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From: Al Viro <viro@ZenIV.linux.org.uk>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Ingo Molnar <mingo@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 00/16 v3] tracing: Add new file system tracefs
Date: Mon, 26 Jan 2015 21:44:21 +0000	[thread overview]
Message-ID: <20150126214421.GP29656@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20150126155822.301523e3@gandalf.local.home>

On Mon, Jan 26, 2015 at 03:58:22PM -0500, Steven Rostedt wrote:
> On Mon, 26 Jan 2015 15:44:19 -0500
> Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > Now what I could also do is to only allow this to be called once. And
> > in that case, we can hard code what mkdir and rmdir are. This could
> > work as currently there only exists a single instance of the instances
> > directory.
> > 
> > I might just do that too.
> 
> And just did:
> 
> diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
> index c7eb4c58579e..13e17bf677f4 100644
> --- a/fs/tracefs/inode.c
> +++ b/fs/tracefs/inode.c
> @@ -50,6 +50,11 @@ static const struct file_operations tracefs_file_operations = {
>  	.llseek =	noop_llseek,
>  };
>  
> +struct tracefs_dir_ops {
> +	int (*mkdir)(const char *name);
> +	int (*rmdir)(const char *name);
> +};

Why go through that indirection at all...

> +struct dentry *tracefs_create_instance_dir(const char *name, struct dentry *parent,
> +					   int (*mkdir)(const char *name),
> +					   int (*rmdir)(const char *name));

... when there's exactly one caller of that thing, and the values of
mkdir and rmdir callbacks are the same on each call?

  reply	other threads:[~2015-01-26 21:44 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-26 15:09 Steven Rostedt
2015-01-26 15:09 ` [PATCH 01/16 v3] debugfs_{mkdir,create,link}(): get rid of redundant argument Steven Rostedt
2015-01-26 15:09 ` [PATCH 02/16 v3] debugfs: split the beginning and the end of __create_file() off Steven Rostedt
2015-01-26 15:09 ` [PATCH 03/16 v3] debugfs: kill __create_file() Steven Rostedt
2015-01-26 15:09 ` [PATCH 04/16 v3] fold debugfs_link() into caller Steven Rostedt
2015-01-26 15:09 ` [PATCH 05/16 v3] debugfs_mknod(): get rid useless arguments Steven Rostedt
2015-01-26 15:09 ` [PATCH 06/16 v3] fold debugfs_mkdir() into caller Steven Rostedt
2015-01-26 15:09 ` [PATCH 07/16 v3] fold debugfs_create() " Steven Rostedt
2015-01-26 15:09 ` [PATCH 08/16 v3] fold debugfs_mknod() into callers Steven Rostedt
2015-01-26 15:09 ` [PATCH 09/16 v3] debugfs: take mode-dependent parts of debugfs_get_inode() " Steven Rostedt
2015-01-26 15:09 ` [PATCH 10/16 v3] debugfs: split end_creating() into success and failure cases Steven Rostedt
2015-01-26 15:09 ` [PATCH 11/16 v3] new primitive: debugfs_create_automount() Steven Rostedt
2015-01-26 15:09 ` [PATCH 12/16 v3] tracefs: Add new tracefs file system Steven Rostedt
2015-01-26 15:09 ` [PATCH 13/16 v3] tracing: Convert the tracing facility over to use tracefs Steven Rostedt
2015-01-26 15:09 ` [PATCH 14/16 v3] tracing: Automatically mount tracefs on debugfs/tracing Steven Rostedt
2015-01-26 15:09 ` [PATCH 15/16 v3] tracefs: Add directory /sys/kernel/tracing Steven Rostedt
2015-01-26 15:09 ` [PATCH 16/16 v3] tracing: Have mkdir and rmdir be part of tracefs Steven Rostedt
2015-01-26 19:30 ` [PATCH 00/16 v3] tracing: Add new file system tracefs Al Viro
2015-01-26 20:42   ` Steven Rostedt
2015-01-26 20:44     ` Steven Rostedt
2015-01-26 20:58       ` Steven Rostedt
2015-01-26 21:44         ` Al Viro [this message]
2015-01-26 21:46     ` Al Viro
2015-01-26 23:02       ` Al Viro
2015-01-26 23:39         ` Steven Rostedt
2015-01-26 23:43       ` Steven Rostedt
2015-01-26 23:49         ` Steven Rostedt
2015-01-27  0:39           ` Steven Rostedt
2015-01-27  4:34             ` Al Viro
2015-01-27 15:15               ` Steven Rostedt
2015-01-27  0:37         ` Al Viro
2015-01-27  1:02           ` Steven Rostedt
2015-01-27  1:03             ` Steven Rostedt
2015-01-27  4:38               ` Al Viro
2015-01-27 15:19                 ` Steven Rostedt
2015-01-27 15:44                   ` Steven Rostedt
2015-01-26 21:40   ` Al Viro
2015-01-26 23:37     ` Steven Rostedt
2015-01-27  2:34       ` Steven Rostedt
2015-01-27  4:46         ` Al Viro

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