From 39d83a5d684a457046aa2a6dac60f105966e78e9 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Mon, 20 Apr 2009 13:02:29 -0700 Subject: [PATCH] x86: x2apic, IR: Clean up panic() with nox2apic boot option Instead of panic() ignore the "nox2apic" boot option when BIOS has already enabled x2apic prior to OS handover. [ Impact: printk warning instead of panic() when BIOS has enabled x2apic already ] Signed-off-by: Suresh Siddha Cc: dwmw2@infradead.org Cc: Weidong Han LKML-Reference: <20090420200450.425091000@linux-os.sc.intel.com> Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/apic.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 2b30e520dce3..d32f5589f1dd 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -141,8 +141,12 @@ static int x2apic_preenabled; static int disable_x2apic; static __init int setup_nox2apic(char *str) { - if (x2apic_enabled()) - panic("Bios already enabled x2apic, can't enforce nox2apic"); + if (x2apic_enabled()) { + pr_warning("Bios already enabled x2apic, " + "can't enforce nox2apic"); + return 0; + } + disable_x2apic = 1; setup_clear_cpu_cap(X86_FEATURE_X2APIC); return 0; -- 2.39.2