linux-kernel - Re: [PATCH 2/2] tracing/events: introduce __dynamic

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Message-ID: <20090601083004.GB2714@infradead.org>
Date:	Mon, 1 Jun 2009 04:30:04 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Christoph Hellwig <hch@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] tracing/events: introduce __dynamic_array()

On Mon, Jun 01, 2009 at 03:35:46PM +0800, Li Zefan wrote:
> __string() is limited:
> 
>   - it's a char array, but we may want to define array with other types
>   - a source string should be available, but we may just know the string size
> 
> We introduce __dynamic_array() to break those limitations, and __string()
> becomes a wrapper of it. As a side effect, now __get_str() can be used
> in TP_fast_assign but not only TP_print.
> 
> Take XFS for example, we have the string length in the dirent, but the
> string itself is not NULL-terminated, so __dynamic_array() can be used:

Nice one from the users POV!   Thanks a lot.

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