[Xen-devel] [PATCH] x86: enable interrupts explicitly in __start_xen()

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

Instead of relying on smp_prepare_cpus() (via check_nmi_watchdog()) or
init_xen_time() (via init_platform_timer() -> plt_overflow())
implicitly enabling interrupts, enable them explicitly once safe to do
so (it may actually be possible to move this even further up, but I
don't think that would buy us much).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- 2008-11-20.orig/xen/arch/x86/setup.c        2008-11-19 17:37:33.000000000 
+0100
+++ 2008-11-20/xen/arch/x86/setup.c     2008-12-11 14:03:21.000000000 +0100
@@ -941,6 +941,9 @@ void __init __start_xen(unsigned long mb
         set_in_cr4(X86_CR4_OSFXSR);
     if ( cpu_has_xmm )
         set_in_cr4(X86_CR4_OSXMMEXCPT);
+
+    local_irq_enable();
+
 #ifdef CONFIG_X86_64
     vesa_mtrr_init();
 #endif




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