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Commit 3e970473 authored by Glauber Costa's avatar Glauber Costa Committed by Ingo Molnar
Browse files

x86: boot secondary cpus through initial_code 



remove "initialize_secondary". Boot both architectures via
initial_code.

Signed-off-by: default avatarGlauber Costa <gcosta@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e3f77edf

arch/x86/kernel/head_32.S

+1 −1
Original line number Diff line number Diff line
@@ -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)

arch/x86/kernel/smpboot.c

+1 −24
Original line number Diff line number Diff line
@@ -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 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu) 
#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! */