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Commit 4c07ad69 authored by Glauber de Oliveira Costa's avatar Glauber de Oliveira Costa Committed by Ingo Molnar
Browse files

x86: don't span a new worker in __smp_prepare_cpu 



We can do it now that do_boot_cpu has its own worker.

Signed-off-by: default avatarGlauber Costa <gcosta@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 365c894c

arch/x86/kernel/smpboot_32.c

+2 −28
Original line number Original line Diff line number Diff line
@@ -699,44 +699,18 @@ void cpu_exit_clear(void) 
}

}

#endif

#endif





struct warm_boot_cpu_info {

	struct completion *complete;

	struct work_struct task;

	int apicid;

	int cpu;

};



static void __cpuinit do_warm_boot_cpu(struct work_struct *work)

{

	struct warm_boot_cpu_info *info =

		container_of(work, struct warm_boot_cpu_info, task);

	do_boot_cpu(info->apicid, info->cpu);

	complete(info->complete);

}



static void __cpuinit __smp_prepare_cpu(int cpu)

static void __cpuinit __smp_prepare_cpu(int cpu)

{

{

	DECLARE_COMPLETION_ONSTACK(done);

	struct warm_boot_cpu_info info;

	int	apicid;

	int	apicid;





	apicid = per_cpu(x86_cpu_to_apicid, cpu);

	apicid = per_cpu(x86_cpu_to_apicid, cpu);





	info.complete = &done;

	info.apicid = apicid;

	info.cpu = cpu;

	INIT_WORK(&info.task, do_warm_boot_cpu);



	/* init low mem mapping */

	/* init low mem mapping */

	clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,

	clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,

			min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));

			min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));

	flush_tlb_all();

	flush_tlb_all();

	if (!keventd_up() || current_is_keventd())



		info.task.func(&info.task);

	do_boot_cpu(apicid, cpu);

	else {

		schedule_work(&info.task);

		wait_for_completion(&done);

	}

}

}





static int boot_cpu_logical_apicid;

static int boot_cpu_logical_apicid;