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From:   Wei Yang <richardw.yang@linux.intel.com>
To:     akpm@linux-foundation.org
Cc:     mhocko@suse.com, yang.shi@linux.alibaba.com, rientjes@google.com,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Wei Yang <richardw.yang@linux.intel.com>
Subject: [Patch v3 1/4] mm/migrate.c: not necessary to check start and i
Date:   Sun, 26 Jan 2020 18:26:20 +0800
Message-Id: <20200126102623.9616-2-richardw.yang@linux.intel.com>
In-Reply-To: <20200126102623.9616-1-richardw.yang@linux.intel.com>
References: <20200126102623.9616-1-richardw.yang@linux.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Till here, i must no less than start. And if i equals to start,
store_status() would always return 0.

Remove some unnecessary check to make it easy to read and prepare for
further cleanup.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
---
 mm/migrate.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 6a6c8f247bce..ae3db45c6a42 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1674,11 +1674,9 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
 				err += nr_pages - i - 1;
 			goto out;
 		}
-		if (i > start) {
-			err = store_status(status, start, current_node, i - start);
-			if (err)
-				goto out;
-		}
+		err = store_status(status, start, current_node, i - start);
+		if (err)
+			goto out;
 		current_node = NUMA_NO_NODE;
 	}
 out_flush:
-- 
2.17.1