Re: [ACPI] Re: Linux 2.4.26-rc1 (cmpxchg vs 80386 build)

From: Len Brown
Date: Tue Mar 30 2004 - 12:50:42 EST

Sorry I didn't reply to this thread, after Alan wrote I figured
the topic was closed;-)

Yes, per my initial message, gcc _will_ generate cmpxchg for the 80386
build. Indeed, it has been doing so for over a year with ACPI's
previous private (and flawed) asm() invocation of cmpxchg.

Andi/Alan suggested we invoke cmpxchg always in ACPI,
but disable ACPI at boot-time in the unlikely event we find
ourselves running on a cpu without that instruction.

Luming has already taking a swing at this patch here:


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