diff mbox series

[v10,1/3] mm/memory_hotplug: replace an open-coded kmemdup() in add_memory_resource()

Message ID 20231107-vv-kmem_memmap-v10-1-1253ec050ed0@intel.com
State New
Headers
Series mm: use memmap_on_memory semantics for dax/kmem |

Commit Message

Verma, Vishal L Nov. 7, 2023, 7:22 a.m. UTC 
  A review of the memmap_on_memory modifications to add_memory_resource()
revealed an instance of an open-coded kmemdup(). Replace it with
kmemdup().

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Reported-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 mm/memory_hotplug.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index ab41a511e20a..3ed48059a780 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1439,13 +1439,13 @@  int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 	if (mhp_flags & MHP_MEMMAP_ON_MEMORY) {
 		if (mhp_supports_memmap_on_memory(size)) {
 			mhp_altmap.free = memory_block_memmap_on_memory_pages();
-			params.altmap = kmalloc(sizeof(struct vmem_altmap), GFP_KERNEL);
+			params.altmap = kmemdup(&mhp_altmap,
+						sizeof(struct vmem_altmap),
+						GFP_KERNEL);
 			if (!params.altmap) {
 				ret = -ENOMEM;
 				goto error;
 			}
-
-			memcpy(params.altmap, &mhp_altmap, sizeof(mhp_altmap));
 		}
 		/* fallback to not using altmap  */
 	}