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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH 1/3] module: deal with alignment issues in built-in
 module versions
Date: Thu, 17 Feb 2011 15:19:51 -0800 (PST)
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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 17 Feb 2011 15:08:52 -0800

> Where in gcc is the alignment expansion logic? I'd like to see what
> the rules are, just for my own perverse satisfaction.

The magic that overrides the alignment various cases is in the x86
specific code:

gcc/config/i386/i386.c

ix86_data_alignment() and ix86_local_alignment()