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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 23:15:35 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 23:15:35 -0500 |
| commit | 52cfd503ad7176d23a5dd7af3981744feb60622f (patch) | |
| tree | 0a8aeaaf4acbc86ac682f18632b8070c1c6b7ba1 /kernel | |
| parent | dc8e7e3ec60bd5ef7868aa88755e9d4c948dc5cc (diff) | |
| parent | 4263d9a3ae4d15785897d0543bb59316c84ee605 (diff) | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (59 commits)
ACPI / PM: Fix build problems for !CONFIG_ACPI related to NVS rework
ACPI: fix resource check message
ACPI / Battery: Update information on info notification and resume
ACPI: Drop device flag wake_capable
ACPI: Always check if _PRW is present before trying to evaluate it
ACPI / PM: Check status of power resources under mutexes
ACPI / PM: Rename acpi_power_off_device()
ACPI / PM: Drop acpi_power_nocheck
ACPI / PM: Drop acpi_bus_get_power()
Platform / x86: Make fujitsu_laptop use acpi_bus_update_power()
ACPI / Fan: Rework the handling of power resources
ACPI / PM: Register power resource devices as soon as they are needed
ACPI / PM: Register acpi_power_driver early
ACPI / PM: Add function for updating device power state consistently
ACPI / PM: Add function for device power state initialization
ACPI / PM: Introduce __acpi_bus_get_power()
ACPI / PM: Introduce function for refcounting device power resources
ACPI / PM: Add functions for manipulating lists of power resources
ACPI / PM: Prevent acpi_power_get_inferred_state() from making changes
ACPICA: Update version to 20101209
...
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/panic.c | 1 | ||||
| -rw-r--r-- | kernel/power/Kconfig | 5 | ||||
| -rw-r--r-- | kernel/power/Makefile | 1 | ||||
| -rw-r--r-- | kernel/power/nvs.c | 136 |
4 files changed, 1 insertions, 142 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index 4c13b1a88ebb..991bb87a1704 100644 --- a/kernel/panic.c +++ b/kernel/panic.c | |||
| @@ -34,6 +34,7 @@ static int pause_on_oops_flag; | |||
| 34 | static DEFINE_SPINLOCK(pause_on_oops_lock); | 34 | static DEFINE_SPINLOCK(pause_on_oops_lock); |
| 35 | 35 | ||
| 36 | int panic_timeout; | 36 | int panic_timeout; |
| 37 | EXPORT_SYMBOL_GPL(panic_timeout); | ||
| 37 | 38 | ||
| 38 | ATOMIC_NOTIFIER_HEAD(panic_notifier_list); | 39 | ATOMIC_NOTIFIER_HEAD(panic_notifier_list); |
| 39 | 40 | ||
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index a5aff3ebad38..265729966ece 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig | |||
| @@ -100,13 +100,9 @@ config PM_SLEEP_ADVANCED_DEBUG | |||
| 100 | depends on PM_ADVANCED_DEBUG | 100 | depends on PM_ADVANCED_DEBUG |
| 101 | default n | 101 | default n |
| 102 | 102 | ||
| 103 | config SUSPEND_NVS | ||
| 104 | bool | ||
| 105 | |||
| 106 | config SUSPEND | 103 | config SUSPEND |
| 107 | bool "Suspend to RAM and standby" | 104 | bool "Suspend to RAM and standby" |
| 108 | depends on PM && ARCH_SUSPEND_POSSIBLE | 105 | depends on PM && ARCH_SUSPEND_POSSIBLE |
| 109 | select SUSPEND_NVS if HAS_IOMEM | ||
| 110 | default y | 106 | default y |
| 111 | ---help--- | 107 | ---help--- |
| 112 | Allow the system to enter sleep states in which main memory is | 108 | Allow the system to enter sleep states in which main memory is |
| @@ -140,7 +136,6 @@ config HIBERNATION | |||
| 140 | depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE | 136 | depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE |
| 141 | select LZO_COMPRESS | 137 | select LZO_COMPRESS |
| 142 | select LZO_DECOMPRESS | 138 | select LZO_DECOMPRESS |
| 143 | select SUSPEND_NVS if HAS_IOMEM | ||
| 144 | ---help--- | 139 | ---help--- |
| 145 | Enable the suspend to disk (STD) functionality, which is usually | 140 | Enable the suspend to disk (STD) functionality, which is usually |
| 146 | called "hibernation" in user interfaces. STD checkpoints the | 141 | called "hibernation" in user interfaces. STD checkpoints the |
diff --git a/kernel/power/Makefile b/kernel/power/Makefile index b75597235d85..c350e18b53e3 100644 --- a/kernel/power/Makefile +++ b/kernel/power/Makefile | |||
| @@ -7,6 +7,5 @@ obj-$(CONFIG_SUSPEND) += suspend.o | |||
| 7 | obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o | 7 | obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o |
| 8 | obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \ | 8 | obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \ |
| 9 | block_io.o | 9 | block_io.o |
| 10 | obj-$(CONFIG_SUSPEND_NVS) += nvs.o | ||
| 11 | 10 | ||
| 12 | obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o | 11 | obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o |
diff --git a/kernel/power/nvs.c b/kernel/power/nvs.c deleted file mode 100644 index 1836db60bbb6..000000000000 --- a/kernel/power/nvs.c +++ /dev/null | |||
| @@ -1,136 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * linux/kernel/power/hibernate_nvs.c - Routines for handling NVS memory | ||
| 3 | * | ||
| 4 | * Copyright (C) 2008,2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc. | ||
| 5 | * | ||
| 6 | * This file is released under the GPLv2. | ||
| 7 | */ | ||
| 8 | |||
| 9 | #include <linux/io.h> | ||
| 10 | #include <linux/kernel.h> | ||
| 11 | #include <linux/list.h> | ||
| 12 | #include <linux/mm.h> | ||
| 13 | #include <linux/slab.h> | ||
| 14 | #include <linux/suspend.h> | ||
| 15 | |||
| 16 | /* | ||
| 17 | * Platforms, like ACPI, may want us to save some memory used by them during | ||
| 18 | * suspend and to restore the contents of this memory during the subsequent | ||
| 19 | * resume. The code below implements a mechanism allowing us to do that. | ||
| 20 | */ | ||
| 21 | |||
| 22 | struct nvs_page { | ||
| 23 | unsigned long phys_start; | ||
| 24 | unsigned int size; | ||
| 25 | void *kaddr; | ||
| 26 | void *data; | ||
| 27 | struct list_head node; | ||
| 28 | }; | ||
| 29 | |||
| 30 | static LIST_HEAD(nvs_list); | ||
| 31 | |||
| 32 | /** | ||
| 33 | * suspend_nvs_register - register platform NVS memory region to save | ||
| 34 | * @start - physical address of the region | ||
| 35 | * @size - size of the region | ||
| 36 | * | ||
| 37 | * The NVS region need not be page-aligned (both ends) and we arrange | ||
| 38 | * things so that the data from page-aligned addresses in this region will | ||
| 39 | * be copied into separate RAM pages. | ||
| 40 | */ | ||
| 41 | int suspend_nvs_register(unsigned long start, unsigned long size) | ||
| 42 | { | ||
| 43 | struct nvs_page *entry, *next; | ||
| 44 | |||
| 45 | while (size > 0) { | ||
| 46 | unsigned int nr_bytes; | ||
| 47 | |||
| 48 | entry = kzalloc(sizeof(struct nvs_page), GFP_KERNEL); | ||
| 49 | if (!entry) | ||
| 50 | goto Error; | ||
| 51 | |||
| 52 | list_add_tail(&entry->node, &nvs_list); | ||
| 53 | entry->phys_start = start; | ||
| 54 | nr_bytes = PAGE_SIZE - (start & ~PAGE_MASK); | ||
| 55 | entry->size = (size < nr_bytes) ? size : nr_bytes; | ||
| 56 | |||
| 57 | start += entry->size; | ||
| 58 | size -= entry->size; | ||
| 59 | } | ||
| 60 | return 0; | ||
| 61 | |||
| 62 | Error: | ||
| 63 | list_for_each_entry_safe(entry, next, &nvs_list, node) { | ||
| 64 | list_del(&entry->node); | ||
| 65 | kfree(entry); | ||
| 66 | } | ||
| 67 | return -ENOMEM; | ||
| 68 | } | ||
| 69 | |||
| 70 | /** | ||
| 71 | * suspend_nvs_free - free data pages allocated for saving NVS regions | ||
| 72 | */ | ||
| 73 | void suspend_nvs_free(void) | ||
| 74 | { | ||
| 75 | struct nvs_page *entry; | ||
| 76 | |||
| 77 | list_for_each_entry(entry, &nvs_list, node) | ||
| 78 | if (entry->data) { | ||
| 79 | free_page((unsigned long)entry->data); | ||
| 80 | entry->data = NULL; | ||
| 81 | if (entry->kaddr) { | ||
| 82 | iounmap(entry->kaddr); | ||
| 83 | entry->kaddr = NULL; | ||
| 84 | } | ||
| 85 | } | ||
| 86 | } | ||
| 87 | |||
| 88 | /** | ||
| 89 | * suspend_nvs_alloc - allocate memory necessary for saving NVS regions | ||
| 90 | */ | ||
| 91 | int suspend_nvs_alloc(void) | ||
| 92 | { | ||
| 93 | struct nvs_page *entry; | ||
| 94 | |||
| 95 | list_for_each_entry(entry, &nvs_list, node) { | ||
| 96 | entry->data = (void *)__get_free_page(GFP_KERNEL); | ||
| 97 | if (!entry->data) { | ||
| 98 | suspend_nvs_free(); | ||
| 99 | return -ENOMEM; | ||
| 100 | } | ||
| 101 | } | ||
| 102 | return 0; | ||
| 103 | } | ||
| 104 | |||
| 105 | /** | ||
| 106 | * suspend_nvs_save - save NVS memory regions | ||
| 107 | */ | ||
| 108 | void suspend_nvs_save(void) | ||
| 109 | { | ||
| 110 | struct nvs_page *entry; | ||
| 111 | |||
| 112 | printk(KERN_INFO "PM: Saving platform NVS memory\n"); | ||
| 113 | |||
| 114 | list_for_each_entry(entry, &nvs_list, node) | ||
| 115 | if (entry->data) { | ||
| 116 | entry->kaddr = ioremap(entry->phys_start, entry->size); | ||
| 117 | memcpy(entry->data, entry->kaddr, entry->size); | ||
| 118 | } | ||
| 119 | } | ||
| 120 | |||
| 121 | /** | ||
| 122 | * suspend_nvs_restore - restore NVS memory regions | ||
| 123 | * | ||
| 124 | * This function is going to be called with interrupts disabled, so it | ||
| 125 | * cannot iounmap the virtual addresses used to access the NVS region. | ||
| 126 | */ | ||
| 127 | void suspend_nvs_restore(void) | ||
| 128 | { | ||
| 129 | struct nvs_page *entry; | ||
| 130 | |||
| 131 | printk(KERN_INFO "PM: Restoring platform NVS memory\n"); | ||
| 132 | |||
| 133 | list_for_each_entry(entry, &nvs_list, node) | ||
| 134 | if (entry->data) | ||
| 135 | memcpy(entry->kaddr, entry->data, entry->size); | ||
| 136 | } | ||
