From: Hui Su <sh_def@xxxxxxx> Subject: mm/page_counter: use page_counter_read in page_counter_set_max Use page_counter_read() in page_counter_set_max(). Link: https://lkml.kernel.org/r/20201113141048.GA178922@rlk Signed-off-by: Hui Su <sh_def@xxxxxxx> Reviewed-by: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_counter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/page_counter.c~mm-page_counter-use-page_counter_read-in-page_counter_set_max +++ a/mm/page_counter.c @@ -183,14 +183,14 @@ int page_counter_set_max(struct page_cou * the limit, so if it sees the old limit, we see the * modified counter and retry. */ - usage = atomic_long_read(&counter->usage); + usage = page_counter_read(counter); if (usage > nr_pages) return -EBUSY; old = xchg(&counter->max, nr_pages); - if (atomic_long_read(&counter->usage) <= usage) + if (page_counter_read(counter) <= usage) return 0; counter->max = old; _
