linux-kernel - [PATCH] mm: remove redundant assignment of entry

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Date:   Mon,  8 Jul 2019 16:27:40 +0800
From:   Wei Yang <richardw.yang@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     akpm@...ux-foundation.org, willy@...radead.org, will@...nel.org,
        peterz@...radead.org, Wei Yang <richardw.yang@...ux.intel.com>
Subject: [PATCH] mm: remove redundant assignment of entry

Since ptent will not be changed after previous assignment of entry, it
is not necessary to do the assignment again.

Signed-off-by: Wei Yang <richardw.yang@...ux.intel.com>
---
 mm/memory.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index ddf20bd0c317..d108bb979a08 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1127,7 +1127,6 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
 		if (unlikely(details))
 			continue;
 
-		entry = pte_to_swp_entry(ptent);
 		if (!non_swap_entry(entry))
 			rss[MM_SWAPENTS]--;
 		else if (is_migration_entry(entry)) {
-- 
2.17.1