linux-kernel - [PATCH 4.19 023/421] ext4: remove check for zero nr_to_scan in ext4_es

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Date:   Mon, 19 Jul 2021 16:47:14 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhang Yi <yi.zhang@...wei.com>,
        Jan Kara <jack@...e.cz>, Theodore Tso <tytso@....edu>
Subject: [PATCH 4.19 023/421] ext4: remove check for zero nr_to_scan in ext4_es_scan()

From: Zhang Yi <yi.zhang@...wei.com>

commit e5e7010e5444d923e4091cafff61d05f2d19cada upstream.

After converting fs shrinkers to new scan/count API, we are no longer
pass zero nr_to_scan parameter to detect the number of objects to free,
just remove this check.

Fixes: 1ab6c4997e04 ("fs: convert fs shrinkers to new scan/count API")
Cc: stable@...r.kernel.org # 3.12+
Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
Reviewed-by: Jan Kara <jack@...e.cz>
Link: https://lore.kernel.org/r/20210522103045.690103-2-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/extents_status.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -1080,9 +1080,6 @@ static unsigned long ext4_es_scan(struct
 	ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt);
 	trace_ext4_es_shrink_scan_enter(sbi->s_sb, nr_to_scan, ret);
 
-	if (!nr_to_scan)
-		return ret;
-
 	nr_shrunk = __es_shrink(sbi, nr_to_scan, NULL);
 
 	ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt);