linux-kernel - [PATCH 04/10] VFS: move dput() and mnt_drop_write() into done_path

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Date:   Fri, 26 Aug 2022 12:10:43 +1000
From:   NeilBrown <neilb@...e.de>
To:     Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Daire Byrne <daire@...g.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Chuck Lever <chuck.lever@...cle.com>
Cc:     Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 04/10] VFS: move dput() and mnt_drop_write() into
 done_path_update()

All calls to done_path_update() are followed by the same two calls, so
merge them in.

Signed-off-by: NeilBrown <neilb@...e.de>
---
 fs/namei.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 73c3319a1703..8df09c19f2b0 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1734,6 +1734,8 @@ static void done_path_update(struct path *path, struct dentry *dentry,
 		inode_unlock_shared(dir);
 	else
 		inode_unlock(dir);
+	dput(dentry);
+	mnt_drop_write(path->mnt);
 }
 
 static struct dentry *lookup_fast(struct nameidata *nd)
@@ -3988,8 +3990,6 @@ EXPORT_SYMBOL(kern_path_create);
 void done_path_create_wq(struct path *path, struct dentry *dentry, bool with_wq)
 {
 	done_path_update(path, dentry, with_wq);
-	dput(dentry);
-	mnt_drop_write(path->mnt);
 	path_put(path);
 }
 EXPORT_SYMBOL(done_path_create_wq);
@@ -4310,8 +4310,6 @@ int do_rmdir(int dfd, struct filename *name)
 	error = vfs_rmdir(mnt_userns, path.dentry->d_inode, dentry);
 exit3:
 	done_path_update(&path, dentry, true);
-	dput(dentry);
-	mnt_drop_write(path.mnt);
 exit2:
 	path_put(&path);
 	if (retry_estale(error, lookup_flags)) {
@@ -4446,8 +4444,6 @@ int do_unlinkat(int dfd, struct filename *name)
 				   &delegated_inode);
 exit3:
 		done_path_update(&path, dentry, true);
-		dput(dentry);
-		mnt_drop_write(path.mnt);
 	}
 	if (inode)
 		iput(inode);	/* truncate the inode here */