host_ldt_lock 227 arch/x86/um/ldt.c static DEFINE_SPINLOCK(host_ldt_lock); host_ldt_lock 238 arch/x86/um/ldt.c spin_lock(&host_ldt_lock); host_ldt_lock 241 arch/x86/um/ldt.c spin_unlock(&host_ldt_lock); host_ldt_lock 246 arch/x86/um/ldt.c spin_unlock(&host_ldt_lock);