Re: fast_copy_page sections?!

From: Arjan van de Ven (arjanv@redhat.com)
Date: Fri Jun 20 2003 - 04:10:01 EST

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On Fri, 2003-06-20 at 10:38, Karl Vogel wrote:
> In arch/i386/lib/mmx.c there is a function fast_copy_page() using some
> crafty asm statements. However I don't quite understand the part with the
> fixup sections?!

basically, if your cpu doesn't do prefetch, it will fault. The section
stuff adds an exception handler for this fault that zeroes out the
prefetch code so that next time there no longer is a prefetch() there.

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