linux-kernel - [PATCH 5/8] cachefiles: Clean up in cachefiles_commit

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Message-ID: <20240821024301.1058918-6-wozizhi@huawei.com>
Date: Wed, 21 Aug 2024 10:42:58 +0800
From: Zizhi Wo <wozizhi@...wei.com>
To: <netfs@...ts.linux.dev>, <dhowells@...hat.com>, <jlayton@...nel.org>
CC: <hsiangkao@...ux.alibaba.com>, <jefflexu@...ux.alibaba.com>,
	<zhujia.zj@...edance.com>, <linux-erofs@...ts.ozlabs.org>,
	<linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<wozizhi@...wei.com>, <libaokun1@...wei.com>, <yangerkun@...wei.com>,
	<houtao1@...wei.com>, <yukuai3@...wei.com>
Subject: [PATCH 5/8] cachefiles: Clean up in cachefiles_commit_tmpfile()

Currently, cachefiles_commit_tmpfile() will only be called if object->flags
is set to CACHEFILES_OBJECT_USING_TMPFILE. Only cachefiles_create_file()
and cachefiles_invalidate_cookie() set this flag. Both of these functions
replace object->file with the new tmpfile, and both are called by
fscache_cookie_state_machine(), so there are no concurrency issues.

So the equation "d_backing_inode(dentry) == file_inode(object->file)" in
cachefiles_commit_tmpfile() will never hold true according to the above
conditions. This patch removes this part of the redundant code and does not
involve any other logical changes.

Signed-off-by: Zizhi Wo <wozizhi@...wei.com>
---
 fs/cachefiles/namei.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 70b0b3477085..ce9d558ae4fa 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -700,11 +700,6 @@ bool cachefiles_commit_tmpfile(struct cachefiles_cache *cache,
 	}

 	if (!d_is_negative(dentry)) {
-		if (d_backing_inode(dentry) == file_inode(object->file)) {
-			success = true;
-			goto out_dput;
-		}
-
 		ret = cachefiles_unlink(volume->cache, object, fan, dentry,
 					FSCACHE_OBJECT_IS_STALE);
 		if (ret < 0)
-- 
2.39.2