C++ (Cpp) find_memory_block Examples

Example #1

File: node.c Project: AdrianHuang/uclinux-robutest

static int link_mem_sections(int nid)
{
	unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn;
	unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages;
	unsigned long pfn;
	int err = 0;

	for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
		unsigned long section_nr = pfn_to_section_nr(pfn);
		struct mem_section *mem_sect;
		struct memory_block *mem_blk;
		int ret;

		if (!present_section_nr(section_nr))
			continue;
		mem_sect = __nr_to_section(section_nr);
		mem_blk = find_memory_block(mem_sect);
		ret = register_mem_sect_under_node(mem_blk, nid);
		if (!err)
			err = ret;

		/* discard ref obtained in find_memory_block() */
		kobject_put(&mem_blk->sysdev.kobj);
	}
	return err;
}

Example #2

File: memory.c Project: 125radheyshyam/linux-1

/*
 * need an interface for the VM to add new memory regions,
 * but without onlining it.
 */
int register_new_memory(int nid, struct mem_section *section)
{
	int ret = 0;
	struct memory_block *mem;

	if (is_zone_device_section(section))
		return 0;

	mutex_lock(&mem_sysfs_mutex);

	mem = find_memory_block(section);
	if (mem) {
		mem->section_count++;
		put_device(&mem->dev);
	} else {
		ret = init_memory_block(&mem, section, MEM_OFFLINE);
		if (ret)
			goto out;
		mem->section_count++;
	}

	if (mem->section_count == sections_per_block)
		ret = register_mem_sect_under_node(mem, nid);
out:
	mutex_unlock(&mem_sysfs_mutex);
	return ret;
}

Example #3

File: hotplug-memory.c Project: asmalldev/linux

static struct memory_block *lmb_to_memblock(struct of_drconf_cell *lmb)
{
	unsigned long section_nr;
	struct mem_section *mem_sect;
	struct memory_block *mem_block;

	section_nr = pfn_to_section_nr(PFN_DOWN(lmb->base_addr));
	mem_sect = __nr_to_section(section_nr);

	mem_block = find_memory_block(mem_sect);
	return mem_block;
}

Example #4

File: memory.c Project: fromfuture/Elizium

static int remove_memory_block(unsigned long node_id,
			       struct mem_section *section, int phys_device)
{
	struct memory_block *mem;

	mutex_lock(&mem_sysfs_mutex);
	mem = find_memory_block(section);
	unregister_mem_sect_under_nodes(mem, __section_nr(section));

	mem->section_count--;
	if (mem->section_count == 0)
		unregister_memory(mem);
	else
		put_device(&mem->dev);

	mutex_unlock(&mem_sysfs_mutex);
	return 0;
}

Example #5

File: memory.c Project: openube/android_kernel_sony_c2305

static int add_memory_section(int nid, struct mem_section *section,
			struct memory_block **mem_p,
			unsigned long state, enum mem_add_context context)
{
	struct memory_block *mem = NULL;
	int scn_nr = __section_nr(section);
	int ret = 0;

	mutex_lock(&mem_sysfs_mutex);

	if (context == BOOT) {
		/* same memory block ? */
		if (mem_p && *mem_p)
			if (scn_nr >= (*mem_p)->start_section_nr &&
			    scn_nr <= (*mem_p)->end_section_nr) {
				mem = *mem_p;
				kobject_get(&mem->dev.kobj);
			}
	} else
		mem = find_memory_block(section);

	if (mem) {
		mem->section_count++;
		kobject_put(&mem->dev.kobj);
	} else {
		ret = init_memory_block(&mem, section, state);
		/* store memory_block pointer for next loop */
		if (!ret && context == BOOT)
			if (mem_p)
				*mem_p = mem;
	}

	if (!ret) {
		if (context == HOTPLUG &&
		    mem->section_count == sections_per_block)
			ret = register_mem_sect_under_node(mem, nid);
	}

	mutex_unlock(&mem_sysfs_mutex);
	return ret;
}

Example #6

int remove_memory_block(unsigned long node_id, struct mem_section *section,
		int phys_device)
{
	struct memory_block *mem;

	mutex_lock(&mem_sysfs_mutex);
	mem = find_memory_block(section);
	unregister_mem_sect_under_nodes(mem, __section_nr(section));

	mem->section_count--;
	if (mem->section_count == 0) {
		mem_remove_simple_file(mem, phys_index);
		mem_remove_simple_file(mem, end_phys_index);
		mem_remove_simple_file(mem, state);
		mem_remove_simple_file(mem, phys_device);
		mem_remove_simple_file(mem, removable);
		unregister_memory(mem);
		kfree(mem);
	} else
		kobject_put(&mem->dev.kobj);

	mutex_unlock(&mem_sysfs_mutex);
	return 0;
}

Example #7

static int add_memory_section(int nid, struct mem_section *section,
			unsigned long state, enum mem_add_context context)
{
	struct memory_block *mem;
	int ret = 0;

	mutex_lock(&mem_sysfs_mutex);

	mem = find_memory_block(section);
	if (mem) {
		mem->section_count++;
		kobject_put(&mem->dev.kobj);
	} else
		ret = init_memory_block(&mem, section, state);

	if (!ret) {
		if (context == HOTPLUG &&
		    mem->section_count == sections_per_block)
			ret = register_mem_sect_under_node(mem, nid);
	}

	mutex_unlock(&mem_sysfs_mutex);
	return ret;
}