From: Fernando Luis Vazquez Cao Date: Wed, 9 May 2007 09:33:28 +0000 (-0700) Subject: Use the APIC to determine the hardware processor id - x86_64 X-Git-Tag: v2.6.22-rc1~277 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd988528f4a7d64908b427c251d727f3c3e88add;p=pandora-kernel.git Use the APIC to determine the hardware processor id - x86_64 hard_smp_processor_id used to be just a macro that hard-coded hard_smp_processor_id to 0 in the non SMP case. When booting non SMP kernels on hardware where the boot ioapic id is not 0 this turns out to be a problem. This is happens frequently in the case of kdump and once in a great while in the case of real hardware. Use the APIC to determine the hardware processor id in both UP and SMP kernels to fix this issue. Notice that hard_smp_processor_id is only used by SMP code or by code that works with apics so we do not need to handle the case when apics are not present and hard_smp_processor_id should never be called there. Signed-off-by: Fernando Luis Vazquez Cao Cc: "Luck, Tony" Acked-by: Andi Kleen Cc: "Eric W. Biederman" Cc: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed