linux-ext4 - Re: [PATCH,RFC] ext3: Add support for non-native signed/unsigned htree hash algorithms

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Date:	Fri, 24 Oct 2008 11:25:29 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andreas Dilger <adilger@....com>
CC:	Theodore Tso <tytso@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH,RFC] ext3: Add support for non-native signed/unsigned
 htree hash algorithms

Andreas Dilger wrote:
>
>> Hmm..... is it considered safe to depend on the userspace limits.h
>> header file?  I guess if we trust that header file to be correct we
>> could check the value of CHAR_MIN and/or CHAR_MAX as defined by
>> limits.h.
>>     
>
> That would likely fail on cross-compiled environments, right?
>   

/usr/include/limits.h uses #include_next to pick up gcc's private 
limits.h, so it should be safe to use in a kernel cross-build 
environment.  (Picking up the compiler's limits.h directly would be better.)

    J
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