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authorRafael J. Wysocki <rjw@sisk.pl>2011-01-07 03:43:44 +0300
committerLen Brown <len.brown@intel.com>2011-01-07 08:36:55 +0300
commit976513dbfc1547c7b1822566923058655f0c32fd (patch)
tree561e658e65a0136691cc9faebbe1ddf17a3429d3
parent26fcaf60fe3861409eb4c455c5c0d0f00f599b08 (diff)
downloadlinux-976513dbfc1547c7b1822566923058655f0c32fd.tar.xz
PM / ACPI: Move NVS saving and restoring code to drivers/acpi
The saving of the ACPI NVS area during hibernation and suspend and restoring it during the subsequent resume is entirely specific to ACPI, so move it to drivers/acpi and drop the CONFIG_SUSPEND_NVS configuration option which is redundant. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--arch/x86/kernel/e820.c1
-rw-r--r--drivers/acpi/Makefile2
-rw-r--r--drivers/acpi/internal.h8
-rw-r--r--drivers/acpi/nvs.c (renamed from kernel/power/nvs.c)0
-rw-r--r--include/linux/acpi.h9
-rw-r--r--include/linux/suspend.h17
-rw-r--r--kernel/power/Kconfig5
-rw-r--r--kernel/power/Makefile1
8 files changed, 19 insertions, 24 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 0c2b7ef7a34d..294f26da0c0c 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -14,6 +14,7 @@
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/suspend.h>
+#include <linux/acpi.h>
#include <linux/firmware-map.h>
#include <linux/memblock.h>
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 3d031d02e54b..9cc9f2c4da79 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -24,7 +24,7 @@ acpi-y += atomicio.o
# sleep related files
acpi-y += wakeup.o
acpi-y += sleep.o
-acpi-$(CONFIG_ACPI_SLEEP) += proc.o
+acpi-$(CONFIG_ACPI_SLEEP) += proc.o nvs.o
#
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index a212bfeddf8c..7c23b76e8eca 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -82,8 +82,16 @@ extern int acpi_sleep_init(void);
#ifdef CONFIG_ACPI_SLEEP
int acpi_sleep_proc_init(void);
+int suspend_nvs_alloc(void);
+void suspend_nvs_free(void);
+int suspend_nvs_save(void);
+void suspend_nvs_restore(void);
#else
static inline int acpi_sleep_proc_init(void) { return 0; }
+static inline int suspend_nvs_alloc(void) { return 0; }
+static inline void suspend_nvs_free(void) {}
+static inline int suspend_nvs_save(void) {}
+static inline void suspend_nvs_restore(void) {}
#endif
#endif /* _ACPI_INTERNAL_H_ */
diff --git a/kernel/power/nvs.c b/drivers/acpi/nvs.c
index 57c6fabbb6b6..57c6fabbb6b6 100644
--- a/kernel/power/nvs.c
+++ b/drivers/acpi/nvs.c
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 67c91b4418b0..fa7ed6a983d0 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -254,6 +254,15 @@ void __init acpi_old_suspend_ordering(void);
void __init acpi_nvs_nosave(void);
#endif /* CONFIG_PM_SLEEP */
+#ifdef CONFIG_ACPI_SLEEP
+int suspend_nvs_register(unsigned long start, unsigned long size);
+#else
+static inline int suspend_nvs_register(unsigned long a, unsigned long b)
+{
+ return 0;
+}
+#endif
+
struct acpi_osc_context {
char *uuid_str; /* uuid string */
int rev;
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index acb7d911bb0c..0e288e3c37be 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -258,23 +258,6 @@ static inline int hibernate(void) { return -ENOSYS; }
static inline bool system_entering_hibernation(void) { return false; }
#endif /* CONFIG_HIBERNATION */
-#ifdef CONFIG_SUSPEND_NVS
-extern int suspend_nvs_register(unsigned long start, unsigned long size);
-extern int suspend_nvs_alloc(void);
-extern void suspend_nvs_free(void);
-extern int suspend_nvs_save(void);
-extern void suspend_nvs_restore(void);
-#else /* CONFIG_SUSPEND_NVS */
-static inline int suspend_nvs_register(unsigned long a, unsigned long b)
-{
- return 0;
-}
-static inline int suspend_nvs_alloc(void) { return 0; }
-static inline void suspend_nvs_free(void) {}
-static inline int suspend_nvs_save(void) {}
-static inline void suspend_nvs_restore(void) {}
-#endif /* CONFIG_SUSPEND_NVS */
-
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
void restore_processor_state(void);
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
depends on PM_ADVANCED_DEBUG
default n
-config SUSPEND_NVS
- bool
-
config SUSPEND
bool "Suspend to RAM and standby"
depends on PM && ARCH_SUSPEND_POSSIBLE
- select SUSPEND_NVS if HAS_IOMEM
default y
---help---
Allow the system to enter sleep states in which main memory is
@@ -140,7 +136,6 @@ config HIBERNATION
depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE
select LZO_COMPRESS
select LZO_DECOMPRESS
- select SUSPEND_NVS if HAS_IOMEM
---help---
Enable the suspend to disk (STD) functionality, which is usually
called "hibernation" in user interfaces. STD checkpoints the
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index f9063c6b185d..120a15823325 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -10,6 +10,5 @@ obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o
obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \
block_io.o
-obj-$(CONFIG_SUSPEND_NVS) += nvs.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o