summaryrefslogtreecommitdiff
path: root/drivers/base/memory.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/base/memory.c')
-rw-r--r--drivers/base/memory.c35
1 files changed, 22 insertions, 13 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 25425d3f2..213456c2b 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -450,8 +450,7 @@ memory_probe_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u64 phys_addr;
- int nid;
- int i, ret;
+ int nid, ret;
unsigned long pages_per_block = PAGES_PER_SECTION * sections_per_block;
ret = kstrtoull(buf, 0, &phys_addr);
@@ -461,15 +460,12 @@ memory_probe_store(struct device *dev, struct device_attribute *attr,
if (phys_addr & ((pages_per_block << PAGE_SHIFT) - 1))
return -EINVAL;
- for (i = 0; i < sections_per_block; i++) {
- nid = memory_add_physaddr_to_nid(phys_addr);
- ret = add_memory(nid, phys_addr,
- PAGES_PER_SECTION << PAGE_SHIFT);
- if (ret)
- goto out;
+ nid = memory_add_physaddr_to_nid(phys_addr);
+ ret = add_memory(nid, phys_addr,
+ MIN_MEMORY_BLOCK_SIZE * sections_per_block);
- phys_addr += MIN_MEMORY_BLOCK_SIZE;
- }
+ if (ret)
+ goto out;
ret = count;
out:
@@ -618,7 +614,6 @@ static int init_memory_block(struct memory_block **memory,
base_memory_block_id(scn_nr) * sections_per_block;
mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
mem->state = state;
- mem->section_count++;
start_pfn = section_nr_to_pfn(mem->start_section_nr);
mem->phys_device = arch_get_memory_phys_device(start_pfn);
@@ -652,6 +647,13 @@ static int add_memory_block(int base_section_nr)
return 0;
}
+static bool is_zone_device_section(struct mem_section *ms)
+{
+ struct page *page;
+
+ page = sparse_decode_mem_map(ms->section_mem_map, __section_nr(ms));
+ return is_zone_device_page(page);
+}
/*
* need an interface for the VM to add new memory regions,
@@ -662,6 +664,9 @@ 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);
@@ -672,6 +677,7 @@ int register_new_memory(int nid, struct mem_section *section)
ret = init_memory_block(&mem, section, MEM_OFFLINE);
if (ret)
goto out;
+ mem->section_count++;
}
if (mem->section_count == sections_per_block)
@@ -692,11 +698,14 @@ unregister_memory(struct memory_block *memory)
device_unregister(&memory->dev);
}
-static int remove_memory_block(unsigned long node_id,
+static int remove_memory_section(unsigned long node_id,
struct mem_section *section, int phys_device)
{
struct memory_block *mem;
+ if (is_zone_device_section(section))
+ return 0;
+
mutex_lock(&mem_sysfs_mutex);
mem = find_memory_block(section);
unregister_mem_sect_under_nodes(mem, __section_nr(section));
@@ -716,7 +725,7 @@ int unregister_memory_section(struct mem_section *section)
if (!present_section(section))
return -EINVAL;
- return remove_memory_block(0, section, 0);
+ return remove_memory_section(0, section, 0);
}
#endif /* CONFIG_MEMORY_HOTREMOVE */