make ->atomic_open() return int

Change of calling conventions:
old		new
NULL		1
file		0
ERR_PTR(-ve)	-ve

Caller *knows* that struct file *; no need to return it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

13 files changed, 97 insertions, 105 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index af4e45bd6cf..46a24a6ed09 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -62,7 +62,7 @@ ata *);
 	int (*removexattr) (struct dentry *, const char *);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
 	void (*update_time)(struct inode *, struct timespec *, int);
-	struct file * (*atomic_open)(struct inode *, struct dentry *,
+	int (*atomic_open)(struct inode *, struct dentry *,
 				struct opendata *, unsigned open_flag,
 				umode_t create_mode, int *opened);
 
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index d7121051afc..d0d690bbc4c 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -364,7 +364,7 @@ struct inode_operations {
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*removexattr) (struct dentry *, const char *);
 	void (*update_time)(struct inode *, struct timespec *, int);
-	struct file * (*atomic_open)(struct inode *, struct dentry *,
+	int (*atomic_open)(struct inode *, struct dentry *,
 				struct opendata *, unsigned open_flag,
 				umode_t create_mode, int *opened);
 };
@@ -482,8 +482,8 @@ otherwise noted.
   atomic_open: called on the last component of an open.  Using this optional
   	method the filesystem can look up, possibly create and open the file in
   	one atomic operation.  If it cannot perform this (e.g. the file type
-  	turned out to be wrong) it may signal this by returning NULL instead of
-  	an open struct file pointer.  This method is only called if the last
+  	turned out to be wrong) it may signal this by returning 1 instead of
+  	usual 0 or -ve .  This method is only called if the last
   	component is negative or needs lookup.  Cached positive dentries are
   	still handled by f_op->open().
 
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index de626b3b342..62ce8daefa9 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -856,7 +856,7 @@ error:
 	return ERR_PTR(result);
 }
 
-static struct file *
+static int
 v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
 		     struct opendata *od, unsigned flags, umode_t mode,
 		     int *opened)
@@ -872,7 +872,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
 	if (d_unhashed(dentry)) {
 		res = v9fs_vfs_lookup(dir, dentry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		if (res)
 			dentry = res;
@@ -881,7 +881,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
 	/* Only creates */
 	if (!(flags & O_CREAT) || dentry->d_inode) {
 		finish_no_open(od, res);
-		return NULL;
+		return 1;
 	}
 
 	err = 0;
@@ -933,13 +933,11 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
 	*opened |= FILE_CREATED;
 out:
 	dput(res);
-	return filp;
+	return err;
 
 error:
 	if (fid)
 		p9_client_clunk(fid);
-
-	filp = ERR_PTR(err);
 	goto out;
 }
 
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 3db55471bc9..69f05109f75 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -240,7 +240,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
 	return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
 }
 
-static struct file *
+static int
 v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 			  struct opendata *od, unsigned flags, umode_t omode,
 			  int *opened)
@@ -262,7 +262,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 	if (d_unhashed(dentry)) {
 		res = v9fs_vfs_lookup(dir, dentry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		if (res)
 			dentry = res;
@@ -271,7 +271,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 	/* Only creates */
 	if (!(flags & O_CREAT) || dentry->d_inode) {
 		finish_no_open(od, res);
-		return NULL;
+		return 1;
 	}
 
 	v9ses = v9fs_inode2v9ses(dir);
@@ -284,7 +284,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 	if (IS_ERR(dfid)) {
 		err = PTR_ERR(dfid);
 		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
-		goto err_return;
+		goto out;
 	}
 
 	/* clone a fid to use for creation */
@@ -292,7 +292,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 	if (IS_ERR(ofid)) {
 		err = PTR_ERR(ofid);
 		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
-		goto err_return;
+		goto out;
 	}
 
 	gid = v9fs_get_fsgid_for_create(dir);
@@ -370,7 +370,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
 	*opened |= FILE_CREATED;
 out:
 	dput(res);
-	return filp;
+	return err;
 
 error:
 	if (fid)
@@ -379,8 +379,6 @@ err_clunk_old_fid:
 	if (ofid)
 		p9_client_clunk(ofid);
 	v9fs_set_create_acl(NULL, &dacl, &pacl);
-err_return:
-	filp = ERR_PTR(err);
 	goto out;
 }
 
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 81e5e908df9..d8bfabeeaa2 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -634,21 +634,20 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 	return dentry;
 }
 
-struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
-			      struct opendata *od, unsigned flags, umode_t mode,
-			      int *opened)
+int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
+		     struct opendata *od, unsigned flags, umode_t mode,
+		     int *opened)
 {
 	int err;
 	struct dentry *res = NULL;
-	struct file *filp;
 
 	if (!(flags & O_CREAT)) {
 		if (dentry->d_name.len > NAME_MAX)
-			return ERR_PTR(-ENAMETOOLONG);
+			return -ENAMETOOLONG;
 
 		err = ceph_init_dentry(dentry);
 		if (err < 0)
-			return ERR_PTR(err);
+			return err;
 
 		return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
 	}
@@ -656,7 +655,7 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	if (d_unhashed(dentry)) {
 		res = ceph_lookup(dir, dentry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		if (res)
 			dentry = res;
@@ -665,14 +664,14 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	/* We don't deal with positive dentries here */
 	if (dentry->d_inode) {
 		finish_no_open(od, res);
-		return NULL;
+		return 1;
 	}
 
 	*opened |= FILE_CREATED;
-	filp = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
+	err = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
 	dput(res);
 
-	return filp;
+	return err;
 }
 
 /*
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4c304a90d04..b8cc3ee5401 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -213,9 +213,9 @@ out:
  * may_open() fails, the struct *file gets cleaned up (i.e.
  * ceph_release gets called).  So fear not!
  */
-struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-			      struct opendata *od, unsigned flags, umode_t mode,
-			      int *opened)
+int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+		     struct opendata *od, unsigned flags, umode_t mode,
+		     int *opened)
 {
 	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
 	struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -230,7 +230,7 @@ struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
 	/* do the open */
 	req = prepare_open_request(dir->i_sb, flags, mode);
 	if (IS_ERR(req))
-		return ERR_CAST(req);
+		return PTR_ERR(req);
 	req->r_dentry = dget(dentry);
 	req->r_num_caps = 2;
 	if (flags & O_CREAT) {
@@ -257,10 +257,10 @@ out:
 	dout("ceph_lookup_open result=%p\n", ret);
 
 	if (IS_ERR(ret))
-		return ERR_CAST(ret);
+		return PTR_ERR(ret);
 
 	dput(ret);
-	return err ? ERR_PTR(err) : file;
+	return err;
 }
 
 int ceph_release(struct inode *inode, struct file *file)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f9a325108b4..f7e8e82ec47 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -806,9 +806,9 @@ extern int ceph_copy_from_page_vector(struct page **pages,
 				    loff_t off, size_t len);
 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
 extern int ceph_open(struct inode *inode, struct file *file);
-extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-				     struct opendata *od, unsigned flags,
-				     umode_t mode, int *opened);
+extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+			     struct opendata *od, unsigned flags,
+			     umode_t mode, int *opened);
 extern int ceph_release(struct inode *inode, struct file *filp);
 
 /* dir.c */
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 92a7c3d8a03..58d9aca46a4 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -46,9 +46,9 @@ extern const struct inode_operations cifs_dir_inode_ops;
 extern struct inode *cifs_root_iget(struct super_block *);
 extern int cifs_create(struct inode *, struct dentry *, umode_t,
 		       struct nameidata *);
-extern struct file *cifs_atomic_open(struct inode *, struct dentry *,
-				     struct opendata *, unsigned, umode_t,
-				     int *);
+extern int cifs_atomic_open(struct inode *, struct dentry *,
+			    struct opendata *, unsigned, umode_t,
+			    int *);
 extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
 				  struct nameidata *);
 extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 6cdf23fd70e..8ca70b102b9 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -376,7 +376,7 @@ out:
 	return rc;
 }
 
-struct file *
+int
 cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 		 struct opendata *od, unsigned oflags, umode_t mode,
 		 int *opened)
@@ -403,15 +403,15 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	if (!(oflags & O_CREAT)) {
 		struct dentry *res = cifs_lookup(inode, direntry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		finish_no_open(od, res);
-		return NULL;
+		return 1;
 	}
 
 	rc = check_name(direntry);
 	if (rc)
-		return ERR_PTR(rc);
+		return rc;
 
 	xid = GetXid();
 
@@ -428,13 +428,12 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
 			    &oplock, &fileHandle, opened);
 
-	if (rc) {
-		filp = ERR_PTR(rc);
+	if (rc)
 		goto out;
-	}
 
 	filp = finish_open(od, direntry, generic_file_open, opened);
 	if (IS_ERR(filp)) {
+		rc = PTR_ERR(filp);
 		CIFSSMBClose(xid, tcon, fileHandle);
 		goto out;
 	}
@@ -443,14 +442,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	if (pfile_info == NULL) {
 		CIFSSMBClose(xid, tcon, fileHandle);
 		fput(filp);
-		filp = ERR_PTR(-ENOMEM);
+		rc = -ENOMEM;
 	}
 
 out:
 	cifs_put_tlink(tlink);
 free_xid:
 	FreeXid(xid);
-	return filp;
+	return rc;
 }
 
 int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 345f78ee5c9..8a9ca09e87d 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -369,9 +369,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
  * If the filesystem doesn't support this, then fall back to separate
  * 'mknod' + 'open' requests.
  */
-static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
-				     struct opendata *od, unsigned flags,
-				     umode_t mode, int *opened)
+static int fuse_create_open(struct inode *dir, struct dentry *entry,
+			    struct opendata *od, unsigned flags,
+			    umode_t mode, int *opened)
 {
 	int err;
 	struct inode *inode;
@@ -452,12 +452,14 @@ static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
 	fuse_invalidate_attr(dir);
 	file = finish_open(od, entry, generic_file_open, opened);
 	if (IS_ERR(file)) {
+		err = PTR_ERR(file);
 		fuse_sync_release(ff, flags);
 	} else {
 		file->private_data = fuse_file_get(ff);
 		fuse_finish_open(inode, file);
+		err = 0;
 	}
-	return file;
+	return err;
 
 out_free_ff:
 	fuse_file_free(ff);
@@ -466,23 +468,22 @@ out_put_request:
 out_put_forget_req:
 	kfree(forget);
 out_err:
-	return ERR_PTR(err);
+	return err;
 }
 
 static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
-static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
-				     struct opendata *od, unsigned flags,
-				     umode_t mode, int *opened)
+static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
+			    struct opendata *od, unsigned flags,
+			    umode_t mode, int *opened)
 {
 	int err;
 	struct fuse_conn *fc = get_fuse_conn(dir);
-	struct file *file;
 	struct dentry *res = NULL;
 
 	if (d_unhashed(entry)) {
 		res = fuse_lookup(dir, entry, NULL);
 		if (IS_ERR(res))
-			return ERR_CAST(res);
+			return PTR_ERR(res);
 
 		if (res)
 			entry = res;
@@ -497,24 +498,22 @@ static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
 	if (fc->no_create)
 		goto mknod;
 
-	file = fuse_create_open(dir, entry, od, flags, mode, opened);
-	if (PTR_ERR(file) == -ENOSYS) {
+	err = fuse_create_open(dir, entry, od, flags, mode, opened);
+	if (err == -ENOSYS) {
 		fc->no_create = 1;
 		goto mknod;
 	}
 out_dput:
 	dput(res);
-	return file;
+	return err;
 
 mknod:
 	err = fuse_mknod(dir, entry, mode, 0);
-	if (err) {
-		file = ERR_PTR(err);
+	if (err)
 		goto out_dput;
-	}
 no_open:
 	finish_no_open(od, res);
-	return NULL;
+	return 1;
 }
 
 /*
diff --git a/fs/namei.c b/fs/namei.c
index 18b9326d951..f0dae0057ec 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2204,7 +2204,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
 	umode_t mode;
 	int error;
 	int acc_mode;
-	struct file *filp;
+	struct file *filp = NULL;
 	int create_error = 0;
 	struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
 
@@ -2271,14 +2271,15 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
 
 	od->dentry = DENTRY_NOT_SET;
 	od->mnt = nd->path.mnt;
-	filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
+	error = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
 				      opened);
-	if (IS_ERR(filp)) {
+	if (error < 0) {
 		if (WARN_ON(od->dentry != DENTRY_NOT_SET))
 			dput(od->dentry);
 
-		if (create_error && PTR_ERR(filp) == -ENOENT)
-			filp = ERR_PTR(create_error);
+		if (create_error && error == -ENOENT)
+			error = create_error;
+		filp = ERR_PTR(error);
 		goto out;
 	}
 
@@ -2288,7 +2289,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
 		acc_mode = MAY_OPEN;
 	}
 
-	if (!filp) {
+	if (error) {	/* returned 1, that is */
 		if (WARN_ON(od->dentry == DENTRY_NOT_SET)) {
 			filp = ERR_PTR(-EIO);
 			goto out;
@@ -2304,6 +2305,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
 	 * We didn't have the inode before the open, so check open permission
 	 * here.
 	 */
+	filp = od->filp;
 	error = may_open(&filp->f_path, acc_mode, open_flag);
 	if (error) {
 		fput(filp);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 6deb2549ead..b56f4b36ed4 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -111,9 +111,9 @@ const struct inode_operations nfs3_dir_inode_operations = {
 
 #ifdef CONFIG_NFS_V4
 
-static struct file *nfs_atomic_open(struct inode *, struct dentry *,
-				    struct opendata *, unsigned, umode_t,
-				    int *);
+static int nfs_atomic_open(struct inode *, struct dentry *,
+			   struct opendata *, unsigned, umode_t,
+			   int *);
 const struct inode_operations nfs4_dir_inode_operations = {
 	.create		= nfs_create,
 	.lookup		= nfs_lookup,
@@ -1387,10 +1387,10 @@ static int do_open(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static struct file *nfs_finish_open(struct nfs_open_context *ctx,
-				    struct dentry *dentry,
-				    struct opendata *od, unsigned open_flags,
-				    int *opened)
+static int nfs_finish_open(struct nfs_open_context *ctx,
+			   struct dentry *dentry,
+			   struct opendata *od, unsigned open_flags,
+			   int *opened)
 {
 	struct file *filp;
 	int err;
@@ -1403,30 +1403,31 @@ static struct file *nfs_finish_open(struct nfs_open_context *ctx,
 	/* If the open_intent is for execute, we have an extra check to make */
 	if (ctx->mode & FMODE_EXEC) {
 		err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
-		if (err < 0) {
-			filp = ERR_PTR(err);
+		if (err < 0)
 			goto out;
-		}
 	}
 
 	filp = finish_open(od, dentry, do_open, opened);
-	if (!IS_ERR(filp))
-		nfs_file_set_open_context(filp, ctx);
+	if (IS_ERR(filp)) {
+		err = PTR_ERR(filp);
+		goto out;
+	}
+	nfs_file_set_open_context(filp, ctx);
+	err = 0;
 
 out:
 	put_nfs_open_context(ctx);
-	return filp;
+	return err;
 }
 
-static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
-				    struct opendata *od, unsigned open_flags,
-				    umode_t mode, int *opened)
+static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
+			    struct opendata *od, unsigned open_flags,
+			    umode_t mode, int *opened)
 {
 	struct nfs_open_context *ctx;
 	struct dentry *res;
 	struct iattr attr = { .ia_valid = ATTR_OPEN };
 	struct inode *inode;
-	struct file *filp;
 	int err;
 
 	/* Expect a negative dentry */
@@ -1437,21 +1438,19 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
 
 	/* NFS only supports OPEN on regular files */
 	if ((open_flags & O_DIRECTORY)) {
-		err = -ENOENT;
 		if (!d_unhashed(dentry)) {
 			/*
 			 * Hashed negative dentry with O_DIRECTORY: dentry was
 			 * revalidated and is fine, no need to perform lookup
 			 * again
 			 */
-			goto out_err;
+			return -ENOENT;
 		}
 		goto no_open;
 	}
 
-	err = -ENAMETOOLONG;
 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
-		goto out_err;
+		return -ENAMETOOLONG;
 
 	if (open_flags & O_CREAT) {
 		attr.ia_valid |= ATTR_MODE;
@@ -1465,7 +1464,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
 	ctx = create_nfs_open_context(dentry, open_flags);
 	err = PTR_ERR(ctx);
 	if (IS_ERR(ctx))
-		goto out_err;
+		goto out;
 
 	nfs_block_sillyrename(dentry->d_parent);
 	inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
@@ -1489,7 +1488,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
 		default:
 			break;
 		}
-		goto out_err;
+		goto out;
 	}
 	res = d_add_unique(dentry, inode);
 	if (res != NULL)
@@ -1498,22 +1497,20 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
 	nfs_unblock_sillyrename(dentry->d_parent);
 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 
-	filp = nfs_finish_open(ctx, dentry, od, open_flags, opened);
+	err = nfs_finish_open(ctx, dentry, od, open_flags, opened);
 
 	dput(res);
-	return filp;
-
-out_err:
-	return ERR_PTR(err);
+out:
+	return err;
 
 no_open:
 	res = nfs_lookup(dir, dentry, NULL);
 	err = PTR_ERR(res);
 	if (IS_ERR(res))
-		goto out_err;
+		goto out;
 
 	finish_no_open(od, res);
-	return NULL;
+	return 1;
 }
 
 static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a7618cf28d0..33bda922988 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1694,9 +1694,9 @@ struct inode_operations {
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
 		      u64 len);
 	int (*update_time)(struct inode *, struct timespec *, int);
-	struct file * (*atomic_open)(struct inode *, struct dentry *,
-				     struct opendata *, unsigned open_flag,
-				     umode_t create_mode, int *opened);
+	int (*atomic_open)(struct inode *, struct dentry *,
+			   struct opendata *, unsigned open_flag,
+			   umode_t create_mode, int *opened);
 } ____cacheline_aligned;
 
 struct seq_file;