linux-kernel - [RFC PATCH 5/7] exfat: improve exfat_find_last

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Message-ID: <20251118082208.1034186-6-chizhiling@163.com>
Date: Tue, 18 Nov 2025 16:22:06 +0800
From: Chi Zhiling <chizhiling@....com>
To: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	Matthew Wilcox <willy@...radead.org>,
	Namjae Jeon <linkinjeon@...nel.org>,
	Sungjong Seo <sj1557.seo@...sung.com>,
	Yuezhang Mo <yuezhang.mo@...y.com>,
	Chi Zhiling <chizhiling@...inos.cn>
Subject: [RFC PATCH 5/7] exfat: improve exfat_find_last_cluster

From: Chi Zhiling <chizhiling@...inos.cn>

Since exfat_ent_get support cache buffer head, let's apply it to
exfat_find_last_cluster.

Signed-off-by: Chi Zhiling <chizhiling@...inos.cn>
---
 fs/exfat/fatent.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index 08f9a817af28..d980d17176c2 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -298,6 +298,7 @@ int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain)
 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
 		unsigned int *ret_clu)
 {
+	struct buffer_head *bh = NULL;
 	unsigned int clu, next;
 	unsigned int count = 0;
 
@@ -310,10 +311,11 @@ int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
 	do {
 		count++;
 		clu = next;
-		if (exfat_ent_get(sb, clu, &next, NULL))
+		if (exfat_ent_get(sb, clu, &next, &bh))
 			return -EIO;
 	} while (next != EXFAT_EOF_CLUSTER && count <= p_chain->size);
 
+	brelse(bh);
 	if (p_chain->size != count) {
 		exfat_fs_error(sb,
 			"bogus directory size (clus : ondisk(%d) != counted(%d))",
-- 
2.43.0