linux-kernel - Re: linux-next: Tree for Jun 20 (hweight return type)

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Message-ID: <4FE27471.8050505@xenotime.net>
Date:	Wed, 20 Jun 2012 18:10:09 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: Tree for Jun 20 (hweight return type)

On 06/20/2012 12:35 AM, Stephen Rothwell wrote:

> Hi all,
> 
> Changes since 20120619:


Someone changes the return type of __const_hweight8() to
(unsigned long).  That causes printk format warnings when
hweight8/16() etc. is passed a constant:

drivers/input/joystick/analog.c:412:4: warning: format '%d' expects type 'int', but argument 4 has type 'long unsigned int'
drivers/input/joystick/analog.c:412:4: warning: format '%d' expects type 'int', but argument 5 has type 'long unsigned int'
drivers/input/joystick/analog.c:416:5: warning: format '%d' expects type 'int', but argument 5 has type 'long unsigned int'


Note that in

#define hweight8(w)  (__builtin_constant_p(w) ? __const_hweight8(w)  : __arch_hweight8(w))

__arch_hweight*() still returns unsigned int while __const_hweight*()
returns unsigned long.  This can't be good, can it?




-- 
~Randy
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