From: Chengguang Xu <cgxu519@zoho.com.cn>
Date: Mon, 23 Sep 2019 13:52:23 +0000 (+0800)
Subject: quota: code cleanup for hash bits calculation
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=24fc755f56b15bf3215c0d0b8b62d7204f369bab;p=openwrt%2Fstaging%2Fblogic.git

quota: code cleanup for hash bits calculation

Code cleanup for hash bits calculation by
calling ilog2().

Link: https://lore.kernel.org/r/20190923135223.27674-1-cgxu519@zoho.com.cn
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 00a3c6df2ea3..26812a67ed77 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2981,11 +2981,7 @@ static int __init dquot_init(void)
 
 	/* Find power-of-two hlist_heads which can fit into allocation */
 	nr_hash = (1UL << order) * PAGE_SIZE / sizeof(struct hlist_head);
-	dq_hash_bits = 0;
-	do {
-		dq_hash_bits++;
-	} while (nr_hash >> dq_hash_bits);
-	dq_hash_bits--;
+	dq_hash_bits = ilog2(nr_hash);
 
 	nr_hash = 1UL << dq_hash_bits;
 	dq_hash_mask = nr_hash - 1;