From 1e30327eeb08420e75f6296aac0625f361948028 Mon Sep 17 00:00:00 2001 From: Andrew Cooper Date: Fri, 16 Aug 2013 11:46:25 +0200 Subject: [PATCH] x86/boot: Remove stack segment parameter from smpboot The stack segment is legacy remnant of a 32bit hypervisor, and not used in 64bit. Furthermore, the unsigned short in the structure actually aliases whatever the linker decides to put next in the data section. Drop the extern struct definition and change it to a simple void pointer, which matches its definition in arch/x86/boot/x86_64.S Signed-off-by: Andrew Cooper --- xen/arch/x86/smpboot.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c index 3df4e882a9..9f81c7ba62 100644 --- a/xen/arch/x86/smpboot.c +++ b/xen/arch/x86/smpboot.c @@ -393,10 +393,7 @@ void start_secondary(void *unused) startup_cpu_idle_loop(); } -extern struct { - void * esp; - unsigned short ss; -} stack_start; +extern void *stack_start; static int wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) { @@ -555,7 +552,7 @@ static int do_boot_cpu(int apicid, int cpu) printk("Booting processor %d/%d eip %lx\n", cpu, apicid, start_eip); - stack_start.esp = stack_base[cpu]; + stack_start = stack_base[cpu]; /* This grunge runs the startup process for the targeted processor. */ @@ -734,7 +731,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) boot_cpu_physical_apicid = get_apic_id(); x86_cpu_to_apicid[0] = boot_cpu_physical_apicid; - stack_base[0] = stack_start.esp; + stack_base[0] = stack_start; if ( !zalloc_cpumask_var(&per_cpu(cpu_sibling_mask, 0)) || !zalloc_cpumask_var(&per_cpu(cpu_core_mask, 0)) ) -- 2.30.2