PM / Hibernate: Introduce CONFIG_HIBERNATE_INTERFACE

Commit Message

Rafael Wysocki March 26, 2011, 11:29 a.m. UTC

None

Patch

Index: linux-2.6/kernel/power/Kconfig
===================================================================
--- linux-2.6.orig/kernel/power/Kconfig
+++ linux-2.6/kernel/power/Kconfig
@@ -19,8 +19,12 @@  config SUSPEND_FREEZER
 	  Turning OFF this setting is NOT recommended! If in doubt, say Y.
 
 config HIBERNATION
+	bool
+
+config HIBERNATE_INTERFACE
 	bool "Hibernation (aka 'suspend to disk')"
 	depends on SWAP && ARCH_HIBERNATION_POSSIBLE
+	select HIBERNATION
 	select LZO_COMPRESS
 	select LZO_DECOMPRESS
 	---help---
Index: linux-2.6/kernel/power/Makefile
===================================================================
--- linux-2.6.orig/kernel/power/Makefile
+++ linux-2.6/kernel/power/Makefile
@@ -6,7 +6,7 @@  obj-$(CONFIG_PM_SLEEP)		+= console.o
 obj-$(CONFIG_FREEZER)		+= process.o
 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_HIBERNATE_INTERFACE)	+= hibernate.o snapshot.o swap.o \
+						user.o block_io.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o
Index: linux-2.6/include/linux/suspend.h
===================================================================
--- linux-2.6.orig/include/linux/suspend.h
+++ linux-2.6/include/linux/suspend.h
@@ -229,7 +229,7 @@  struct platform_hibernation_ops {
 	void (*recover)(void);
 };
 
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
 /* kernel/power/snapshot.c */
 extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
 static inline void __init register_nosave_region(unsigned long b, unsigned long e)
@@ -248,7 +248,9 @@  extern unsigned long get_safe_page(gfp_t
 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
 extern int hibernate(void);
 extern bool system_entering_hibernation(void);
-#else /* CONFIG_HIBERNATION */
+#else /* !CONFIG_HIBERNATE_INTERFACE */
+static inline void register_nosave_region(unsigned long b, unsigned long e) {}
+static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
 static inline void swsusp_set_page_free(struct page *p) {}
 static inline void swsusp_unset_page_free(struct page *p) {}
@@ -256,7 +258,7 @@  static inline void swsusp_unset_page_fre
 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {}
 static inline int hibernate(void) { return -ENOSYS; }
 static inline bool system_entering_hibernation(void) { return false; }
-#endif /* CONFIG_HIBERNATION */
+#endif /* !CONFIG_HIBERNATE_INTERFACE */
 
 #ifdef CONFIG_PM_SLEEP
 void save_processor_state(void);
@@ -298,13 +300,6 @@  static inline bool pm_wakeup_pending(voi
 extern struct mutex pm_mutex;
 
 #ifndef CONFIG_HIBERNATION
-static inline void register_nosave_region(unsigned long b, unsigned long e)
-{
-}
-static inline void register_nosave_region_late(unsigned long b, unsigned long e)
-{
-}
-
 static inline void lock_system_sleep(void) {}
 static inline void unlock_system_sleep(void) {}
 
Index: linux-2.6/arch/x86/power/Makefile
===================================================================
--- linux-2.6.orig/arch/x86/power/Makefile
+++ linux-2.6/arch/x86/power/Makefile
@@ -4,4 +4,5 @@  nostackp := $(call cc-option, -fno-stack
 CFLAGS_cpu.o	:= $(nostackp)
 
 obj-$(CONFIG_PM_SLEEP)		+= cpu.o
-obj-$(CONFIG_HIBERNATION)	+= hibernate_$(BITS).o hibernate_asm_$(BITS).o
+obj-$(CONFIG_HIBERNATE_INTERFACE)	+= hibernate_$(BITS).o \
+						hibernate_asm_$(BITS).o
Index: linux-2.6/kernel/power/main.c
===================================================================
--- linux-2.6.orig/kernel/power/main.c
+++ linux-2.6/kernel/power/main.c
@@ -156,7 +156,7 @@  static ssize_t state_show(struct kobject
 			s += sprintf(s,"%s ", pm_states[i]);
 	}
 #endif
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
 	s += sprintf(s, "%s\n", "disk");
 #else
 	if (s != buf)
Index: linux-2.6/kernel/power/power.h
===================================================================
--- linux-2.6.orig/kernel/power/power.h
+++ linux-2.6/kernel/power/power.h
@@ -13,7 +13,7 @@  struct swsusp_info {
 	unsigned long		size;
 } __attribute__((aligned(PAGE_SIZE)));
 
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_INTERFACE
 /* kernel/power/snapshot.c */
 extern void __init hibernate_image_size_init(void);
 
@@ -53,10 +53,10 @@  extern int hibernation_snapshot(int plat
 extern int hibernation_restore(int platform_mode);
 extern int hibernation_platform_enter(void);
 
-#else /* !CONFIG_HIBERNATION */
+#else /* !CONFIG_HIBERNATE_INTERFACE */
 
 static inline void hibernate_image_size_init(void) {}
-#endif /* !CONFIG_HIBERNATION */
+#endif /* !CONFIG_HIBERNATE_INTERFACE */
 
 extern int pfn_is_nosave(unsigned long);