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Date: Mon, 15 Feb 2010 13:45:02 -0500 From: Don Zickus <dzickus@...hat.com> To: Cyrill Gorcunov <gorcunov@...il.com> Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, peterz@...radead.org, aris@...hat.com, Frederic Weisbecker <fweisbec@...il.com> Subject: Re: [PATCH 1/4] nmi_watchdog: use a boolean config flag for compiling On Mon, Feb 15, 2010 at 09:21:17PM +0300, Cyrill Gorcunov wrote: > On Mon, Feb 15, 2010 at 09:13:01PM +0300, Cyrill Gorcunov wrote: > ... > > > Looking through the code, is there ever case where 'apic' is undefined? > > > The arch_trigger_all_cpu_backtrace should match identically to the old nmi > > > code, so I am stuck on how to fix this. > > > > > > Thoughts? > > > > > > > It looks familiar to one problem with HW breakpoints "Kconfig select" > > issue Frederic fixed once not that long ago, if I recall correctly. > > > > So due to select we choose to compile hw_nmi.c, but CONFIG_LOCAL_APIC > > (or APIC on UP) is turned off. So apic.c is not compiled. And at stage > > of linking we get unresolved symbol. Hmm thanks for the feedback. The code can handle CONFIG_LOCAL_APIC being turned off. I'll look more at the UP stuff. > > > > I don't remember the details how Frederic fixed HW breakpoints "select" > > issue, CC'ed :) But you may google to find it out. > > > > Here is what I mean http://patchwork.kernel.org/patch/67973/ I don't believe I have the same issue. Thanks for the pointer. Cheers, Don -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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