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Release 4.12 include/linux/memory.h

Directory: include/linux
/*
 * include/linux/memory.h - generic memory definition
 *
 * This is mainly for topological representation. We define the
 * basic "struct memory_block" here, which can be embedded in per-arch
 * definitions or NUMA information.
 *
 * Basic handling of the devices is done in drivers/base/memory.c
 * and system devices are handled in drivers/base/sys.c.
 *
 * Memory block are exported via sysfs in the class/memory/devices/
 * directory.
 *
 */
#ifndef _LINUX_MEMORY_H_

#define _LINUX_MEMORY_H_

#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/mutex.h>
#include <linux/notifier.h>


#define MIN_MEMORY_BLOCK_SIZE     (1UL << SECTION_SIZE_BITS)


struct memory_block {
	
unsigned long start_section_nr;
	
unsigned long end_section_nr;
	
unsigned long state;		/* serialized by the dev->lock */
	
int section_count;		/* serialized by mem_sysfs_mutex */
	
int online_type;		/* for passing data to online routine */
	
int phys_device;		/* to which fru does this belong? */
	
void *hw;			/* optional pointer to fw/hw data */
	
int (*phys_callback)(struct memory_block *);
	
struct device dev;
};

int arch_get_memory_phys_device(unsigned long start_pfn);
unsigned long memory_block_size_bytes(void);

/* These states are exposed to userspace as text strings in sysfs */

#define	MEM_ONLINE		(1<<0) 
/* exposed to userspace */

#define	MEM_GOING_OFFLINE	(1<<1) 
/* exposed to userspace */

#define	MEM_OFFLINE		(1<<2) 
/* exposed to userspace */

#define	MEM_GOING_ONLINE	(1<<3)

#define	MEM_CANCEL_ONLINE	(1<<4)

#define	MEM_CANCEL_OFFLINE	(1<<5)


struct memory_notify {
	
unsigned long start_pfn;
	
unsigned long nr_pages;
	
int status_change_nid_normal;
	
int status_change_nid_high;
	
int status_change_nid;
};

/*
 * During pageblock isolation, count the number of pages within the
 * range [start_pfn, start_pfn + nr_pages) which are owned by code
 * in the notifier chain.
 */

#define MEM_ISOLATE_COUNT	(1<<0)


struct memory_isolate_notify {
	
unsigned long start_pfn;	/* Start of range to check */
	
unsigned int nr_pages;		/* # pages in range to check */
	
unsigned int pages_found;	/* # pages owned found by callbacks */
};

struct notifier_block;
struct mem_section;

/*
 * Priorities for the hotplug memory callback routines (stored in decreasing
 * order in the callback chain)
 */

#define SLAB_CALLBACK_PRI       1

#define IPC_CALLBACK_PRI        10

#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE

static inline int memory_dev_init(void) { return 0; }

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static inline int register_memory_notifier(struct notifier_block *nb) { return 0; }

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Dave Hansen15100.00%1100.00%
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static inline void unregister_memory_notifier(struct notifier_block *nb) { }

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Dave Hansen11100.00%1100.00%
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static inline int memory_notify(unsigned long val, void *v) { return 0; }

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Yasunori Goto18100.00%1100.00%
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static inline int register_memory_isolate_notifier(struct notifier_block *nb) { return 0; }

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Robert Jennings15100.00%1100.00%
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static inline void unregister_memory_isolate_notifier(struct notifier_block *nb) { }

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Robert Jennings11100.00%1100.00%
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static inline int memory_isolate_notify(unsigned long val, void *v) { return 0; }

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#else extern int register_memory_notifier(struct notifier_block *nb); extern void unregister_memory_notifier(struct notifier_block *nb); extern int register_memory_isolate_notifier(struct notifier_block *nb); extern void unregister_memory_isolate_notifier(struct notifier_block *nb); extern int register_new_memory(int, struct mem_section *); #ifdef CONFIG_MEMORY_HOTREMOVE extern int unregister_memory_section(struct mem_section *); #endif extern int memory_dev_init(void); extern int memory_notify(unsigned long val, void *v); extern int memory_isolate_notify(unsigned long val, void *v); extern struct memory_block *find_memory_block_hinted(struct mem_section *, struct memory_block *); extern struct memory_block *find_memory_block(struct mem_section *); #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ #ifdef CONFIG_MEMORY_HOTPLUG #define hotplug_memory_notifier(fn, pri) ({ \ static __meminitdata struct notifier_block fn##_mem_nb =\ { .notifier_call = fn, .priority = pri };\ register_memory_notifier(&fn##_mem_nb); \ }) #define register_hotmemory_notifier(nb) register_memory_notifier(nb) #define unregister_hotmemory_notifier(nb) unregister_memory_notifier(nb) #else #define hotplug_memory_notifier(fn, pri) ({ 0; }) /* These aren't inline functions due to a GCC bug. */ #define register_hotmemory_notifier(nb) ({ (void)(nb); 0; }) #define unregister_hotmemory_notifier(nb) ({ (void)(nb); }) #endif /* * Kernel text modification mutex, used for code patching. Users of this lock * can sleep. */ extern struct mutex text_mutex; #endif /* _LINUX_MEMORY_H_ */

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Dave Hansen15532.49%14.00%
Robert Jennings10221.38%14.00%
Yasunori Goto8918.66%28.00%
Andrew Morton336.92%14.00%
Robin Holt153.14%14.00%
Gary Hade132.73%14.00%
Nadia Derbey91.89%28.00%
Nathan Fontenot81.68%28.00%
Heiko Carstens81.68%14.00%
Rashika Kheria71.47%14.00%
Lai Jiangshan61.26%28.00%
Mathieu Desnoyers61.26%14.00%
Tim Schmielau61.26%14.00%
Seth Jennings51.05%14.00%
David Rientjes51.05%14.00%
Benjamin Herrenschmidt30.63%14.00%
Keith Mannthey20.42%14.00%
Kay Sievers20.42%14.00%
Vincent Stehlé10.21%14.00%
Daniel Walker10.21%14.00%
Jianguo Wu10.21%14.00%
Total477100.00%25100.00%
Directory: include/linux
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