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Date: Sat, 28 Mar 2009 12:20:35 +0100 From: Ingo Molnar <mingo@...e.hu> To: "Michael K. Johnson" <johnsonm@...th.com> Cc: jmforbes@...uxtx.org, hpa@...or.com, Jordan_Hargrave@...l.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH] mark %esi as clobbered in E820 BIOS call * Michael K. Johnson <johnsonm@...th.com> wrote: > Justin and Peter, please review this for stable .y trees. Peter, > please review this for trunk unless you decide to do a more > extensive workaround for BIOS register clobbering. > > Thanks! > > $ cat e820-esi-clobber-workaround.patch > Jordan Hargrave diagnosed a BIOS clobbering %esi in the E820 call. > That particular BIOS has been fixed, but there is a possibility that > this is responsible for other occasional reports of early boot > failure, and it does not hurt to add %esi to the clobbers. nice fix! Would you mind to update the clobber list to include _all_ registers? I dont see why any of the other registers couldnt be clobbered by a BIOS, and this is boot-only code so micro-performance is not an issue. Ingo -- 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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