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To: root@chaos.analogic.com
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References: <Pine.LNX.4.53.0410051852250.351@chaos.analogic.com>
From: Roland Dreier <roland@topspin.com>
Date: Tue, 05 Oct 2004 16:47:21 -0700
In-Reply-To: <Pine.LNX.4.53.0410051852250.351@chaos.analogic.com> (Richard
 B. Johnson's message of "Tue, 5 Oct 2004 18:58:24 -0400 (EDT)")
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    Richard> I need to make some modules that have lots of assembly
    Richard> code.  This assembly uses the UNIX calling convention and
    Richard> can't be re-written (it would take many months). The new
    Richard> kernel is compiled with "-mregparam=2". I can't find
    Richard> where that's defined. I need to remove it because I
    Richard> cannot pass parameters to the assembly stuff in
    Richard> registers.

You should be able to use CONFIG_REGPARM to control this.  Another
option is just to mark the functions in your source as "asmlinkage"
(which is defined to "__attribute__((regparm(0)))" in
asm-i386/linkage.h).  The advantage of using asmlinkage is that your
code will work with anyone's kernel.

 - Roland

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