From 661c7566438119cbf490b0b359ee69a0f9dbaf9a Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Mon, 14 Dec 2020 19:06:07 -0800 Subject: mm/swapfile.c: use memset to fill the swap_map with SWAP_HAS_CACHE 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. Link: https://lkml.kernel.org/r/20200921122224.7139-1-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/swapfile.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index 83df467e1135..1c0a829f7311 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); -- cgit v1.2.3