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Subject: Re: my patches won't compile under 2.4.7
To: kirk@braille.uwo.ca (Kirk Reiser)
Date: Wed, 25 Jul 2001 20:58:11 +0100 (BST)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <x7itgglrmd.fsf@speech.braille.uwo.ca> from "Kirk Reiser" at Jul 25, 2001 03:45:46 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> 
> As of 2.4.7 my patches to the kernel won't compile.  It appears to be
> something to do with devfs_fs_kernel.h being part of miscdevices.h.  I
> have sifted through the code but have not been able to determine
> exactly why they won't work any more.  Here is the error output from
> my compile:
> 
> gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 -march=i586    -c -o speakup.o speakup.c
> In file included from /usr/src/linux/include/linux/locks.h:8,
>                  from /usr/src/linux/include/linux/devfs_fs_kernel.h:6,
>                  from /usr/src/linux/include/linux/miscdevice.h:4,
>                  from speakup.c:63:
> /usr/src/linux/include/linux/pagemap.h:35: `currcons' undeclared here (not in a function)
> /usr/src/linux/include/linux/pagemap.h:35: parse error before `.'
> make[4]: *** [speakup.o] Error 1
> 
> I'm not sure even where to start trying to describe what I've looked
> at and what I don't understand.  It appears that page_cache_alloc() is
> now an inline function with an argument passed to it, where it used to
> be a #define with no arguments.  I see that struct misc_device now has
> a new member devfs_handle but the other drivers I've looked at rtc.c
> haven't changed their structure members to take this into account.  It
> seems nothing new is necessary because misc_register checks if it's
> been set or not.  The two error lines don't look to me to have anything
> to do with any of these things either currcons isn't used in any of
> the misc_device structure or anything I can see which might end up
> calling page_cache_alloc().  Can anyone give me any ideas what I
> should check to hunt down exactly what's going on here?  It almost
> looks like gcc is getting screwed up in it's parsing or something.
> 
> Any ideas will greatefully be accepted I'm lost!
> 
>   Kirk
> 
> -- 
> 
> Kirk Reiser				The Computer Braille Facility
> e-mail: kirk@braille.uwo.ca		University of Western Ontario
> phone: (519) 661-3061
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