x86: boot secondary cpus through initial_code

remove "initialize_secondary". Boot both architectures via
initial_code.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 2 insertions, 25 deletions

diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index ffb73a5b609f..f67e93441caf 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -452,7 +452,7 @@ is386:	movl $2,%ecx		# set MP
         je   1f
         movl $(__KERNEL_PERCPU), %eax
         movl %eax,%fs           # set this cpu's percpu
-        jmp initialize_secondary # all other CPUs call initialize_secondary
+        movl (stack_start), %esp
 1:
 #endif /* CONFIG_SMP */
         jmp *(initial_code)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index fe2bd515d6cc..2a0d39f3f2f1 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -349,28 +349,6 @@ static void __cpuinit start_secondary(void *unused)
         cpu_idle();
 }
 
-#ifdef CONFIG_X86_32
-/*
- * Everything has been set up for the secondary
- * CPUs - they just need to reload everything
- * from the task structure
- * This function must not return.
- */
-void __devinit initialize_secondary(void)
-{
-        /*
-         * We don't actually need to load the full TSS,
-         * basically just the stack pointer and the ip.
-         */
-
-        asm volatile(
-                "movl %0,%%esp\n\t"
-                "jmp *%1"
-                :
-                :"m" (current->thread.sp), "m" (current->thread.ip));
-}
-#endif
-
 static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_X86_32
@@ -892,16 +870,15 @@ do_rest:
 #ifdef CONFIG_X86_32
         per_cpu(current_task, cpu) = c_idle.idle;
         init_gdt(cpu);
-        c_idle.idle->thread.ip = (unsigned long) start_secondary;
         /* Stack for startup_32 can be just as for start_secondary onwards */
         irq_ctx_init(cpu);
 #else
         cpu_pda(cpu)->pcurrent = c_idle.idle;
         load_sp0(&per_cpu(init_tss, cpu), &c_idle.idle->thread);
-        initial_code = (unsigned long)start_secondary;
         clear_tsk_thread_flag(c_idle.idle, TIF_FORK);
 #endif
         early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
+        initial_code = (unsigned long)start_secondary;
         stack_start.sp = (void *) c_idle.idle->thread.sp;
 
         /* start_ip had better be page-aligned! */