356 __device_release_driver(dev); 356 __device_release_driver(dev);
357 up(&dev->sem); 357 device_unlock(dev);
358} 358}
359EXPORT_SYMBOL_GPL(device_release_driver); 359EXPORT_SYMBOL_GPL(device_release_driver);
360 360
@@ -381,13 +381,13 @@ void driver_detach(struct device_driver *drv)
381 spin_unlock(&drv->p->klist_devices.k_lock); 381 spin_unlock(&drv->p->klist_devices.k_lock);
382 382
383 if (dev->parent) /* Needed for USB */ 383 if (dev->parent) /* Needed for USB */
384 down(&dev->parent->sem); 384 device_lock(dev->parent);
385 down(&dev->sem); 385 device_lock(dev);
386 if (dev->driver == drv) 386 if (dev->driver == drv)
387 __device_release_driver(dev); 387 __device_release_driver(dev);
388 up(&dev->sem); 388 device_unlock(dev);
389 if (dev->parent) 389 if (dev->parent)
390 up(&dev->parent->sem); 390 device_unlock(dev->parent);
391 put_device(dev); 391 put_device(dev);
392 } 392 }
393} 393}
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 05dd307e8f02..cf7a0c788052 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -9,6 +9,7 @@
9 9
10#include <linux/device.h> 10#include <linux/device.h>
11#include <linux/module.h> 11#include <linux/module.h>
12#include <linux/slab.h>
12 13
13#include "base.h" 14#include "base.h"
14 15
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 42ae452b36b0..057cf11326bf 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -23,6 +23,7 @@
23#include <linux/cred.h> 23#include <linux/cred.h>
24#include <linux/sched.h> 24#include <linux/sched.h>
25#include <linux/init_task.h> 25#include <linux/init_task.h>
26#include <linux/slab.h>
26 27
27static struct vfsmount *dev_mnt; 28static struct vfsmount *dev_mnt;
28 29
@@ -301,6 +302,19 @@ int devtmpfs_delete_node(struct device *dev)
301 if (dentry->d_inode) { 302 if (dentry->d_inode) {
302 err = vfs_getattr(nd.path.mnt, dentry, &stat); 303 err = vfs_getattr(nd.path.mnt, dentry, &stat);
303 if (!err && dev_mynode(dev, dentry->d_inode, &stat)) { 304 if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
305 struct iattr newattrs;
306 /*
307 * before unlinking this node, reset permissions
308 * of possible references like hardlinks
309 */
310 newattrs.ia_uid = 0;
311 newattrs.ia_gid = 0;
312 newattrs.ia_mode = stat.mode & ~0777;
313 newattrs.ia_valid =
314 ATTR_UID|ATTR_GID|ATTR_MODE;
315 mutex_lock(&dentry->d_inode->i_mutex);
316 notify_change(dentry, &newattrs);
317 mutex_unlock(&dentry->d_inode->i_mutex);
304 err = vfs_unlink(nd.path.dentry->d_inode, 318 err = vfs_unlink(nd.path.dentry->d_inode,
305 dentry); 319 dentry);
306 if (!err || err == -ENOENT) 320 if (!err || err == -ENOENT)
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index 962a3b574f21..d4d8ce53886a 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -2,6 +2,7 @@
2 * Coherent per-device memory handling. 2 * Coherent per-device memory handling.
3 * Borrowed from i386 3 * Borrowed from i386
4 */ 4 */
5#include <linux/slab.h>
5#include <linux/kernel.h> 6#include <linux/kernel.h>
6#include <linux/dma-mapping.h> 7#include <linux/dma-mapping.h>
7 8
diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index ca9186f70a69..763d59c1eb65 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -8,6 +8,7 @@
8 */ 8 */
9 9
10#include <linux/dma-mapping.h> 10#include <linux/dma-mapping.h>
11#include <linux/gfp.h>
11 12
12/* 13/*
13 * Managed DMA API 14 * Managed DMA API
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 90c9fff09ead..b631f7c59453 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -13,6 +13,7 @@
13#include <linux/device.h> 13#include <linux/device.h>
14#include <linux/module.h> 14#include <linux/module.h>
15#include <linux/errno.h> 15#include <linux/errno.h>
16#include <linux/slab.h>
16#include <linux/string.h> 17#include <linux/string.h>
17#include "base.h" 18#include "base.h"
18 19
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index a95024166b66..985da11174e7 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -19,7 +19,7 @@
19#include <linux/kthread.h> 19#include <linux/kthread.h>
20#include <linux/highmem.h> 20#include <linux/highmem.h>
21#include <linux/firmware.h> 21#include <linux/firmware.h>
22#include "base.h" 22#include <linux/slab.h>
23 23
24#define to_dev(obj) container_of(obj, struct device, kobj) 24#define to_dev(obj) container_of(obj, struct device, kobj)
25 25
@@ -69,7 +69,9 @@ fw_load_abort(struct firmware_priv *fw_priv)
69} 69}
70 70
71static ssize_t 71static ssize_t
72firmware_timeout_show(struct class *class, char *buf) 72firmware_timeout_show(struct class *class,
73 struct class_attribute *attr,
74 char *buf)
73{ 75{
74 return sprintf(buf, "%d\n", loading_timeout); 76 return sprintf(buf, "%d\n", loading_timeout);
75} 77}
@@ -77,6 +79,7 @@ firmware_timeout_show(struct class *class, char *buf)
77/** 79/**
78 * firmware_timeout_store - set number of seconds to wait for firmware 80 * firmware_timeout_store - set number of seconds to wait for firmware
79 * @class: device class pointer 81 * @class: device class pointer
82 * @attr: device attribute pointer
80 * @buf: buffer to scan for timeout value 83 * @buf: buffer to scan for timeout value
81 * @count: number of bytes in @buf 84 * @count: number of bytes in @buf
82 * 85 *
@@ -87,7 +90,9 @@ firmware_timeout_show(struct class *class, char *buf)
87 * Note: zero means 'wait forever'. 90 * Note: zero means 'wait forever'.
88 **/ 91 **/
89static ssize_t 92static ssize_t
90firmware_timeout_store(struct class *class, const char *buf, size_t count) 93firmware_timeout_store(struct class *class,
94 struct class_attribute *attr,
95 const char *buf, size_t count)
91{ 96{
92 loading_timeout = simple_strtol(buf, NULL, 10); 97 loading_timeout = simple_strtol(buf, NULL, 10);
93 if (loading_timeout < 0) 98 if (loading_timeout < 0)
@@ -439,6 +444,7 @@ static int fw_setup_device(struct firmware *fw, struct device **dev_p,
439 fw_priv = dev_get_drvdata(f_dev); 444 fw_priv = dev_get_drvdata(f_dev);
440 445
441 fw_priv->fw = fw; 446 fw_priv->fw = fw;
447 sysfs_bin_attr_init(&fw_priv->attr_data);
442 retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data); 448 retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
443 if (retval) { 449 if (retval) {
444 dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__); 450 dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
@@ -610,7 +616,7 @@ request_firmware_work_func(void *arg)
610} 616}
611 617
612/** 618/**
613 * request_firmware_nowait: asynchronous version of request_firmware 619 * request_firmware_nowait - asynchronous version of request_firmware
614 * @module: module requesting the firmware 620 * @module: module requesting the firmware
615 * @uevent: sends uevent to copy the firmware image if this flag 621 * @uevent: sends uevent to copy the firmware image if this flag
616 * is non-zero else the firmware copy must be done manually. 622 * is non-zero else the firmware copy must be done manually.
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index bd025059711f..933442f40321 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -22,6 +22,7 @@
22#include <linux/mm.h> 22#include <linux/mm.h>
23#include <linux/mutex.h> 23#include <linux/mutex.h>
24#include <linux/stat.h> 24#include <linux/stat.h>
25#include <linux/slab.h>
25 26
26#include <asm/atomic.h> 27#include <asm/atomic.h>
27#include <asm/uaccess.h> 28#include <asm/uaccess.h>
@@ -44,7 +45,7 @@ static int memory_uevent(struct kset *kset, struct kobject *obj, struct kobj_uev
44 return retval; 45 return retval;
45} 46}
46 47
47static struct kset_uevent_ops memory_uevent_ops = { 48static const struct kset_uevent_ops memory_uevent_ops = {
48 .name = memory_uevent_name, 49 .name = memory_uevent_name,
49 .uevent = memory_uevent, 50 .uevent = memory_uevent,
50}; 51};
@@ -309,17 +310,18 @@ static SYSDEV_ATTR(removable, 0444, show_mem_removable, NULL);
309 * Block size attribute stuff 310 * Block size attribute stuff
310 */ 311 */
311static ssize_t 312static ssize_t
312print_block_size(struct class *class, char *buf) 313print_block_size(struct sysdev_class *class, struct sysdev_class_attribute *attr,
314 char *buf)
313{ 315{
314 return sprintf(buf, "%#lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE); 316 return sprintf(buf, "%lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE);
315} 317}
316 318
317static CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL); 319static SYSDEV_CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL);
318 320
319static int block_size_init(void) 321static int block_size_init(void)
320{ 322{
321 return sysfs_create_file(&memory_sysdev_class.kset.kobj, 323 return sysfs_create_file(&memory_sysdev_class.kset.kobj,
322 &class_attr_block_size_bytes.attr); 324 &attr_block_size_bytes.attr);
323} 325}
324 326
325/* 327/*
@@ -330,7 +332,8 @@ static int block_size_init(void)
330 */ 332 */
331#ifdef CONFIG_ARCH_MEMORY_PROBE 333#ifdef CONFIG_ARCH_MEMORY_PROBE
332static ssize_t 334static ssize_t
333memory_probe_store(struct class *class, const char *buf, size_t count) 335memory_probe_store(struct class *class, struct class_attribute *attr,
336 const char *buf, size_t count)
334{ 337{
335 u64 phys_addr; 338 u64 phys_addr;
336 int nid; 339 int nid;
@@ -367,7 +370,9 @@ static inline int memory_probe_init(void)
367 370
368/* Soft offline a page */ 371/* Soft offline a page */
369static ssize_t 372static ssize_t
370store_soft_offline_page(struct class *class, const char *buf, size_t count) 373store_soft_offline_page(struct class *class,
374 struct class_attribute *attr,
375 const char *buf, size_t count)
371{ 376{
372 int ret; 377 int ret;
373 u64 pfn; 378 u64 pfn;
@@ -384,7 +389,9 @@ store_soft_offline_page(struct class *class, const char *buf, size_t count)
384 389
385/* Forcibly offline a page, including killing processes. */ 390/* Forcibly offline a page, including killing processes. */
386static ssize_t 391static ssize_t
387store_hard_offline_page(struct class *class, const char *buf, size_t count) 392store_hard_offline_page(struct class *class,
393 struct class_attribute *attr,
394 const char *buf, size_t count)
388{ 395{
389 int ret; 396 int ret;
390 u64 pfn; 397 u64 pfn;
@@ -423,12 +430,16 @@ static inline int memory_fail_init(void)
423 * differentiation between which *physical* devices each 430 * differentiation between which *physical* devices each
424 * section belongs to... 431 * section belongs to...
425 */ 432 */
433int __weak arch_get_memory_phys_device(unsigned long start_pfn)
434{
435 return 0;
436}
426 437
427static int add_memory_block(int nid, struct mem_section *section, 438static int add_memory_block(int nid, struct mem_section *section,
428 unsigned long state, int phys_device, 439 unsigned long state, enum mem_add_context context)
429 enum mem_add_context context)
430{ 440{
431 struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL); 441 struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL);
442 unsigned long start_pfn;
432 int ret = 0; 443 int ret = 0;
433 444
434 if (!mem) 445 if (!mem)
@@ -437,7 +448,8 @@ static int add_memory_block(int nid, struct mem_section *section,
437 mem->phys_index = __section_nr(section); 448 mem->phys_index = __section_nr(section);
438 mem->state = state; 449 mem->state = state;
439 mutex_init(&mem->state_mutex); 450 mutex_init(&mem->state_mutex);
440 mem->phys_device = phys_device; 451 start_pfn = section_nr_to_pfn(mem->phys_index);
452 mem->phys_device = arch_get_memory_phys_device(start_pfn);
441 453
442 ret = register_memory(mem, section); 454 ret = register_memory(mem, section);
443 if (!ret) 455 if (!ret)
@@ -509,7 +521,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
509 */ 521 */
510int register_new_memory(int nid, struct mem_section *section) 522int register_new_memory(int nid, struct mem_section *section)
511{ 523{
512 return add_memory_block(nid, section, MEM_OFFLINE, 0, HOTPLUG); 524 return add_memory_block(nid, section, MEM_OFFLINE, HOTPLUG);
513} 525}
514 526
515int unregister_memory_section(struct mem_section *section) 527int unregister_memory_section(struct mem_section *section)
@@ -542,7 +554,7 @@ int __init memory_dev_init(void)
542 if (!present_section_nr(i)) 554 if (!present_section_nr(i))
543 continue; 555 continue;
544 err = add_memory_block(0, __nr_to_section(i), MEM_ONLINE, 556 err = add_memory_block(0, __nr_to_section(i), MEM_ONLINE,
545 0, BOOT); 557 BOOT);
546 if (!ret) 558 if (!ret)
547 ret = err; 559 ret = err;
548 } 560 }
diff --git a/drivers/base/module.c b/drivers/base/module.c
index 103be9cacb05..f32f2f9b7be5 100644
--- a/drivers/base/module.c
+++ b/drivers/base/module.c
@@ -7,6 +7,7 @@
7#include <linux/device.h> 7#include <linux/device.h>
8#include <linux/module.h> 8#include <linux/module.h>
9#include <linux/errno.h> 9#include <linux/errno.h>
10#include <linux/slab.h>
10#include <linux/string.h> 11#include <linux/string.h>
11#include "base.h" 12#include "base.h"
12 13
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 70122791683d..057979a19eea 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -15,9 +15,13 @@
15#include <linux/cpu.h> 15#include <linux/cpu.h>
16#include <linux/device.h> 16#include <linux/device.h>
17#include <linux/swap.h> 17#include <linux/swap.h>
18#include <linux/slab.h>
19
20static struct sysdev_class_attribute *node_state_attrs[];
18 21
19static struct sysdev_class node_class = { 22static struct sysdev_class node_class = {
20 .name = "node", 23 .name = "node",
24 .attrs = node_state_attrs,
21}; 25};
22 26
23 27
@@ -162,8 +166,11 @@ static ssize_t node_read_distance(struct sys_device * dev,
162 int len = 0; 166 int len = 0;
163 int i; 167 int i;
164 168
165 /* buf currently PAGE_SIZE, need ~4 chars per node */ 169 /*
166 BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); 170 * buf is currently PAGE_SIZE in length and each node needs 4 chars
171 * at the most (distance + space or newline).
172 */
173 BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE);
167 174
168 for_each_online_node(i) 175 for_each_online_node(i)
169 len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); 176 len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
@@ -544,76 +551,52 @@ static ssize_t print_nodes_state(enum node_states state, char *buf)
544 return n; 551 return n;
545} 552}
546 553
547static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) 554struct node_attr {
548{ 555 struct sysdev_class_attribute attr;
549 return print_nodes_state(N_POSSIBLE, buf); 556 enum node_states state;
550} 557};
551
552static ssize_t print_nodes_online(struct sysdev_class *class, char *buf)
553{
554 return print_nodes_state(N_ONLINE, buf);
555}
556
557static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
558 char *buf)
559{
560 return print_nodes_state(N_NORMAL_MEMORY, buf);
561}
562 558
563static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) 559static ssize_t show_node_state(struct sysdev_class *class,
560 struct sysdev_class_attribute *attr, char *buf)
564{ 561{
565 return print_nodes_state(N_CPU, buf); 562 struct node_attr *na = container_of(attr, struct node_attr, attr);
563 return print_nodes_state(na->state, buf);
566} 564}
567 565
568static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); 566#define _NODE_ATTR(name, state) \
569static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); 567 { _SYSDEV_CLASS_ATTR(name, 0444, show_node_state, NULL), state }
570static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
571 NULL);
572static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);
573 568
569static struct node_attr node_state_attr[] = {
570 _NODE_ATTR(possible, N_POSSIBLE),
571 _NODE_ATTR(online, N_ONLINE),
572 _NODE_ATTR(has_normal_memory, N_NORMAL_MEMORY),
573 _NODE_ATTR(has_cpu, N_CPU),
574#ifdef CONFIG_HIGHMEM 574#ifdef CONFIG_HIGHMEM
575static ssize_t print_nodes_has_high_memory(struct sysdev_class *class, 575 _NODE_ATTR(has_high_memory, N_HIGH_MEMORY),
576 char *buf)
577{
578 return print_nodes_state(N_HIGH_MEMORY, buf);
579}
580
581static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
582 NULL);
583#endif 576#endif
577};
584 578
585struct sysdev_class_attribute *node_state_attr[] = { 579static struct sysdev_class_attribute *node_state_attrs[] = {
586 &attr_possible, 580 &node_state_attr[0].attr,
587 &attr_online, 581 &node_state_attr[1].attr,
588 &attr_has_normal_memory, 582 &node_state_attr[2].attr,
583 &node_state_attr[3].attr,
589#ifdef CONFIG_HIGHMEM 584#ifdef CONFIG_HIGHMEM
590 &attr_has_high_memory, 585 &node_state_attr[4].attr,
591#endif 586#endif
592 &attr_has_cpu, 587 NULL
593}; 588};
594 589
595static int node_states_init(void)
596{
597 int i;
598 int err = 0;
599
600 for (i = 0; i < NR_NODE_STATES; i++) {
601 int ret;
602 ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
603 if (!err)
604 err = ret;
605 }
606 return err;
607}
608
609#define NODE_CALLBACK_PRI 2 /* lower than SLAB */ 590#define NODE_CALLBACK_PRI 2 /* lower than SLAB */
610static int __init register_node_type(void) 591static int __init register_node_type(void)
611{ 592{
612 int ret; 593 int ret;
613 594
595 BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES);
596 BUILD_BUG_ON(ARRAY_SIZE(node_state_attrs)-1 != NR_NODE_STATES);
597
614 ret = sysdev_class_register(&node_class); 598 ret = sysdev_class_register(&node_class);
615 if (!ret) { 599 if (!ret) {
616 ret = node_states_init();
617 hotplug_memory_notifier(node_memory_callback, 600 hotplug_memory_notifier(node_memory_callback,
618 NODE_CALLBACK_PRI); 601 NODE_CALLBACK_PRI);
619 } 602 }
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 58efaf2f1259..4b4b565c835f 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -128,7 +128,7 @@ struct platform_object {
128}; 128};
129 129
130/** 130/**
131 * platform_device_put 131 * platform_device_put - destroy a platform device
132 * @pdev: platform device to free 132 * @pdev: platform device to free
133 * 133 *
134 * Free all memory associated with a platform device. This function must 134 * Free all memory associated with a platform device. This function must
@@ -152,7 +152,7 @@ static void platform_device_release(struct device *dev)
152} 152}
153 153
154/** 154/**
155 * platform_device_alloc 155 * platform_device_alloc - create a platform device
156 * @name: base name of the device we're adding 156 * @name: base name of the device we're adding
157 * @id: instance id 157 * @id: instance id
158 * 158 *
@@ -177,7 +177,7 @@ struct platform_device *platform_device_alloc(const char *name, int id)
177EXPORT_SYMBOL_GPL(platform_device_alloc); 177EXPORT_SYMBOL_GPL(platform_device_alloc);
178 178
179/** 179/**
180 * platform_device_add_resources 180 * platform_device_add_resources - add resources to a platform device
181 * @pdev: platform device allocated by platform_device_alloc to add resources to 181 * @pdev: platform device allocated by platform_device_alloc to add resources to
182 * @res: set of resources that needs to be allocated for the device 182 * @res: set of resources that needs to be allocated for the device
183 * @num: number of resources 183 * @num: number of resources
@@ -202,7 +202,7 @@ int platform_device_add_resources(struct platform_device *pdev,
202EXPORT_SYMBOL_GPL(platform_device_add_resources); 202EXPORT_SYMBOL_GPL(platform_device_add_resources);
203 203
204/** 204/**
205 * platform_device_add_data 205 * platform_device_add_data - add platform-specific data to a platform device
206 * @pdev: platform device allocated by platform_device_alloc to add resources to 206 * @pdev: platform device allocated by platform_device_alloc to add resources to
207 * @data: platform specific data for this platform device 207 * @data: platform specific data for this platform device
208 * @size: size of platform specific data 208 * @size: size of platform specific data
@@ -344,7 +344,7 @@ void platform_device_unregister(struct platform_device *pdev)
344EXPORT_SYMBOL_GPL(platform_device_unregister); 344EXPORT_SYMBOL_GPL(platform_device_unregister);
345 345
346/** 346/**
347 * platform_device_register_simple 347 * platform_device_register_simple - add a platform-level device and its resources
348 * @name: base name of the device we're adding 348 * @name: base name of the device we're adding
349 * @id: instance id 349 * @id: instance id
350 * @res: set of resources that needs to be allocated for the device 350 * @res: set of resources that needs to be allocated for the device
@@ -362,6 +362,8 @@ EXPORT_SYMBOL_GPL(platform_device_unregister);
362 * enumeration tasks, they don't fully conform to the Linux driver model. 362 * enumeration tasks, they don't fully conform to the Linux driver model.
363 * In particular, when such drivers are built as modules, they can't be 363 * In particular, when such drivers are built as modules, they can't be
364 * "hotplugged". 364 * "hotplugged".
365 *
366 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
365 */ 367 */
366struct platform_device *platform_device_register_simple(const char *name, 368struct platform_device *platform_device_register_simple(const char *name,
367 int id, 369 int id,
@@ -396,7 +398,7 @@ error:
396EXPORT_SYMBOL_GPL(platform_device_register_simple); 398EXPORT_SYMBOL_GPL(platform_device_register_simple);
397 399
398/** 400/**
399 * platform_device_register_data 401 * platform_device_register_data - add a platform-level device with platform-specific data
400 * @parent: parent device for the device we're adding 402 * @parent: parent device for the device we're adding
401 * @name: base name of the device we're adding 403 * @name: base name of the device we're adding
402 * @id: instance id 404 * @id: instance id
@@ -408,6 +410,8 @@ EXPORT_SYMBOL_GPL(platform_device_register_simple);
408 * allocated for the device allows drivers using such devices to be 410 * allocated for the device allows drivers using such devices to be
409 * unloaded without waiting for the last reference to the device to be 411 * unloaded without waiting for the last reference to the device to be
410 * dropped. 412 * dropped.
413 *
414 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
411 */ 415 */
412struct platform_device *platform_device_register_data( 416struct platform_device *platform_device_register_data(
413 struct device *parent, 417 struct device *parent,
@@ -473,7 +477,7 @@ static void platform_drv_shutdown(struct device *_dev)
473} 477}
474 478
475/** 479/**
476 * platform_driver_register 480 * platform_driver_register - register a driver for platform-level devices
477 * @drv: platform driver structure 481 * @drv: platform driver structure
478 */ 482 */
479int platform_driver_register(struct platform_driver *drv) 483int platform_driver_register(struct platform_driver *drv)
@@ -491,7 +495,7 @@ int platform_driver_register(struct platform_driver *drv)
491EXPORT_SYMBOL_GPL(platform_driver_register); 495EXPORT_SYMBOL_GPL(platform_driver_register);
492 496
493/** 497/**
494 * platform_driver_unregister 498 * platform_driver_unregister - unregister a driver for platform-level devices
495 * @drv: platform driver structure 499 * @drv: platform driver structure
496 */ 500 */
497void platform_driver_unregister(struct platform_driver *drv) 501void platform_driver_unregister(struct platform_driver *drv)
@@ -548,6 +552,66 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
548} 552}
549EXPORT_SYMBOL_GPL(platform_driver_probe); 553EXPORT_SYMBOL_GPL(platform_driver_probe);
550 554
555/**
556 * platform_create_bundle - register driver and create corresponding device
557 * @driver: platform driver structure
558 * @probe: the driver probe routine, probably from an __init section
559 * @res: set of resources that needs to be allocated for the device
560 * @n_res: number of resources
561 * @data: platform specific data for this platform device
562 * @size: size of platform specific data
563 *
564 * Use this in legacy-style modules that probe hardware directly and
565 * register a single platform device and corresponding platform driver.
566 *
567 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
568 */
569struct platform_device * __init_or_module platform_create_bundle(
570 struct platform_driver *driver,
571 int (*probe)(struct platform_device *),
572 struct resource *res, unsigned int n_res,
573 const void *data, size_t size)
574{
575 struct platform_device *pdev;
576 int error;
577
578 pdev = platform_device_alloc(driver->driver.name, -1);
579 if (!pdev) {
580 error = -ENOMEM;
581 goto err_out;
582 }
583
584 if (res) {
585 error = platform_device_add_resources(pdev, res, n_res);
586 if (error)
587 goto err_pdev_put;
588 }
589
590 if (data) {
591 error = platform_device_add_data(pdev, data, size);
592 if (error)
593 goto err_pdev_put;
594 }
595
596 error = platform_device_add(pdev);
597 if (error)
598 goto err_pdev_put;
599
600 error = platform_driver_probe(driver, probe);
601 if (error)
602 goto err_pdev_del;
603
604 return pdev;
605
606err_pdev_del:
607 platform_device_del(pdev);
608err_pdev_put:
609 platform_device_put(pdev);
610err_out:
611 return ERR_PTR(error);
612}
613EXPORT_SYMBOL_GPL(platform_create_bundle);
614
551/* modalias support enables more hands-off userspace setup: 615/* modalias support enables more hands-off userspace setup:
552 * (a) environment variable lets new-style hotplug events work once system is 616 * (a) environment variable lets new-style hotplug events work once system is
553 * fully running: "modprobe $MODALIAS" 617 * fully running: "modprobe $MODALIAS"
@@ -578,7 +642,7 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
578} 642}
579 643
580static const struct platform_device_id *platform_match_id( 644static const struct platform_device_id *platform_match_id(
581 struct platform_device_id *id, 645 const struct platform_device_id *id,
582 struct platform_device *pdev) 646 struct platform_device *pdev)
583{ 647{
584 while (id->name[0]) { 648 while (id->name[0]) {
@@ -994,9 +1058,11 @@ static __initdata LIST_HEAD(early_platform_driver_list);
994static __initdata LIST_HEAD(early_platform_device_list); 1058static __initdata LIST_HEAD(early_platform_device_list);
995 1059
996/** 1060/**
997 * early_platform_driver_register 1061 * early_platform_driver_register - register early platform driver
998 * @epdrv: early_platform driver structure 1062 * @epdrv: early_platform driver structure
999 * @buf: string passed from early_param() 1063 * @buf: string passed from early_param()
1064 *
1065 * Helper function for early_platform_init() / early_platform_init_buffer()
1000 */ 1066 */
1001int __init early_platform_driver_register(struct early_platform_driver *epdrv, 1067int __init early_platform_driver_register(struct early_platform_driver *epdrv,
1002 char *buf) 1068 char *buf)
@@ -1048,9 +1114,12 @@ int __init early_platform_driver_register(struct early_platform_driver *epdrv,
1048} 1114}
1049 1115
1050/** 1116/**
1051 * early_platform_add_devices - add a numbers of early platform devices 1117 * early_platform_add_devices - adds a number of early platform devices
1052 * @devs: array of early platform devices to add 1118 * @devs: array of early platform devices to add
1053 * @num: number of early platform devices in array 1119 * @num: number of early platform devices in array
1120 *
1121 * Used by early architecture code to register early platform devices and
1122 * their platform data.
1054 */ 1123 */
1055void __init early_platform_add_devices(struct platform_device **devs, int num) 1124void __init early_platform_add_devices(struct platform_device **devs, int num)
1056{ 1125{
@@ -1070,8 +1139,12 @@ void __init early_platform_add_devices(struct platform_device **devs, int num)
1070} 1139}
1071 1140
1072/** 1141/**
1073 * early_platform_driver_register_all 1142 * early_platform_driver_register_all - register early platform drivers
1074 * @class_str: string to identify early platform driver class 1143 * @class_str: string to identify early platform driver class
1144 *
1145 * Used by architecture code to register all early platform drivers
1146 * for a certain class. If omitted then only early platform drivers
1147 * with matching kernel command line class parameters will be registered.
1075 */ 1148 */
1076void __init early_platform_driver_register_all(char *class_str) 1149void __init early_platform_driver_register_all(char *class_str)
1077{ 1150{
@@ -1093,7 +1166,7 @@ void __init early_platform_driver_register_all(char *class_str)
1093} 1166}
1094 1167
1095/** 1168/**
1096 * early_platform_match 1169 * early_platform_match - find early platform device matching driver
1097 * @epdrv: early platform driver structure 1170 * @epdrv: early platform driver structure
1098 * @id: id to match against 1171 * @id: id to match against
1099 */ 1172 */
@@ -1111,7 +1184,7 @@ early_platform_match(struct early_platform_driver *epdrv, int id)
1111} 1184}
1112 1185
1113/** 1186/**
1114 * early_platform_left 1187 * early_platform_left - check if early platform driver has matching devices
1115 * @epdrv: early platform driver structure 1188 * @epdrv: early platform driver structure
1116 * @id: return true if id or above exists 1189 * @id: return true if id or above exists
1117 */ 1190 */
@@ -1129,7 +1202,7 @@ static __init int early_platform_left(struct early_platform_driver *epdrv,
1129} 1202}
1130 1203
1131/** 1204/**
1132 * early_platform_driver_probe_id 1205 * early_platform_driver_probe_id - probe drivers matching class_str and id
1133 * @class_str: string to identify early platform driver class 1206 * @class_str: string to identify early platform driver class
1134 * @id: id to match against 1207 * @id: id to match against
1135 * @nr_probe: number of platform devices to successfully probe before exiting 1208 * @nr_probe: number of platform devices to successfully probe before exiting
@@ -1199,10 +1272,14 @@ static int __init early_platform_driver_probe_id(char *class_str,
1199} 1272}
1200 1273
1201/** 1274/**
1202 * early_platform_driver_probe 1275 * early_platform_driver_probe - probe a class of registered drivers
1203 * @class_str: string to identify early platform driver class 1276 * @class_str: string to identify early platform driver class
1204 * @nr_probe: number of platform devices to successfully probe before exiting 1277 * @nr_probe: number of platform devices to successfully probe before exiting
1205 * @user_only: only probe user specified early platform devices 1278 * @user_only: only probe user specified early platform devices
1279 *
1280 * Used by architecture code to probe registered early platform drivers
1281 * within a certain class. For probe to happen a registered early platform
1282 * device matching a registered early platform driver is needed.
1206 */ 1283 */
1207int __init early_platform_driver_probe(char *class_str, 1284int __init early_platform_driver_probe(char *class_str,
1208 int nr_probe, 1285 int nr_probe,
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index 3ce3519e8f30..89de75325cea 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -1,6 +1,7 @@
1obj-$(CONFIG_PM) += sysfs.o 1obj-$(CONFIG_PM) += sysfs.o
2obj-$(CONFIG_PM_SLEEP) += main.o 2obj-$(CONFIG_PM_SLEEP) += main.o
3obj-$(CONFIG_PM_RUNTIME) += runtime.o 3obj-$(CONFIG_PM_RUNTIME) += runtime.o
4obj-$(CONFIG_PM_OPS) += generic_ops.o
4obj-$(CONFIG_PM_TRACE_RTC) += trace.o 5obj-$(CONFIG_PM_TRACE_RTC) += trace.o
5 6
6ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG 7ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
new file mode 100644
index 000000000000..4b29d4981253
--- /dev/null
+++ b/drivers/base/power/generic_ops.c
@@ -0,0 +1,233 @@
1/*
2 * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
3 *
4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
5 *
6 * This file is released under the GPLv2.
7 */
8
9#include <linux/pm.h>
10#include <linux/pm_runtime.h>
11
12#ifdef CONFIG_PM_RUNTIME
13/**
14 * pm_generic_runtime_idle - Generic runtime idle callback for subsystems.
15 * @dev: Device to handle.
16 *
17 * If PM operations are defined for the @dev's driver and they include
18 * ->runtime_idle(), execute it and return its error code, if nonzero.
19 * Otherwise, execute pm_runtime_suspend() for the device and return 0.
20 */
21int pm_generic_runtime_idle(struct device *dev)
22{
23 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
24
25 if (pm && pm->runtime_idle) {
26 int ret = pm->runtime_idle(dev);
27 if (ret)
28 return ret;
29 }
30
31 pm_runtime_suspend(dev);
32 return 0;
33}
34EXPORT_SYMBOL_GPL(pm_generic_runtime_idle);
35
36/**
37 * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
38 * @dev: Device to suspend.
39 *
40 * If PM operations are defined for the @dev's driver and they include
41 * ->runtime_suspend(), execute it and return its error code. Otherwise,
42 * return -EINVAL.
43 */
44int pm_generic_runtime_suspend(struct device *dev)
45{
46 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
47 int ret;
48
49 ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : -EINVAL;
50
51 return ret;
52}
53EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
54
55/**
56 * pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
57 * @dev: Device to resume.
58 *
59 * If PM operations are defined for the @dev's driver and they include
60 * ->runtime_resume(), execute it and return its error code. Otherwise,
61 * return -EINVAL.
62 */
63int pm_generic_runtime_resume(struct device *dev)
64{
65 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
66 int ret;
67
68 ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : -EINVAL;
69
70 return ret;
71}
72EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
73#endif /* CONFIG_PM_RUNTIME */
74
75#ifdef CONFIG_PM_SLEEP
76/**
77 * __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback.
78 * @dev: Device to handle.
79 * @event: PM transition of the system under way.
80 *
81 * If the device has not been suspended at run time, execute the
82 * suspend/freeze/poweroff/thaw callback provided by its driver, if defined, and
83 * return its error code. Otherwise, return zero.
84 */
85static int __pm_generic_call(struct device *dev, int event)
86{
87 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
88 int (*callback)(struct device *);
89
90 if (!pm || pm_runtime_suspended(dev))
91 return 0;
92
93 switch (event) {
94 case PM_EVENT_SUSPEND:
95 callback = pm->suspend;
96 break;
97 case PM_EVENT_FREEZE:
98 callback = pm->freeze;
99 break;
100 case PM_EVENT_HIBERNATE:
101 callback = pm->poweroff;
102 break;
103 case PM_EVENT_THAW:
104 callback = pm->thaw;
105 break;
106 default:
107 callback = NULL;
108 break;
109 }
110
111 return callback ? callback(dev) : 0;
112}
113
114/**
115 * pm_generic_suspend - Generic suspend callback for subsystems.
116 * @dev: Device to suspend.
117 */
118int pm_generic_suspend(struct device *dev)
119{
120 return __pm_generic_call(dev, PM_EVENT_SUSPEND);
121}
122EXPORT_SYMBOL_GPL(pm_generic_suspend);
123
124/**
125 * pm_generic_freeze - Generic freeze callback for subsystems.
126 * @dev: Device to freeze.
127 */
128int pm_generic_freeze(struct device *dev)
129{
130 return __pm_generic_call(dev, PM_EVENT_FREEZE);
131}
132EXPORT_SYMBOL_GPL(pm_generic_freeze);
133
134/**
135 * pm_generic_poweroff - Generic poweroff callback for subsystems.
136 * @dev: Device to handle.
137 */
138int pm_generic_poweroff(struct device *dev)
139{
140 return __pm_generic_call(dev, PM_EVENT_HIBERNATE);
141}
142EXPORT_SYMBOL_GPL(pm_generic_poweroff);
143
144/**
145 * pm_generic_thaw - Generic thaw callback for subsystems.
146 * @dev: Device to thaw.
147 */
148int pm_generic_thaw(struct device *dev)
149{
150 return __pm_generic_call(dev, PM_EVENT_THAW);
151}
152EXPORT_SYMBOL_GPL(pm_generic_thaw);
153
154/**
155 * __pm_generic_resume - Generic resume/restore callback for subsystems.
156 * @dev: Device to handle.
157 * @event: PM transition of the system under way.
158 *
159 * Execute the resume/resotre callback provided by the @dev's driver, if
160 * defined. If it returns 0, change the device's runtime PM status to 'active'.
161 * Return the callback's error code.
162 */
163static int __pm_generic_resume(struct device *dev, int event)
164{
165 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
166 int (*callback)(struct device *);
167 int ret;
168
169 if (!pm)
170 return 0;
171
172 switch (event) {
173 case PM_EVENT_RESUME:
174 callback = pm->resume;
175 break;
176 case PM_EVENT_RESTORE:
177 callback = pm->restore;
178 break;
179 default:
180 callback = NULL;
181 break;
182 }
183
184 if (!callback)
185 return 0;
186
187 ret = callback(dev);
188 if (!ret) {
189 pm_runtime_disable(dev);
190 pm_runtime_set_active(dev);
191 pm_runtime_enable(dev);
192 }
193
194 return ret;
195}
196
197/**
198 * pm_generic_resume - Generic resume callback for subsystems.
199 * @dev: Device to resume.
200 */
201int pm_generic_resume(struct device *dev)
202{
203 return __pm_generic_resume(dev, PM_EVENT_RESUME);
204}
205EXPORT_SYMBOL_GPL(pm_generic_resume);
206
207/**
208 * pm_generic_restore - Generic restore callback for subsystems.
209 * @dev: Device to restore.
210 */
211int pm_generic_restore(struct device *dev)
212{
213 return __pm_generic_resume(dev, PM_EVENT_RESTORE);
214}
215EXPORT_SYMBOL_GPL(pm_generic_restore);
216#endif /* CONFIG_PM_SLEEP */
217
218struct dev_pm_ops generic_subsys_pm_ops = {
219#ifdef CONFIG_PM_SLEEP
220 .suspend = pm_generic_suspend,
221 .resume = pm_generic_resume,
222 .freeze = pm_generic_freeze,
223 .thaw = pm_generic_thaw,
224 .poweroff = pm_generic_poweroff,
225 .restore = pm_generic_restore,
226#endif
227#ifdef CONFIG_PM_RUNTIME
228 .runtime_suspend = pm_generic_runtime_suspend,
229 .runtime_resume = pm_generic_runtime_resume,
230 .runtime_idle = pm_generic_runtime_idle,
231#endif
232};
233EXPORT_SYMBOL_GPL(generic_subsys_pm_ops);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 0e26a6f6fd48..941fcb87e52a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -35,8 +35,8 @@
35 * because children are guaranteed to be discovered after parents, and 35 * because children are guaranteed to be discovered after parents, and
36 * are inserted at the back of the list on discovery. 36 * are inserted at the back of the list on discovery.
37 * 37 *
38 * Since device_pm_add() may be called with a device semaphore held, 38 * Since device_pm_add() may be called with a device lock held,
39 * we must never try to acquire a device semaphore while holding 39 * we must never try to acquire a device lock while holding
40 * dpm_list_mutex. 40 * dpm_list_mutex.
41 */ 41 */
42 42
@@ -439,8 +439,23 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
439 if (dev->bus && dev->bus->pm) { 439 if (dev->bus && dev->bus->pm) {
440 pm_dev_dbg(dev, state, "EARLY "); 440 pm_dev_dbg(dev, state, "EARLY ");
441 error = pm_noirq_op(dev, dev->bus->pm, state); 441 error = pm_noirq_op(dev, dev->bus->pm, state);
442 if (error)
443 goto End;
442 } 444 }
443 445
446 if (dev->type && dev->type->pm) {
447 pm_dev_dbg(dev, state, "EARLY type ");
448 error = pm_noirq_op(dev, dev->type->pm, state);
449 if (error)
450 goto End;
451 }
452
453 if (dev->class && dev->class->pm) {
454 pm_dev_dbg(dev, state, "EARLY class ");
455 error = pm_noirq_op(dev, dev->class->pm, state);
456 }
457
458End:
444 TRACE_RESUME(error); 459 TRACE_RESUME(error);
445 return error; 460 return error;
446} 461}
@@ -508,7 +523,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
508 TRACE_RESUME(0); 523 TRACE_RESUME(0);
509 524
510 dpm_wait(dev->parent, async); 525 dpm_wait(dev->parent, async);
511 down(&dev->sem); 526 device_lock(dev);
512 527
513 dev->power.status = DPM_RESUMING; 528 dev->power.status = DPM_RESUMING;
514 529
@@ -543,7 +558,7 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
543 } 558 }
544 } 559 }
545 End: 560 End:
546 up(&dev->sem); 561 device_unlock(dev);
547 complete_all(&dev->power.completion); 562 complete_all(&dev->power.completion);
548 563
549 TRACE_RESUME(error); 564 TRACE_RESUME(error);
@@ -629,7 +644,7 @@ static void dpm_resume(pm_message_t state)
629 */ 644 */
630static void device_complete(struct device *dev, pm_message_t state) 645static void device_complete(struct device *dev, pm_message_t state)
631{ 646{
632 down(&dev->sem); 647 device_lock(dev);
633 648
634 if (dev->class && dev->class->pm && dev->class->pm->complete) { 649 if (dev->class && dev->class->pm && dev->class->pm->complete) {
635 pm_dev_dbg(dev, state, "completing class "); 650 pm_dev_dbg(dev, state, "completing class ");
@@ -646,7 +661,7 @@ static void device_complete(struct device *dev, pm_message_t state)
646 dev->bus->pm->complete(dev); 661 dev->bus->pm->complete(dev);
647 } 662 }
648 663
649 up(&dev->sem); 664 device_unlock(dev);
650} 665}
651 666
652/** 667/**
@@ -735,10 +750,26 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
735{ 750{
736 int error = 0; 751 int error = 0;
737 752
753 if (dev->class && dev->class->pm) {
754 pm_dev_dbg(dev, state, "LATE class ");
755 error = pm_noirq_op(dev, dev->class->pm, state);
756 if (error)
757 goto End;
758 }
759
760 if (dev->type && dev->type->pm) {
761 pm_dev_dbg(dev, state, "LATE type ");
762 error = pm_noirq_op(dev, dev->type->pm, state);
763 if (error)
764 goto End;
765 }
766
738 if (dev->bus && dev->bus->pm) { 767 if (dev->bus && dev->bus->pm) {
739 pm_dev_dbg(dev, state, "LATE "); 768 pm_dev_dbg(dev, state, "LATE ");
740 error = pm_noirq_op(dev, dev->bus->pm, state); 769 error = pm_noirq_op(dev, dev->bus->pm, state);
741 } 770 }
771
772End:
742 return error; 773 return error;
743} 774}
744 775
@@ -809,7 +840,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
809 int error = 0; 840 int error = 0;
810 841
811 dpm_wait_for_children(dev, async); 842 dpm_wait_for_children(dev, async);
812 down(&dev->sem); 843 device_lock(dev);
813 844
814 if (async_error) 845 if (async_error)
815 goto End; 846 goto End;
@@ -849,7 +880,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
849 dev->power.status = DPM_OFF; 880 dev->power.status = DPM_OFF;
850 881
851 End: 882 End:
852 up(&dev->sem); 883 device_unlock(dev);
853 complete_all(&dev->power.completion); 884 complete_all(&dev->power.completion);
854 885
855 return error; 886 return error;
@@ -938,7 +969,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
938{ 969{
939 int error = 0; 970 int error = 0;
940 971
941 down(&dev->sem); 972 device_lock(dev);
942 973
943 if (dev->bus && dev->bus->pm && dev->bus->pm->prepare) { 974 if (dev->bus && dev->bus->pm && dev->bus->pm->prepare) {
944 pm_dev_dbg(dev, state, "preparing "); 975 pm_dev_dbg(dev, state, "preparing ");
@@ -962,7 +993,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
962 suspend_report_result(dev->class->pm->prepare, error); 993 suspend_report_result(dev->class->pm->prepare, error);
963 } 994 }
964 End: 995 End:
965 up(&dev->sem); 996 device_unlock(dev);
966 997
967 return error; 998 return error;
968} 999}
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 0d903909af7e..9354dc10a363 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -17,7 +17,6 @@
17#include <linux/module.h> 17#include <linux/module.h>
18#include <linux/kernel.h> 18#include <linux/kernel.h>
19#include <linux/init.h> 19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/string.h> 20#include <linux/string.h>
22#include <linux/pm.h> 21#include <linux/pm.h>
23#include <linux/device.h> 22#include <linux/device.h>
@@ -54,7 +53,7 @@ sysdev_store(struct kobject *kobj, struct attribute *attr,
54 return -EIO; 53 return -EIO;
55} 54}
56 55
57static struct sysfs_ops sysfs_ops = { 56static const struct sysfs_ops sysfs_ops = {
58 .show = sysdev_show, 57 .show = sysdev_show,
59 .store = sysdev_store, 58 .store = sysdev_store,
60}; 59};
@@ -89,7 +88,7 @@ static ssize_t sysdev_class_show(struct kobject *kobj, struct attribute *attr,
89 struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr); 88 struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr);
90 89
91 if (class_attr->show) 90 if (class_attr->show)
92 return class_attr->show(class, buffer); 91 return class_attr->show(class, class_attr, buffer);
93 return -EIO; 92 return -EIO;
94} 93}
95 94
@@ -100,11 +99,11 @@ static ssize_t sysdev_class_store(struct kobject *kobj, struct attribute *attr,
100 struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr); 99 struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr);
101 100
102 if (class_attr->store) 101 if (class_attr->store)
103 return class_attr->store(class, buffer, count); 102 return class_attr->store(class, class_attr, buffer, count);
104 return -EIO; 103 return -EIO;
105} 104}
106 105
107static struct sysfs_ops sysfs_class_ops = { 106static const struct sysfs_ops sysfs_class_ops = {
108 .show = sysdev_class_show, 107 .show = sysdev_class_show,
109 .store = sysdev_class_store, 108 .store = sysdev_class_store,
110}; 109};
@@ -145,13 +144,20 @@ int sysdev_class_register(struct sysdev_class *cls)
145 if (retval) 144 if (retval)
146 return retval; 145 return retval;
147 146
148 return kset_register(&cls->kset); 147 retval = kset_register(&cls->kset);
148 if (!retval && cls->attrs)
149 retval = sysfs_create_files(&cls->kset.kobj,
150 (const struct attribute **)cls->attrs);
151 return retval;
149} 152}
150 153
151void sysdev_class_unregister(struct sysdev_class *cls) 154void sysdev_class_unregister(struct sysdev_class *cls)
152{ 155{
153 pr_debug("Unregistering sysdev class '%s'\n", 156 pr_debug("Unregistering sysdev class '%s'\n",
154 kobject_name(&cls->kset.kobj)); 157 kobject_name(&cls->kset.kobj));
158 if (cls->attrs)
159 sysfs_remove_files(&cls->kset.kobj,
160 (const struct attribute **)cls->attrs);
155 kset_unregister(&cls->kset); 161 kset_unregister(&cls->kset);
156} 162}
157 163
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-01 14:50:29 -0500