From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<linmiaohe@huawei.com>
Subject: [PATCH] mm: swap: Use memset to fill the swap_map with SWAP_HAS_CACHE
Date: Mon, 21 Sep 2020 08:22:24 -0400 [thread overview]
Message-ID: <20200921122224.7139-1-linmiaohe@huawei.com> (raw)
We could use helper memset to fill the swap_map with SWAP_HAS_CACHE instead
of a direct loop here to simplify the code. Also we can remove the local
variable i and map this way.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/swapfile.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 8feaab31a3a9..b0b629b24e3a 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -975,8 +975,7 @@ static int swap_alloc_cluster(struct swap_info_struct *si, swp_entry_t *slot)
{
unsigned long idx;
struct swap_cluster_info *ci;
- unsigned long offset, i;
- unsigned char *map;
+ unsigned long offset;
/*
* Should not even be attempting cluster allocations when huge
@@ -996,9 +995,7 @@ static int swap_alloc_cluster(struct swap_info_struct *si, swp_entry_t *slot)
alloc_cluster(si, idx);
cluster_set_count_flag(ci, SWAPFILE_CLUSTER, CLUSTER_FLAG_HUGE);
- map = si->swap_map + offset;
- for (i = 0; i < SWAPFILE_CLUSTER; i++)
- map[i] = SWAP_HAS_CACHE;
+ memset(si->swap_map + offset, SWAP_HAS_CACHE, SWAPFILE_CLUSTER);
unlock_cluster(ci);
swap_range_alloc(si, offset, SWAPFILE_CLUSTER);
*slot = swp_entry(si->type, offset);
--
2.19.1
next reply other threads:[~2020-09-21 12:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-21 12:22 Miaohe Lin [this message]
2020-10-26 0:14 ` [PATCH] mm: swap: Use memset to fill the swap_map with SWAP_HAS_CACHE Andrew Morton
2020-10-07 2:49 linmiaohe
2020-10-26 3:03 linmiaohe
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