Commit 1371be0f authored by Rusty Russell's avatar Rusty Russell
Browse files

cpumask: Use cpu_*_mask accessors code: alpha 



Impact: use new API, fix SMP bug.

Use the new accessors rather than frobbing bits directly.

This also removes the bug introduced in ee0c468b (alpha: compile
fixes) which had Alpha setting bits on an on-stack cpumask, not the
cpu_online_map.

Cc: Richard Henderson <rth@twiddle.net>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarMike Travis <travis@sgi.com>
Acked-by: default avatarIvan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
parent a0abd520

arch/alpha/kernel/process.c

+4 −4
Original line number Diff line number Diff line
@@ -93,8 +93,8 @@ common_shutdown_1(void *generic_ptr) 
	if (cpuid != boot_cpuid) {

		flags |= 0x00040000UL; /* "remain halted" */

		*pflags = flags;

		cpu_clear(cpuid, cpu_present_map);

		cpu_clear(cpuid, cpu_possible_map);

		set_cpu_present(cpuid, false);

		set_cpu_possible(cpuid, false);

		halt();

	}

#endif
@@ -120,8 +120,8 @@ common_shutdown_1(void *generic_ptr) 


#ifdef CONFIG_SMP

	/* Wait for the secondaries to halt. */

	cpu_clear(boot_cpuid, cpu_present_map);

	cpu_clear(boot_cpuid, cpu_possible_map);

	set_cpu_present(boot_cpuid, false);

	set_cpu_possible(boot_cpuid, false);

	while (cpus_weight(cpu_present_map))

		barrier();

#endif

arch/alpha/kernel/smp.c

+6 −6
Original line number Diff line number Diff line
@@ -120,12 +120,12 @@ void __cpuinit 
smp_callin(void)

{

	int cpuid = hard_smp_processor_id();

	cpumask_t mask = cpu_online_map;



	if (cpu_test_and_set(cpuid, mask)) {

	if (cpu_online(cpuid)) {

		printk("??, cpu 0x%x already present??\n", cpuid);

		BUG();

	}

	set_cpu_online(cpuid, true);



	/* Turn on machine checks.  */

	wrmces(7);
@@ -436,8 +436,8 @@ setup_smp(void) 
				((char *)cpubase + i*hwrpb->processor_size);

			if ((cpu->flags & 0x1cc) == 0x1cc) {

				smp_num_probed++;

				cpu_set(i, cpu_possible_map);

				cpu_set(i, cpu_present_map);

				set_cpu_possible(i, true);

				set_cpu_present(i, true);

				cpu->pal_revision = boot_cpu_palrev;

			}
@@ -470,8 +470,8 @@ smp_prepare_cpus(unsigned int max_cpus) 


	/* Nothing to do on a UP box, or when told not to.  */

	if (smp_num_probed == 1 || max_cpus == 0) {

		cpu_possible_map = cpumask_of_cpu(boot_cpuid);

		cpu_present_map = cpumask_of_cpu(boot_cpuid);

		init_cpu_possible(cpumask_of(boot_cpuid));

		init_cpu_present(cpumask_of(boot_cpuid));

		printk(KERN_INFO "SMP mode deactivated.\n");

		return;

	}

CRA Git | Maintained and supported by SUSTech CRA and CCSE