linux-kernel - Re: [PATCH] tools/perf/util/*.c: Use "%zd" output format for size

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Date:   Tue, 25 Feb 2020 15:02:39 -0800
From:   Joe Perches <joe@...ches.com>
To:     Xiao Yang <yangx.jy@...fujitsu.com>, linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org
Subject: Re: [PATCH] tools/perf/util/*.c: Use "%zd" output format for size_t
 type

On Tue, 2020-02-25 at 14:39 +0800, Xiao Yang wrote:
> Avoid the following errors when building perf:
> -----------------------------------------------
> util/session.c: In function 'perf_session__process_compressed_event':
> util/session.c:91:11: error: format '%ld' expects argument of type 'long int', but argument 4 has type 'size_t {aka unsigned int}' [-Werror=format=]
>   pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
[]
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
[]
> @@ -88,7 +88,7 @@ static int perf_session__process_compressed_event(struct perf_session *session,
>  		session->decomp_last = decomp;
>  	}
>  
> -	pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
> +	pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);

likely better as %zu, etc...