Re: [PATCH]: i386: make x86_64 tsc header require i386 rather thanvice-versa

From: Andrew Morton
Date: Mon Mar 05 2007 - 22:10:47 EST


On Fri, 02 Mar 2007 22:10:33 -0500 Andres Salomon <dilinger@xxxxxxxxxx> wrote:

> Prior to commit 95492e4646e5de8b43d9a7908d6177fb737b61f0 ([PATCH] x86:
> rewrite SMP TSC sync code), the headers in asm-i386 did not really
> require anything in include/asm-x86_64. This means that distributions
> such as fedora did not include asm-x86_64 in kernel-devel headers for
> i386. Ingo's commit changed that, and broke things. This is easy
> enough to hack around in package builds by just including asm-x86_64 on
> i386, but that's kind of annoying. If anything, x86_64 should depend
> upon i386, not the other way around.
>
> This patch changes it so that asm-x86_64/tsc.h includes asm-i386/tsc.h,
> rather than vice-versa.

Agree - I don't see any gain in making the references be bidirectional, and
it just makes life more complicated. Knowing "x86_64 always references
i386" is a useful mental mark.

That, plus the kernel-headers point which you describe..

<looks at early_printk.c>
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