> The name is misleading and it's not really clear what is "kept". Let's just
> name it like the online_type name we expose to user space ("online").
>
> Add some documentation to the types.
>
> Reviewed-by: Wei Yang <richard.weiyang@xxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxxxx>
> Cc: Oscar Salvador <osalvador@xxxxxxx>
> Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
> Cc: Baoquan He <bhe@xxxxxxxxxx>
> Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
> ---
> drivers/base/memory.c | 9 +++++----
> include/linux/memory_hotplug.h | 6 +++++-
> 2 files changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 6448c9ece2cb..8c5ce42c0fc3 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -216,7 +216,7 @@ static int memory_subsys_online(struct device *dev)
> * attribute and need to set the online_type.
> */
> if (mem->online_type < 0)
> - mem->online_type = MMOP_ONLINE_KEEP;
> + mem->online_type = MMOP_ONLINE;
>
> ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
>
> @@ -251,7 +251,7 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr,
> else if (sysfs_streq(buf, "online_movable"))
> online_type = MMOP_ONLINE_MOVABLE;
> else if (sysfs_streq(buf, "online"))
> - online_type = MMOP_ONLINE_KEEP;
> + online_type = MMOP_ONLINE;
> else if (sysfs_streq(buf, "offline"))
> online_type = MMOP_OFFLINE;
> else {
> @@ -262,7 +262,7 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr,
> switch (online_type) {
> case MMOP_ONLINE_KERNEL:
> case MMOP_ONLINE_MOVABLE:
> - case MMOP_ONLINE_KEEP:
> + case MMOP_ONLINE:
> /* mem->online_type is protected by device_hotplug_lock */
> mem->online_type = online_type;
> ret = device_online(&mem->dev);
> @@ -342,7 +342,8 @@ static ssize_t valid_zones_show(struct device *dev,
> }
>
> nid = mem->nid;
> - default_zone = zone_for_pfn_range(MMOP_ONLINE_KEEP, nid, start_pfn, nr_pages);
> + default_zone = zone_for_pfn_range(MMOP_ONLINE, nid, start_pfn,
> + nr_pages);
> strcat(buf, default_zone->name);
>
> print_allowed_zone(buf, nid, start_pfn, nr_pages, MMOP_ONLINE_KERNEL,
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index 3195d11876ea..3aaf00db224c 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -47,9 +47,13 @@ enum {
>
> /* Types for control the zone type of onlined and offlined memory */
> enum {
> + /* Offline the memory. */
> MMOP_OFFLINE = -1,
> - MMOP_ONLINE_KEEP,
> + /* Online the memory. Zone depends, see default_zone_for_pfn(). */
> + MMOP_ONLINE,
> + /* Online the memory to ZONE_NORMAL. */
> MMOP_ONLINE_KERNEL,
> + /* Online the memory to ZONE_MOVABLE. */
> MMOP_ONLINE_MOVABLE,
> };
>
> --
Looks good to me.
Acked-by: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
> 2.24.1
>
>
