sparc64: Kill error_mask from hypervisor_xcall_deliver().

It can eat up a lot of stack space when NR_CPUS is large.
We retain some of it's functionality by reporting at least one
of the cpu's which are seen in error state.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 2387a9b..ac8996e 100644 (file)
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -626,16 +626,15 @@ retry:
 /* Multi-cpu list version.  */
 static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
 {
-       int retries, this_cpu, prev_sent, i;
+       int retries, this_cpu, prev_sent, i, saw_cpu_error;
        unsigned long status;
-       cpumask_t error_mask;
        u16 *cpu_list;
 
        this_cpu = smp_processor_id();
 
        cpu_list = __va(tb->cpu_list_pa);
 
-       cpus_clear(error_mask);
+       saw_cpu_error = 0;
        retries = 0;
        prev_sent = 0;
        do {
@@ -680,10 +679,9 @@ static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
                                        continue;
 
                                err = sun4v_cpu_state(cpu);
-                               if (err >= 0 &&
-                                   err == HV_CPU_STATE_ERROR) {
+                               if (err == HV_CPU_STATE_ERROR) {
+                                       saw_cpu_error = (cpu + 1);
                                        cpu_list[i] = 0xffff;
-                                       cpu_set(cpu, error_mask);
                                }
                        }
                } else if (unlikely(status != HV_EWOULDBLOCK))
@@ -707,19 +705,15 @@ static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
                }
        } while (1);
 
-       if (unlikely(!cpus_empty(error_mask)))
+       if (unlikely(saw_cpu_error))
                goto fatal_mondo_cpu_error;
 
        return;
 
 fatal_mondo_cpu_error:
        printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus "
-              "were in error state\n",
-              this_cpu);
-       printk(KERN_CRIT "CPU[%d]: Error mask [ ", this_cpu);
-       for_each_cpu_mask_nr(i, error_mask)
-               printk("%d ", i);
-       printk("]\n");
+              "(including %d) were in error state\n",
+              this_cpu, saw_cpu_error - 1);
        return;
 
 fatal_mondo_timeout: