diff options
| author |   Wei Yang <richard.weiyang@gmail.com> | 2020-06-01 21:49:07 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 10:59:09 -0700 |
| commit | 7b9e2de130954af174e6f7aff278cf1ec5f39675 (patch) | |
| tree | 2ebb38107c36c0c77738259f6a46fd6a3dd6e517 /mm/swapfile.c | |
| parent | mm/swapfile.c: tmp is always smaller than max (diff) | |
| download | wireguard-linux-7b9e2de130954af174e6f7aff278cf1ec5f39675.tar.xz wireguard-linux-7b9e2de130954af174e6f7aff278cf1ec5f39675.zip | |
mm/swapfile.c: omit a duplicate code by compare tmp and max first
There are two duplicate code to handle the case when there is no available
swap entry. To avoid this, we can compare tmp and max first and let the
second guard do its job.
No functional change is expected.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Link: http://lkml.kernel.org/r/20200421213824.8099-3-richard.weiyang@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index c74c9e1dc50d..1743386d2401 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -629,17 +629,15 @@ new_cluster: tmp = cluster->next; max = min_t(unsigned long, si->max, (cluster_next(&cluster->index) + 1) * SWAPFILE_CLUSTER); - if (tmp >= max) { - cluster_set_null(&cluster->index); - goto new_cluster; - } - ci = lock_cluster(si, tmp); - while (tmp < max) { - if (!si->swap_map[tmp]) - break; - tmp++; + if (tmp < max) { + ci = lock_cluster(si, tmp); + while (tmp < max) { + if (!si->swap_map[tmp]) + break; + tmp++; + } + unlock_cluster(ci); } - unlock_cluster(ci); if (tmp >= max) { cluster_set_null(&cluster->index); goto new_cluster; |