No cpu_add_remove_lock in do_boot_cpu.

The do_boot_cpu() will be called when system booting or CPU
online. When system booting, we don't need hold this lock. When system
online, the lock is held already by cpu_up.

Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 98f2c1155cbeace7f6fa8f5475eb24bff031dd61..fcac97419a3d22fc8266fd3f08469cf073f14075 100644 (file)
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -985,10 +985,8 @@ static int __devinit do_boot_cpu(int apicid, int cpu)
                cpucount--;
 
                /* Mark the CPU as non-present */
-               spin_lock(&cpu_add_remove_lock);
                x86_cpu_to_apicid[cpu] = BAD_APICID;
                cpu_clear(cpu, cpu_present_map);
-               spin_unlock(&cpu_add_remove_lock);
        } else {
        }