linux-kernel - __dynamic_array() of 1 in blktrace?

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Message-ID: <20220701122400.5a0f367e@gandalf.local.home>
Date:   Fri, 1 Jul 2022 12:24:00 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Jens Axboe <axboe@...com>, LKML <linux-kernel@...r.kernel.org>
Subject: __dynamic_array() of 1 in blktrace?

Hi,

I'm adding a __vstring() to remove all the open coded vsprintf() calls in
events, and came across several of theses in include/trace/events/block:

		__dynamic_array( char,  cmd,    1)

[..]

		__get_str(cmd)[0] = '\0';

Is this to keep backward compatibility with user space?

does it need to be a dynamic array?

-- Steve