linux-kernel - Re: [PATCH 1/3] perf tools: Add perf_data_file_

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Message-ID: <20131125192909.GA27323@ghostprotocols.net>
Date:	Mon, 25 Nov 2013 16:29:09 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mike Galbraith <efault@....de>,
	Stephane Eranian <eranian@...gle.com>,
	David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 1/3] perf tools: Add perf_data_file__write interface

Em Fri, Nov 22, 2013 at 03:24:26PM +0100, Jiri Olsa escreveu:
>  }
> +
> +ssize_t perf_data_file__write(struct perf_data_file *file,
> +			      void *buf, size_t size)
> +{
> +	ssize_t total = size;
> +
> +	while (size) {
> +		ssize_t ret = write(file->fd, buf, size);
> +
> +		if (ret < 0) {
> +			pr_err("failed to write perf data, error: %m\n");
> +			return -1;
> +		}
> +
> +		size -= ret;
> +		buf  += ret;
> +	}
> +
> +	return total;

So this is the functional equivalent of "readn", so please move it to
just after "readn" and make this just a simple wrapper.

- Arnaldo
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