lguest uses asm-offsets to generate ... offsets, obviously, for use in the lguest switcher code. When the hypervisor code is built as a module though, the asm offsets it needs won't be generated since CONFIG_LGUEST will be undefined. Signed-off-by: Kyle McMartin <kmcmartin(a)redhat.com&gt; --- diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index a33d530..44bafdd 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -134,7 +134,7 @@ void foo(void) OFFSET(LGUEST_DATA_pgdir, lguest_data, pgdir); #endif -#ifdef CONFIG_LGUEST +#if defined(CONFIG_LGUEST) || defined(CONFIG_LGUEST_MODULE) BLANK(); OFFSET(LGUEST_PAGES_host_gdt_desc, lguest_pages, state.host_gdt_desc); OFFSET(LGUEST_PAGES_host_idt_desc, lguest_pages, state.host_idt_desc);