From: Qian Cai <cai@lca.pw>
To: akpm@linux-foundation.org
Cc: willy@infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Qian Cai <cai@lca.pw>
Subject: [PATCH v2] mm/hugepages: fix "orig_pud" set but not used
Date: Fri, 1 Mar 2019 17:19:56 -0500 [thread overview]
Message-ID: <20190301221956.97493-1-cai@lca.pw> (raw)
The commit a00cc7d9dd93 ("mm, x86: add support for PUD-sized transparent
hugepages") introduced pudp_huge_get_and_clear_full() but no one uses
its return code. In order to not diverge from
pmdp_huge_get_and_clear_full(), just change zap_huge_pud() to not assign
the return value from pudp_huge_get_and_clear_full().
mm/huge_memory.c: In function 'zap_huge_pud':
mm/huge_memory.c:1982:8: warning: variable 'orig_pud' set but not used
[-Wunused-but-set-variable]
pud_t orig_pud;
^~~~~~~~
Signed-off-by: Qian Cai <cai@lca.pw>
---
v2: keep returning a code from pudp_huge_get_and_clear_full() for possible
future uses.
mm/huge_memory.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index faf357eaf0ce..9f57a1173e6a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1979,7 +1979,6 @@ spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma)
int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
pud_t *pud, unsigned long addr)
{
- pud_t orig_pud;
spinlock_t *ptl;
ptl = __pud_trans_huge_lock(pud, vma);
@@ -1991,8 +1990,7 @@ int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
* pgtable_trans_huge_withdraw after finishing pudp related
* operations.
*/
- orig_pud = pudp_huge_get_and_clear_full(tlb->mm, addr, pud,
- tlb->fullmm);
+ pudp_huge_get_and_clear_full(tlb->mm, addr, pud, tlb->fullmm);
tlb_remove_pud_tlb_entry(tlb, pud, addr);
if (vma_is_dax(vma)) {
spin_unlock(ptl);
--
2.17.2 (Apple Git-113)
next reply other threads:[~2019-03-01 22:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-01 22:19 Qian Cai [this message]
2019-03-04 12:02 ` [PATCH v2] mm/hugepages: fix "orig_pud" set but not used Souptick Joarder
2019-03-04 14:09 ` Qian Cai
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