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authorSuresh Siddha <suresh.b.siddha@intel.com>2010-03-31 18:04:47 -0700
committerIngo Molnar <mingo@elte.hu>2010-04-02 20:48:47 +0200
commit472a474c6630efd195d3738339fd1bdc8aa3b1aa (patch)
tree010b5b8191eba821b4940b4ab9fbd48ed468afa0 /arch/x86/power
parent51591e31dcb3716f03f962e26ec36a029aa46340 (diff)
downloadlinux-472a474c6630efd195d3738339fd1bdc8aa3b1aa.tar.gz
x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards
Jan Grossmann reported kernel boot panic while booting SMP kernel on his system with a single core cpu. SMP kernels call enable_IR_x2apic() from native_smp_prepare_cpus() and on platforms where the kernel doesn't find SMP configuration we ended up again calling enable_IR_x2apic() from the APIC_init_uniprocessor() call in the smp_sanity_check(). Thus leading to kernel panic. Don't call enable_IR_x2apic() and default_setup_apic_routing() from APIC_init_uniprocessor() in CONFIG_SMP case. NOTE: this kind of non-idempotent and assymetric initialization sequence is rather fragile and unclean, we'll clean that up in v2.6.35. This is the minimal fix for v2.6.34. Reported-by: Jan.Grossmann@kielnet.net Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: <jbarnes@virtuousgeek.org> Cc: <david.woodhouse@intel.com> Cc: <weidong.han@intel.com> Cc: <youquan.song@intel.com> Cc: <Jan.Grossmann@kielnet.net> Cc: <stable@kernel.org> # [v2.6.32.x, v2.6.33.x] LKML-Reference: <1270083887.7835.78.camel@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/power')
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