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mm/page_counter: use page_counter_read in page_counter_set_max

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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@163.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hui Su
2020-12-14 19:06:58 -08:00
committed by Linus Torvalds
parent 9d9d341df4
commit 1306478130
1 changed files with 2 additions and 2 deletions
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4
mm/page_counter.c
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@@ -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 * the limit, so if it sees the old limit, we see the
* modified counter and retry. * modified counter and retry.
*/ */
usage = atomic_long_read(&counter->usage); usage = page_counter_read(counter);
if (usage > nr_pages) if (usage > nr_pages)
return -EBUSY; return -EBUSY;
old = xchg(&counter->max, nr_pages); old = xchg(&counter->max, nr_pages);
if (atomic_long_read(&counter->usage) <= usage) if (page_counter_read(counter) <= usage)
return 0; return 0;
counter->max = old; counter->max = old;