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Date: Wed, 11 Mar 2009 16:46:32 +0000
From: James Bottomley <James.Bottomley@...senPartnership.com>
To: Rusty Russell <rusty@...tcorp.com.au>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 2/2] cpumask: use modern cpumask methods in
arch/x86/mach-voyager/voyager_smp.c
On Wed, 2009-03-11 at 17:02 +1030, Rusty Russell wrote:
> Impact: cleanup
>
> 1) cpus_addr() -> cpumask_bits()
> 2) cpu_online_map -> cpu_online_mask
> 3) init_cpu_online & set_cpu_online
> 4) smp_commenced_mask is an unsigned long, not a cpumask_t (easier than
> a cpumask_var_t).
>
> Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
> To: James.Bottomley@...senPartnership.com
Looks fine ... I'll just have to do some integration with this patch
http://marc.info/?l=linux-kernel&m=123653138913095
Which contains a few changes in this area.
James
> ---
> arch/x86/mach-voyager/voyager_smp.c | 45 +++++++++++++++++-------------------
> 1 file changed, 22 insertions(+), 23 deletions(-)
>
> diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
> --- a/arch/x86/mach-voyager/voyager_smp.c
> +++ b/arch/x86/mach-voyager/voyager_smp.c
> @@ -132,7 +132,7 @@ static inline void send_CPI_allbutself(_
> static inline void send_CPI_allbutself(__u8 cpi)
> {
> __u8 cpu = smp_processor_id();
> - __u32 mask = cpus_addr(cpu_online_map)[0] & ~(1 << cpu);
> + __u32 mask = cpumask_bits(cpu_online_mask)[0] & ~(1 << cpu);
> send_CPI(mask, cpi);
> }
>
> @@ -207,7 +207,7 @@ static __u32 cpu_booted_map;
>
> /* the synchronize flag used to hold all secondary CPUs spinning in
> * a tight loop until the boot sequence is ready for them */
> -static cpumask_t smp_commenced_mask = CPU_MASK_NONE;
> +static unsigned long smp_commenced_mask;
>
> /* This is for the new dynamic CPU boot code */
>
> @@ -357,7 +357,7 @@ void __init find_smp_config(void)
> /* initialize the CPU structures (moved from smp_boot_cpus) */
> for (i = 0; i < nr_cpu_ids; i++)
> cpu_irq_affinity[i] = ~0;
> - cpu_online_map = cpumask_of_cpu(boot_cpu_id);
> + init_cpu_online(cpumask_of(boot_cpu_id));
>
> /* The boot CPU must be extended */
> voyager_extended_vic_processors = 1 << boot_cpu_id;
> @@ -471,18 +471,18 @@ static void __init start_secondary(void
> * permission to proceed. Without this, the new per CPU stuff
> * in the softirqs will fail */
> local_irq_disable();
> - cpu_set(cpuid, cpu_callin_map);
> + cpumask_set_cpu(cpuid, cpu_callin_mask);
>
> /* signal that we're done */
> cpu_booted_map = 1;
>
> - while (!cpu_isset(cpuid, smp_commenced_mask))
> + while (!test_bit(cpuid, &smp_commenced_mask))
> rep_nop();
> local_irq_enable();
>
> local_flush_tlb();
>
> - cpu_set(cpuid, cpu_online_map);
> + set_cpu_online(cpuid, true);
> wmb();
> cpu_idle();
> }
> @@ -605,8 +605,8 @@ static void __init do_boot_cpu(__u8 cpu)
> printk("CPU%d: ", cpu);
> print_cpu_info(&cpu_data(cpu));
> wmb();
> - cpu_set(cpu, cpu_callout_map);
> - cpu_set(cpu, cpu_present_map);
> + cpumask_set_cpu(cpu, cpu_callout_mask);
> + set_cpu_present(cpu, true);
> } else {
> printk("CPU%d FAILED TO BOOT: ", cpu);
> if (*
> @@ -668,8 +668,8 @@ void __init smp_boot_cpus(void)
> /* enable our own CPIs */
> vic_enable_cpi();
>
> - cpu_set(boot_cpu_id, cpu_online_map);
> - cpu_set(boot_cpu_id, cpu_callout_map);
> + set_cpu_online(boot_cpu_id, true);
> + cpumask_set_cpu(boot_cpu_id, cpu_callout_mask);
>
> /* loop over all the extended VIC CPUs and boot them. The
> * Quad CPUs must be bootstrapped by their extended VIC cpu */
> @@ -832,7 +832,7 @@ voyager_flush_tlb_others(unsigned long c
>
> if (!cpumask)
> BUG();
> - if ((cpumask & cpus_addr(cpu_online_map)[0]) != cpumask)
> + if ((cpumask & cpumask_bits(cpu_online_mask)[0]) != cpumask)
> BUG();
> if (cpumask & (1 << smp_processor_id()))
> BUG();
> @@ -951,7 +951,7 @@ static void smp_stop_cpu_function(void *
> static void smp_stop_cpu_function(void *dummy)
> {
> VDEBUG(("VOYAGER SMP: CPU%d is STOPPING\n", smp_processor_id()));
> - cpu_clear(smp_processor_id(), cpu_online_map);
> + set_cpu_online(smp_processor_id(), false);
> local_irq_disable();
> for (;;)
> halt();
> @@ -1608,9 +1608,9 @@ void set_vic_irq_affinity(unsigned int i
> unsigned long irq_mask = 1 << irq;
> int cpu;
>
> - real_mask = cpus_addr(*mask)[0] & voyager_extended_vic_processors;
> + real_mask = cpumask_bits(mask)[0] & voyager_extended_vic_processors;
>
> - if (cpus_addr(*mask)[0] == 0)
> + if (cpumask_bits(mask)[0] == 0)
> /* can't have no CPUs to accept the interrupt -- extremely
> * bad things will happen */
> return;
> @@ -1752,24 +1752,23 @@ static void __cpuinit voyager_smp_prepar
> init_gdt(smp_processor_id());
> switch_to_new_gdt();
>
> - cpu_online_map = cpumask_of_cpu(smp_processor_id());
> - cpu_callout_map = cpumask_of_cpu(smp_processor_id());
> - cpu_callin_map = CPU_MASK_NONE;
> - cpu_present_map = cpumask_of_cpu(smp_processor_id());
> -
> + init_cpu_online(cpumask_of(smp_processor_id()));
> + cpumask_copy(cpu_callout_mask, cpumask_of(smp_processor_id()));
> + cpumask_clear(cpu_callin_mask);
> + init_cpu_present(cpumask_of(smp_processor_id()));
> }
>
> static int __cpuinit voyager_cpu_up(unsigned int cpu)
> {
> /* This only works at boot for x86. See "rewrite" above. */
> - if (cpu_isset(cpu, smp_commenced_mask))
> + if (test_bit(cpu, &smp_commenced_mask))
> return -ENOSYS;
>
> /* In case one didn't come up */
> - if (!cpu_isset(cpu, cpu_callin_map))
> + if (!cpumask_test_cpu(cpu, cpu_callin_mask))
> return -EIO;
> /* Unleash the CPU! */
> - cpu_set(cpu, smp_commenced_mask);
> + set_bit(cpu, &smp_commenced_mask);
> while (!cpu_online(cpu))
> mb();
> return 0;
> @@ -1788,7 +1787,7 @@ void __init smp_setup_processor_id(void)
>
> static void voyager_send_call_func(const struct cpumask *callmask)
> {
> - __u32 mask = cpus_addr(*callmask)[0] & ~(1 << smp_processor_id());
> + __u32 mask = cpumask_bits(callmask)[0] & ~(1 << smp_processor_id());
> send_CPI(mask, VIC_CALL_FUNCTION_CPI);
> }
>
--
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