The patch titled
Subject: mm/migration: use helper macro min in do_pages_stat
has been added to the -mm tree. Its filename is
mm-migration-use-helper-macro-min-in-do_pages_stat.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-migration-use-helper-macro-min-in-do_pages_stat.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-migration-use-helper-macro-min-in-do_pages_stat.patch
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
--- a/mm/migrate.c~mm-migration-use-helper-macro-min-in-do_pages_stat
+++ a/mm/migrate.c
@@ -1844,16 +1844,12 @@ static int do_pages_stat(struct mm_struc
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,
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-shmem-make-shmem_init-return-void.patch
mm-memcg-remove-unneeded-nr_scanned.patch
mm-mremap-use-helper-mlock_future_check.patch
mm-mlock-fix-two-bugs-in-user_shm_lock.patch
mm-compaction-use-helper-isolation_suitable.patch
mm-migration-remove-unneeded-local-variable-mapping_locked.patch
mm-migration-remove-unneeded-out-label.patch
mm-migration-remove-unneeded-local-variable-page_lru.patch
mm-migration-fix-the-confusing-pagetranshuge-check.patch
mm-migration-use-helper-function-vma_lookup-in-add_page_for_migration.patch
mm-migration-use-helper-macro-min-in-do_pages_stat.patch
mm-migration-avoid-unneeded-nodemask_t-initialization.patch
mm-migration-remove-some-duplicated-codes-in-migrate_pages.patch
mm-migration-fix-potential-page-refcounts-leak-in-migrate_pages.patch
mm-migration-fix-potential-invalid-node-access-for-reclaim-based-migration.patch
mm-migration-fix-possible-do_pages_stat_array-racing-with-memory-offline.patch
