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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/memory.h
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@@ -25,15 +25,10 @@
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 struct memory_block {
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 	unsigned long start_section_nr;
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-	unsigned long end_section_nr;
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 	unsigned long state;		/* serialized by the dev->lock */
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-	int section_count;		/* serialized by mem_sysfs_mutex */
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 	int online_type;		/* for passing data to online routine */
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-	int phys_device;		/* to which fru does this belong? */
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-	void *hw;			/* optional pointer to fw/hw data */
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-	int (*phys_callback)(struct memory_block *);
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-	struct device dev;
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 	int nid;			/* NID for this memory block */
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+	struct device dev;
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 };
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 int arch_get_memory_phys_device(unsigned long start_pfn);
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@@ -56,19 +51,6 @@
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 	int status_change_nid;
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 };
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-/*
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- * During pageblock isolation, count the number of pages within the
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- * range [start_pfn, start_pfn + nr_pages) which are owned by code
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- * in the notifier chain.
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- */
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-#define MEM_ISOLATE_COUNT	(1<<0)
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-
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-struct memory_isolate_notify {
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-	unsigned long start_pfn;	/* Start of range to check */
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-	unsigned int nr_pages;		/* # pages in range to check */
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-	unsigned int pages_found;	/* # pages owned found by callbacks */
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-};
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-
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 struct notifier_block;
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 struct mem_section;
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@@ -80,9 +62,9 @@
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 #define IPC_CALLBACK_PRI        10
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 #ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
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-static inline int memory_dev_init(void)
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+static inline void memory_dev_init(void)
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 {
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-	return 0;
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+	return;
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 }
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 static inline int register_memory_notifier(struct notifier_block *nb)
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 {
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@@ -95,31 +77,17 @@
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 {
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 	return 0;
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 }
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-static inline int register_memory_isolate_notifier(struct notifier_block *nb)
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-{
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-	return 0;
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-}
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-static inline void unregister_memory_isolate_notifier(struct notifier_block *nb)
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-{
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-}
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-static inline int memory_isolate_notify(unsigned long val, void *v)
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-{
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-	return 0;
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-}
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 #else
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 extern int register_memory_notifier(struct notifier_block *nb);
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 extern void unregister_memory_notifier(struct notifier_block *nb);
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-extern int register_memory_isolate_notifier(struct notifier_block *nb);
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-extern void unregister_memory_isolate_notifier(struct notifier_block *nb);
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 int create_memory_block_devices(unsigned long start, unsigned long size);
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 void remove_memory_block_devices(unsigned long start, unsigned long size);
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-extern int memory_dev_init(void);
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+extern void memory_dev_init(void);
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 extern int memory_notify(unsigned long val, void *v);
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-extern int memory_isolate_notify(unsigned long val, void *v);
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-extern struct memory_block *find_memory_block_hinted(struct mem_section *,
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-							struct memory_block *);
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 extern struct memory_block *find_memory_block(struct mem_section *);
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 typedef int (*walk_memory_blocks_func_t)(struct memory_block *, void *);
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+extern int walk_memory_blocks(unsigned long start, unsigned long size,
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+			      void *arg, walk_memory_blocks_func_t func);
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 extern int for_each_memory_block(void *arg, walk_memory_blocks_func_t func);
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 #define CONFIG_MEM_BLOCK_SIZE	(PAGES_PER_SECTION<<PAGE_SHIFT)
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 #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */