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-rw-r--r--drivers/base/memory.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 937e825..855ed1a 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -92,7 +92,8 @@ unregister_memory(struct memory_block *memory, struct mem_section *section)
* uses.
*/
-static ssize_t show_mem_phys_index(struct sys_device *dev, char *buf)
+static ssize_t show_mem_phys_index(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
{
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
@@ -100,9 +101,25 @@ static ssize_t show_mem_phys_index(struct sys_device *dev, char *buf)
}
/*
+ * Show whether the section of memory is likely to be hot-removable
+ */
+static ssize_t show_mem_removable(struct sys_device *dev, char *buf)
+{
+ unsigned long start_pfn;
+ int ret;
+ struct memory_block *mem =
+ container_of(dev, struct memory_block, sysdev);
+
+ start_pfn = section_nr_to_pfn(mem->phys_index);
+ ret = is_mem_section_removable(start_pfn, PAGES_PER_SECTION);
+ return sprintf(buf, "%d\n", ret);
+}
+
+/*
* online, offline, going offline, etc.
*/
-static ssize_t show_mem_state(struct sys_device *dev, char *buf)
+static ssize_t show_mem_state(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
{
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
@@ -217,7 +234,8 @@ out:
}
static ssize_t
-store_mem_state(struct sys_device *dev, const char *buf, size_t count)
+store_mem_state(struct sys_device *dev,
+ struct sysdev_attribute *attr, const char *buf, size_t count)
{
struct memory_block *mem;
unsigned int phys_section_nr;
@@ -248,7 +266,8 @@ out:
* s.t. if I offline all of these sections I can then
* remove the physical device?
*/
-static ssize_t show_phys_device(struct sys_device *dev, char *buf)
+static ssize_t show_phys_device(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
{
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
@@ -258,6 +277,7 @@ static ssize_t show_phys_device(struct sys_device *dev, char *buf)
static SYSDEV_ATTR(phys_index, 0444, show_mem_phys_index, NULL);
static SYSDEV_ATTR(state, 0644, show_mem_state, store_mem_state);
static SYSDEV_ATTR(phys_device, 0444, show_phys_device, NULL);
+static SYSDEV_ATTR(removable, 0444, show_mem_removable, NULL);
#define mem_create_simple_file(mem, attr_name) \
sysdev_create_file(&mem->sysdev, &attr_##attr_name)
@@ -346,6 +366,8 @@ static int add_memory_block(unsigned long node_id, struct mem_section *section,
ret = mem_create_simple_file(mem, state);
if (!ret)
ret = mem_create_simple_file(mem, phys_device);
+ if (!ret)
+ ret = mem_create_simple_file(mem, removable);
return ret;
}
@@ -390,6 +412,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
mem_remove_simple_file(mem, phys_index);
mem_remove_simple_file(mem, state);
mem_remove_simple_file(mem, phys_device);
+ mem_remove_simple_file(mem, removable);
unregister_memory(mem, section);
return 0;
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