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Subject[PATCH v10 1/3] mm/memory_hotplug: replace an open-coded kmemdup() in add_memory_resource()
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 --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 */
}
--
2.41.0

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