linux-kernel - Re: [PATCH] parse-events: Allow expressions in __print

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Date:	Wed, 08 Feb 2012 20:36:04 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
Cc:	Avi Kivity <avi@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] parse-events: Allow expressions in __print_symbolic()
 fields

On Sun, 2011-09-04 at 11:25 +0100, Stefan Hajnoczi wrote:
> The __print_symbolic() function takes a sequence of key-value pairs for
> pretty-printing a constant.  The new kvm:kvm_exit print fmt uses the
> expression:
> 
>   __print_symbolic(..., { 0x040 + 1, "DB excp" }, ...)
> 
> Currently only atoms are supported and this print fmt fails to parse.
> This patch adds support for expressions instead of just atoms so that
> 0x040 + 1 is parsed successfully.

Egad! Doing some early spring cleaning of my Inbox I stumbled across
this patch.

I'll apply it now, thanks!

Hey, if you ever send me a patch and after a week I don't reply to it,
don't be afraid to ping me about it. I sometimes get swarms of email
that I skim over, and will sometimes miss something like this.

Thanks!

-- Steve

> 
> Signed-off-by: Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
> ---
>  parse-events.c |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
> 
> diff --git a/parse-events.c b/parse-events.c
> index 1cdc3a9..e9b7e7d 100644
> --- a/parse-events.c
> +++ b/parse-events.c
> @@ -2110,6 +2110,13 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
>  
>  		free_token(token);
>  		type = process_arg(event, arg, &token);
> +
> +		if (type == EVENT_OP)
> +			type = process_op(event, arg, &token);
> +
> +		if (type == EVENT_ERROR)
> +			goto out_free;
> +
>  		if (test_type_token(type, token, EVENT_DELIM, ","))
>  			goto out_free;
>  


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