linux-kernel - Re: [PATCH] Add definitions of USHRT

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Message-ID: <alpine.LNX.1.00.0803210312400.10642@fbirervta.pbzchgretzou.qr>
Date:	Fri, 21 Mar 2008 03:12:49 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Joe Perches <joe@...ches.com>
cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <clameter@....com>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Add definitions of USHRT_MAX


On Mar 20 2008 18:51, Joe Perches wrote:
> On Fri, 2008-03-21 at 09:40 +0800, Zhang, Yanmin wrote:
>> Add definitions of USHRT_MAX and others into kernel. ipc uses it and
>> slub implementation might also use it.
>> +#define USHRT_MAX	((u16)(~0U))
>> +#define SHRT_MAX	((s16)(USHRT_MAX>>1))
>> +#define SHRT_MIN	(-SHRT_MAX - 1)
>
> Perhaps it's better to use the most common kernel types?
> Perhaps U16_MAX, S16_MAX and S16_MIN?
>
> Don't you need to cast SHRT_MIN/S16_MIN too?
> #define S16_MIN ((s16)(-SHRT_MAX - 1))

SHRT_MAX is already s16.
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