linux-kernel - Re: [PATCH 3/6] dyndbg: add more info to -E2BIG log warning

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Date:	Mon, 24 Sep 2012 15:00:35 -0400
From:	Jason Baron <jbaron@...hat.com>
To:	Jim Cromie <jim.cromie@...il.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: [PATCH 3/6] dyndbg: add more info to -E2BIG log warning

On Tue, Sep 18, 2012 at 05:36:44PM -0600, Jim Cromie wrote:
> Tell user how big the attempted write was, in case its not obvious.
> This helped identify a missing flush in my stress-test script.
> 
> Signed-off-by: Jim Cromie <jim.cromie@...il.com>
> ---
>  lib/dynamic_debug.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
> index 43ae319..85258a8 100644
> --- a/lib/dynamic_debug.c
> +++ b/lib/dynamic_debug.c
> @@ -693,7 +693,8 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
>  	if (len == 0)
>  		return 0;
>  	if (len > USER_BUF_PAGE - 1) {
> -		pr_warn("expected <%d bytes into control\n", USER_BUF_PAGE);
> +		pr_warn("expected <%d bytes into control, you wrote %d\n",
> +			USER_BUF_PAGE, (int) len);

The style here, I think, is generally to leave out the space, ie: (int)len.

Thanks,

-Jason

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