linux-kernel - [PATCH v1] mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE

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Date:   Tue, 26 Jan 2021 12:58:29 +0100
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Pankaj Gupta <pankaj.gupta.linux@...il.com>,
        Michal Hocko <mhocko@...nel.org>,
        Oscar Salvador <osalvador@...e.de>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Wei Yang <richard.weiyang@...ux.alibaba.com>,
        linux-hyperv@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        xen-devel@...ts.xenproject.org
Subject: [PATCH v1] mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE_RESOURCE

Let's make "MEMHP_MERGE_RESOURCE" consistent with "MHP_NONE", "mhp_t" and
"mhp_flags". As discussed recently [1], "mhp" is our internal
acronym for memory hotplug now.

[1] https://lore.kernel.org/linux-mm/c37de2d0-28a1-4f7d-f944-cfd7d81c334d@redhat.com/

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: Stephen Hemminger <sthemmin@...rosoft.com>
Cc: Wei Liu <wei.liu@...nel.org>
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc: Juergen Gross <jgross@...e.com>
Cc: Stefano Stabellini <sstabellini@...nel.org>
Cc: Pankaj Gupta <pankaj.gupta.linux@...il.com>
Cc: Michal Hocko <mhocko@...nel.org>
Cc: Oscar Salvador <osalvador@...e.de>
Cc: Anshuman Khandual <anshuman.khandual@....com>
Cc: Wei Yang <richard.weiyang@...ux.alibaba.com>
Cc: linux-hyperv@...r.kernel.org
Cc: virtualization@...ts.linux-foundation.org
Cc: xen-devel@...ts.xenproject.org
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 drivers/hv/hv_balloon.c        | 2 +-
 drivers/virtio/virtio_mem.c    | 2 +-
 drivers/xen/balloon.c          | 2 +-
 include/linux/memory_hotplug.h | 2 +-
 mm/memory_hotplug.c            | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 8c471823a5af..2f776d78e3c1 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -726,7 +726,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
 
 		nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn));
 		ret = add_memory(nid, PFN_PHYS((start_pfn)),
-				(HA_CHUNK << PAGE_SHIFT), MEMHP_MERGE_RESOURCE);
+				(HA_CHUNK << PAGE_SHIFT), MHP_MERGE_RESOURCE);
 
 		if (ret) {
 			pr_err("hot_add memory failed error is %d\n", ret);
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 85a272c9978e..148bea39b09a 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -623,7 +623,7 @@ static int virtio_mem_add_memory(struct virtio_mem *vm, uint64_t addr,
 	/* Memory might get onlined immediately. */
 	atomic64_add(size, &vm->offline_size);
 	rc = add_memory_driver_managed(vm->nid, addr, size, vm->resource_name,
-				       MEMHP_MERGE_RESOURCE);
+				       MHP_MERGE_RESOURCE);
 	if (rc) {
 		atomic64_sub(size, &vm->offline_size);
 		dev_warn(&vm->vdev->dev, "adding memory failed: %d\n", rc);
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index b57b2067ecbf..671c71245a7b 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -331,7 +331,7 @@ static enum bp_state reserve_additional_memory(void)
 	mutex_unlock(&balloon_mutex);
 	/* add_memory_resource() requires the device_hotplug lock */
 	lock_device_hotplug();
-	rc = add_memory_resource(nid, resource, MEMHP_MERGE_RESOURCE);
+	rc = add_memory_resource(nid, resource, MHP_MERGE_RESOURCE);
 	unlock_device_hotplug();
 	mutex_lock(&balloon_mutex);
 
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 3d99de0db2dd..4b834f5d032e 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -53,7 +53,7 @@ typedef int __bitwise mhp_t;
  * with this flag set, the resource pointer must no longer be used as it
  * might be stale, or the resource might have changed.
  */
-#define MEMHP_MERGE_RESOURCE	((__force mhp_t)BIT(0))
+#define MHP_MERGE_RESOURCE	((__force mhp_t)BIT(0))
 
 /*
  * Extended parameters for memory hotplug:
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 710e469fb3a1..ae497e3ff77c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1153,7 +1153,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 	 * In case we're allowed to merge the resource, flag it and trigger
 	 * merging now that adding succeeded.
 	 */
-	if (mhp_flags & MEMHP_MERGE_RESOURCE)
+	if (mhp_flags & MHP_MERGE_RESOURCE)
 		merge_system_ram_resource(res);
 
 	/* online pages if requested */
-- 
2.29.2