mem-hotplug: introduce MMOP_OFFLINE to replace the hard coding -1
In store_mem_state(), we have: ... 334 else if (!strncmp(buf, "offline", min_t(int, count, 7))) 335 online_type = -1; ... 355 case -1: 356 ret = device_offline(&mem->dev); 357 break; ... Here, "offline" is hard coded as -1. This patch does the following renaming: ONLINE_KEEP -> MMOP_ONLINE_KEEP ONLINE_KERNEL -> MMOP_ONLINE_KERNEL ONLINE_MOVABLE -> MMOP_ONLINE_MOVABLE and introduces MMOP_OFFLINE = -1 to avoid hard coding. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Cc: Hu Tao <hutao@cn.fujitsu.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1f6a6cc82e
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@ -284,7 +284,7 @@ static int memory_subsys_online(struct device *dev)
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* attribute and need to set the online_type.
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*/
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if (mem->online_type < 0)
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mem->online_type = ONLINE_KEEP;
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mem->online_type = MMOP_ONLINE_KEEP;
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ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
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@ -316,22 +316,22 @@ store_mem_state(struct device *dev,
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return ret;
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if (sysfs_streq(buf, "online_kernel"))
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online_type = ONLINE_KERNEL;
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online_type = MMOP_ONLINE_KERNEL;
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else if (sysfs_streq(buf, "online_movable"))
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online_type = ONLINE_MOVABLE;
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online_type = MMOP_ONLINE_MOVABLE;
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else if (sysfs_streq(buf, "online"))
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online_type = ONLINE_KEEP;
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online_type = MMOP_ONLINE_KEEP;
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else if (sysfs_streq(buf, "offline"))
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online_type = -1;
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online_type = MMOP_OFFLINE;
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else {
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ret = -EINVAL;
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goto err;
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}
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switch (online_type) {
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case ONLINE_KERNEL:
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case ONLINE_MOVABLE:
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case ONLINE_KEEP:
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case MMOP_ONLINE_KERNEL:
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case MMOP_ONLINE_MOVABLE:
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case MMOP_ONLINE_KEEP:
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/*
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* mem->online_type is not protected so there can be a
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* race here. However, when racing online, the first
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@ -342,7 +342,7 @@ store_mem_state(struct device *dev,
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mem->online_type = online_type;
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ret = device_online(&mem->dev);
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break;
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case -1:
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case MMOP_OFFLINE:
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ret = device_offline(&mem->dev);
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break;
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default:
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@ -26,11 +26,12 @@ enum {
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MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
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};
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/* Types for control the zone type of onlined memory */
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/* Types for control the zone type of onlined and offlined memory */
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enum {
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ONLINE_KEEP,
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ONLINE_KERNEL,
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ONLINE_MOVABLE,
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MMOP_OFFLINE = -1,
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MMOP_ONLINE_KEEP,
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MMOP_ONLINE_KERNEL,
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MMOP_ONLINE_MOVABLE,
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};
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/*
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@ -977,15 +977,18 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
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zone = page_zone(pfn_to_page(pfn));
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ret = -EINVAL;
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if ((zone_idx(zone) > ZONE_NORMAL || online_type == ONLINE_MOVABLE) &&
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if ((zone_idx(zone) > ZONE_NORMAL ||
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online_type == MMOP_ONLINE_MOVABLE) &&
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!can_online_high_movable(zone))
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goto out;
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if (online_type == ONLINE_KERNEL && zone_idx(zone) == ZONE_MOVABLE) {
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if (online_type == MMOP_ONLINE_KERNEL &&
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zone_idx(zone) == ZONE_MOVABLE) {
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if (move_pfn_range_left(zone - 1, zone, pfn, pfn + nr_pages))
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goto out;
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}
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if (online_type == ONLINE_MOVABLE && zone_idx(zone) == ZONE_MOVABLE - 1) {
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if (online_type == MMOP_ONLINE_MOVABLE &&
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zone_idx(zone) == ZONE_MOVABLE - 1) {
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if (move_pfn_range_right(zone, zone + 1, pfn, pfn + nr_pages))
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goto out;
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}
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