linux-kernel - [v2][PATCH 3/5] Move common mknod

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Date:	Tue, 3 Feb 2009 20:37:32 -0800
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>, hpa@...or.com, hch@....de
Cc:	serue@...ibm.com, sukadev@...ibm.com,
	Containers <containers@...ts.osdl.org>,
	linux-kernel@...r.kernel.org
Subject: [v2][PATCH 3/5] Move common mknod_ptmx() calls into caller


From: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Date: Wed, 28 Jan 2009 18:54:25 -0800
Subject: [v2][PATCH 3/5] Move common mknod_ptmx() calls into caller

We create 'ptmx' node in both single-instance and multiple-instance
mounts. So devpts_get_sb() can call mknod_ptmx() once rather than
have both modes calling mknod_ptmx() separately.

Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
---
 fs/devpts/inode.c |   36 +++++++++++++++++-------------------
 1 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 9b24de8..f7e887c 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -343,17 +343,7 @@ static int new_pts_mount(struct file_system_type *fs_type, int flags,
 	fsi = DEVPTS_SB(mnt->mnt_sb);
 	memcpy(&fsi->mount_opts, opts, sizeof(opts));
 
-	err = mknod_ptmx(mnt->mnt_sb);
-	if (err)
-		goto fail;
-
 	return 0;
-
-fail:
-	dput(mnt->mnt_sb->s_root);
-	up_write(&mnt->mnt_sb->s_umount);
-	deactivate_super(mnt->mnt_sb);
-	return err;
 }
 
 /*
@@ -421,13 +411,6 @@ static int init_pts_mount(struct file_system_type *fs_type, int flags,
 	if (err)
 		return err;
 
-	err = mknod_ptmx(mnt->mnt_sb);
-	if (err) {
-		dput(mnt->mnt_sb->s_root);
-		up_write(&mnt->mnt_sb->s_umount);
-		deactivate_super(mnt->mnt_sb);
-	}
-
 	return err;
 }
 
@@ -445,9 +428,24 @@ static int devpts_get_sb(struct file_system_type *fs_type,
 	}
 
 	if (opts.newinstance)
-		return new_pts_mount(fs_type, flags, data, &opts, mnt);
+		error = new_pts_mount(fs_type, flags, data, &opts, mnt);
 	else
-		return init_pts_mount(fs_type, flags, data, &opts, mnt);
+		error = init_pts_mount(fs_type, flags, data, &opts, mnt);
+
+	if (error)
+		return error;
+
+	error = mknod_ptmx(mnt->mnt_sb);
+	if (error)
+		goto out_dput;
+
+	return 0;
+
+out_dput:
+	dput(mnt->mnt_sb->s_root);
+	up_write(&mnt->mnt_sb->s_umount);
+	deactivate_super(mnt->mnt_sb);
+	return error;
 }
 
 #else
-- 
1.5.2.5

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