linux-kernel - Re: [PATCH] Doc: networking: txtimestamp: fix printf format warning

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Message-ID: <20150604173612.GB1530@localhost.localdomain>
Date:	Thu, 4 Jun 2015 19:36:12 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Frans Klaver <fransklaver@...il.com>
Cc:	Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Doc: networking: txtimestamp: fix printf format warning

On Wed, Jun 03, 2015 at 09:38:39PM +0200, Frans Klaver wrote:
> Documentation/networking/timestamping/txtimestamp.c: In function ‘__print_timestamp’:
> Documentation/networking/timestamping/txtimestamp.c:99:3: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int64_t’ [-Wformat=]
>    fprintf(stderr, "  (%+ld us)", cur_ms - prev_ms);
> 
> int64_t differs per platform, so a cast is required.

No cast is needed.  Use PRId64 in the format string instead.

Thanks,
Richard
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