diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-04-28 23:16:07 -0700 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-04-28 23:16:07 -0700 |
| commit | 3eefb826c5a627084eccec788f0236a070988dae (patch) | |
| tree | 4e2e1db0542545a6acc77fd171daecc20943b51e /mm/migrate.c | |
| parent | cb1c37b1c65d9e5450af2ea6ec8916c5cd23a2e7 (diff) | |
mm/migration: use helper macro min in do_pages_stat
We could use helper macro min to help set the chunk_nr to simplify the
code.
Link: https://lkml.kernel.org/r/20220318111709.60311-7-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index e73e1bfa874b..02448b618c6b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1842,16 +1842,12 @@ static int do_pages_stat(struct mm_struct *mm, unsigned long nr_pages, const void __user * __user *pages, int __user *status) { -#define DO_PAGES_STAT_CHUNK_NR 16 +#define DO_PAGES_STAT_CHUNK_NR 16UL const void __user *chunk_pages[DO_PAGES_STAT_CHUNK_NR]; int chunk_status[DO_PAGES_STAT_CHUNK_NR]; while (nr_pages) { - unsigned long chunk_nr; - - chunk_nr = nr_pages; - if (chunk_nr > DO_PAGES_STAT_CHUNK_NR) - chunk_nr = DO_PAGES_STAT_CHUNK_NR; + unsigned long chunk_nr = min(nr_pages, DO_PAGES_STAT_CHUNK_NR); if (in_compat_syscall()) { if (get_compat_pages_array(chunk_pages, pages, |