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Subject[sparc32] [3/13] sun4d cpu_present_map is a cpumask_t
On Wed, Aug 04, 2004 at 09:39:57PM -0700, William Lee Irwin III wrote:
> An analysis of the code determined that AP initialization called
> init_idle() no less than three times, 2 out of the three with incorrect
> numbers of arguments. This patch removes the superfluous calls.

cpu_present_map is a cpumask_t. Sweep arch/sparc/kernel/sun4d_smp.c so
that it is treated as such.

Index: mm2-2.6.8-rc2/arch/sparc/kernel/sun4d_smp.c
===================================================================
--- mm2-2.6.8-rc2.orig/arch/sparc/kernel/sun4d_smp.c
+++ mm2-2.6.8-rc2/arch/sparc/kernel/sun4d_smp.c
@@ -43,7 +43,6 @@
extern void calibrate_delay(void);

extern volatile int smp_processors_ready;
-extern unsigned long cpu_present_map;
extern int smp_num_cpus;
static int smp_highest_cpu;
extern int smp_threads_ready;
@@ -172,12 +171,12 @@
current_set[0] = NULL;

local_irq_enable();
- cpu_present_map = 0;
+ cpus_clear(cpu_present_map);

/* XXX This whole thing has to go. See sparc64. */
for (i = 0; !cpu_find_by_instance(i, NULL, &mid); i++)
- cpu_present_map |= (1<<mid);
- SMP_PRINTK(("cpu_present_map %08lx\n", cpu_present_map));
+ cpu_set(mid, cpu_present_map);
+ SMP_PRINTK(("cpu_present_map %08lx\n", cpus_addr(cpu_present_map)[0]));
for(i=0; i < NR_CPUS; i++)
__cpu_number_map[i] = -1;
for(i=0; i < NR_CPUS; i++)
@@ -195,7 +194,7 @@
if(i == boot_cpu_id)
continue;

- if(cpu_present_map & (1 << i)) {
+ if (cpu_isset(i, cpu_present_map)) {
extern unsigned long sun4d_cpu_startup;
unsigned long *entry = &sun4d_cpu_startup;
struct task_struct *p;
@@ -252,19 +251,19 @@
}
}
if(!(cpu_callin_map[i])) {
- cpu_present_map &= ~(1 << i);
+ cpu_clear(i, cpu_present_map);
__cpu_number_map[i] = -1;
}
}
local_flush_cache_all();
if(cpucount == 0) {
printk("Error: only one Processor found.\n");
- cpu_present_map = (1 << hard_smp4d_processor_id());
+ cpu_present_map = cpumask_of_cpu(hard_smp4d_processor_id());
} else {
unsigned long bogosum = 0;

for(i = 0; i < NR_CPUS; i++) {
- if(cpu_present_map & (1 << i)) {
+ if (cpu_isset(i, cpu_present_map)) {
bogosum += cpu_data(i).udelay_val;
smp_highest_cpu = i;
}
@@ -344,12 +343,13 @@

/* Init receive/complete mapping, plus fire the IPI's off. */
{
- register unsigned long mask;
+ cpumask_t mask;
register int i;

- mask = (cpu_present_map & ~(1 << hard_smp4d_processor_id()));
+ mask = cpumask_of_cpu(hard_smp4d_processor_id());
+ cpus_andnot(mask, cpu_present_map, mask);
for(i = 0; i <= high; i++) {
- if(mask & (1 << i)) {
+ if (cpu_isset(i, mask)) {
ccall_info.processors_in[i] = 0;
ccall_info.processors_out[i] = 0;
sun4d_send_ipi(i, IRQ_CROSS_CALL);
-
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