Commit 13064781 authored by Hui Su's avatar Hui Su Committed by Linus Torvalds
Browse files

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: default avatarHui Su <sh_def@163.com>
Reviewed-by: default avatarPankaj Gupta <pankaj.gupta@cloud.ionos.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9d9d341d

mm/page_counter.c

+2 −2
Original line number Diff line number Diff line
@@ -183,14 +183,14 @@ int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages) 
		 * 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;