mm/memory-failure.c: remove unnecessary (void*) conversions

No need cast (void*) to (struct hwp_walk*).

Link: https://lkml.kernel.org/r/20220322142826.25939-1-liqiong@nfschina.comSigned-off-by: liqiong <liqiong@nfschina.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/memory-failure.c

@@ -622,7 +622,7 @@ static int check_hwpoisoned_pmd_entry(pmd_t *pmdp, unsigned long addr,
 static int hwpoison_pte_range(pmd_t *pmdp, unsigned long addr,
 			      unsigned long end, struct mm_walk *walk)
 {
-	struct hwp_walk *hwp = (struct hwp_walk *)walk->private;
+	struct hwp_walk *hwp = walk->private;
 	int ret = 0;
 	pte_t *ptep, *mapped_pte;
 	spinlock_t *ptl;
@@ -656,7 +656,7 @@ static int hwpoison_hugetlb_range(pte_t *ptep, unsigned long hmask,
 			    unsigned long addr, unsigned long end,
 			    struct mm_walk *walk)
 {
-	struct hwp_walk *hwp = (struct hwp_walk *)walk->private;
+	struct hwp_walk *hwp = walk->private;
 	pte_t pte = huge_ptep_get(ptep);
 	struct hstate *h = hstate_vma(walk->vma);