linux-kernel - Re: [PATCH v1 4/5] perf: Introduce address range filtering

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Date:	Mon, 25 Apr 2016 16:14:20 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	vince@...ter.net, eranian@...gle.com,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: Re: [PATCH v1 4/5] perf: Introduce address range filtering

On Fri, Apr 22, 2016 at 07:19:11PM +0300, Alexander Shishkin wrote:
>  /**
> + * struct perf_addr_filter - address range filter definition
> + * @entry:	event's filter list linkage
> + * @inode:	object file's inode for file-based filters
> + * @offset:	filter range offset
> + * @size:	filter range size
> + * @range:	1: range, 0: address
> + * @filter:	1: filter/start, 0: stop
> + * @kernel:	1: kernel, 0: file-based
> + *
> + * This is a hardware-agnostic filter configuration as specified by the user.
> + */
> +struct perf_addr_filter {
> +	struct list_head	entry;
> +	struct inode		*inode;
> +	unsigned long		offset;
> +	unsigned long		size;
> +	unsigned int		range	: 1,
> +				filter	: 1,
> +				kernel	: 1;
> +};

FWIW, why not have !inode be kernel?