mm-memory-failure-update-ttu-flag-inside-unmap_poisoned_folio-v3

mm-memory-failure-update-ttu-flag-inside-unmap_poisoned_folio-v3

unmap_poisoned_folio(): remove shadowed local `mapping', per Miaohe

Link: https://lkml.kernel.org/r/20250219060653.3849083-1-mawupeng1@huawei.com
Fixes: 6da6b1d4a7df ("mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON")
Suggested-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>