mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
b792de39d8
Fix compilation with CONFIG_MEMORY_HOTPLUG=y and gcc41. Also remove unneeded declations, add a public function. drivers/base/memory.c:53: error: static declaration of 'register_memory_notifier' follows non-static declaration include/linux/memory.h:85: error: previous declaration of 'register_memory_notifier' was here drivers/base/memory.c:58: error: static declaration of 'unregister_memory_notifier' follows non-static declaration include/linux/memory.h:86: error: previous declaration of 'unregister_memory_notifier' was here drivers/base/memory.c:68: error: static declaration of 'register_memory' follows non-static declaration include/linux/memory.h:73: error: previous declaration of 'register_memory' was here Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
|
|
* 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/sysdev.h>
|
|
#include <linux/node.h>
|
|
#include <linux/compiler.h>
|
|
|
|
#include <asm/semaphore.h>
|
|
|
|
struct memory_block {
|
|
unsigned long phys_index;
|
|
unsigned long state;
|
|
/*
|
|
* This serializes all state change requests. It isn't
|
|
* held during creation because the control files are
|
|
* created long after the critical areas during
|
|
* initialization.
|
|
*/
|
|
struct semaphore state_sem;
|
|
int phys_device; /* to which fru does this belong? */
|
|
void *hw; /* optional pointer to fw/hw data */
|
|
int (*phys_callback)(struct memory_block *);
|
|
struct sys_device sysdev;
|
|
};
|
|
|
|
/* 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 */
|
|
|
|
/*
|
|
* All of these states are currently kernel-internal for notifying
|
|
* kernel components and architectures.
|
|
*
|
|
* For MEM_MAPPING_INVALID, all notifier chains with priority >0
|
|
* are called before pfn_to_page() becomes invalid. The priority=0
|
|
* entry is reserved for the function that actually makes
|
|
* pfn_to_page() stop working. Any notifiers that want to be called
|
|
* after that should have priority <0.
|
|
*/
|
|
#define MEM_MAPPING_INVALID (1<<3)
|
|
|
|
struct notifier_block;
|
|
struct mem_section;
|
|
|
|
#ifndef CONFIG_MEMORY_HOTPLUG
|
|
static inline int memory_dev_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int register_memory_notifier(struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void unregister_memory_notifier(struct notifier_block *nb)
|
|
{
|
|
}
|
|
#else
|
|
extern int register_new_memory(struct mem_section *);
|
|
extern int unregister_memory_section(struct mem_section *);
|
|
extern int memory_dev_init(void);
|
|
extern int remove_memory_block(unsigned long, struct mem_section *, int);
|
|
|
|
#define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT)
|
|
|
|
struct notifier_block;
|
|
|
|
#endif /* CONFIG_MEMORY_HOTPLUG */
|
|
|
|
#define hotplug_memory_notifier(fn, pri) { \
|
|
static struct notifier_block fn##_mem_nb = \
|
|
{ .notifier_call = fn, .priority = pri }; \
|
|
register_memory_notifier(&fn##_mem_nb); \
|
|
}
|
|
|
|
#endif /* _LINUX_MEMORY_H_ */
|