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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-28 23:16:07 -0700
committerakpm <akpm@linux-foundation.org>2022-04-28 23:16:07 -0700
commit3eefb826c5a627084eccec788f0236a070988dae (patch)
tree4e2e1db0542545a6acc77fd171daecc20943b51e /mm/migrate.c
parentcb1c37b1c65d9e5450af2ea6ec8916c5cd23a2e7 (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.c8
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,