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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2006-06-04 05:51:34 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-05 15:29:16 -0400
commitc7d2d28b9851d0ffc9924b0e36bac806d18ebf25 (patch)
treef48fadad9a5cce62f7016cb48bc258928cb49114 /arch
parentba0c19ed6a61a96d4b42b81cb19d4bc81b5f728c (diff)
[PATCH] alpha: SMP IRQ routing fix
From: Ivan Kokshaysky <ink@jurassic.park.msu.ru> After removal of fixup_cpu_present_map() function Alpha ended up with an empty cpu_present_map, so secondary CPUs on SMP systems are not being started. Worse, on some platforms we route interrupts to secondary CPUs using cpu_possible_map which is still populated properly. As a result, these interrupts go nowhere so the machines like DP264 aren't able to boot even with a primary CPU. Fixed basically by s/cpu_present_mask/cpu_present_map/. Thanks to Ernst Herzberg for reporting the bug and testing the fix. Cc: Ernst Herzberg <list-lkml@net4u.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/kernel/alpha_ksyms.c1
-rw-r--r--arch/alpha/kernel/process.c6
-rw-r--r--arch/alpha/kernel/smp.c14
-rw-r--r--arch/alpha/kernel/sys_titan.c2
4 files changed, 8 insertions, 15 deletions
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c
index c645c5e14786..2b245ad731ee 100644
--- a/arch/alpha/kernel/alpha_ksyms.c
+++ b/arch/alpha/kernel/alpha_ksyms.c
@@ -182,7 +182,6 @@ EXPORT_SYMBOL(smp_num_cpus);
182EXPORT_SYMBOL(smp_call_function); 182EXPORT_SYMBOL(smp_call_function);
183EXPORT_SYMBOL(smp_call_function_on_cpu); 183EXPORT_SYMBOL(smp_call_function_on_cpu);
184EXPORT_SYMBOL(_atomic_dec_and_lock); 184EXPORT_SYMBOL(_atomic_dec_and_lock);
185EXPORT_SYMBOL(cpu_present_mask);
186#endif /* CONFIG_SMP */ 185#endif /* CONFIG_SMP */
187 186
188/* 187/*
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 9924fd07743a..c760a831fd1a 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -94,7 +94,7 @@ common_shutdown_1(void *generic_ptr)
94 if (cpuid != boot_cpuid) { 94 if (cpuid != boot_cpuid) {
95 flags |= 0x00040000UL; /* "remain halted" */ 95 flags |= 0x00040000UL; /* "remain halted" */
96 *pflags = flags; 96 *pflags = flags;
97 clear_bit(cpuid, &cpu_present_mask); 97 cpu_clear(cpuid, cpu_present_map);
98 halt(); 98 halt();
99 } 99 }
100#endif 100#endif
@@ -120,8 +120,8 @@ common_shutdown_1(void *generic_ptr)
120 120
121#ifdef CONFIG_SMP 121#ifdef CONFIG_SMP
122 /* Wait for the secondaries to halt. */ 122 /* Wait for the secondaries to halt. */
123 cpu_clear(boot_cpuid, cpu_possible_map); 123 cpu_clear(boot_cpuid, cpu_present_map);
124 while (cpus_weight(cpu_possible_map)) 124 while (cpus_weight(cpu_present_map))
125 barrier(); 125 barrier();
126#endif 126#endif
127 127
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 185255416e85..4dc273e537fd 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -68,7 +68,6 @@ enum ipi_message_type {
68static int smp_secondary_alive __initdata = 0; 68static int smp_secondary_alive __initdata = 0;
69 69
70/* Which cpus ids came online. */ 70/* Which cpus ids came online. */
71cpumask_t cpu_present_mask;
72cpumask_t cpu_online_map; 71cpumask_t cpu_online_map;
73 72
74EXPORT_SYMBOL(cpu_online_map); 73EXPORT_SYMBOL(cpu_online_map);
@@ -439,7 +438,7 @@ setup_smp(void)
439 if ((cpu->flags & 0x1cc) == 0x1cc) { 438 if ((cpu->flags & 0x1cc) == 0x1cc) {
440 smp_num_probed++; 439 smp_num_probed++;
441 /* Assume here that "whami" == index */ 440 /* Assume here that "whami" == index */
442 cpu_set(i, cpu_present_mask); 441 cpu_set(i, cpu_present_map);
443 cpu->pal_revision = boot_cpu_palrev; 442 cpu->pal_revision = boot_cpu_palrev;
444 } 443 }
445 444
@@ -450,11 +449,10 @@ setup_smp(void)
450 } 449 }
451 } else { 450 } else {
452 smp_num_probed = 1; 451 smp_num_probed = 1;
453 cpu_set(boot_cpuid, cpu_present_mask);
454 } 452 }
455 453
456 printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_mask = %lx\n", 454 printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_map = %lx\n",
457 smp_num_probed, cpu_possible_map.bits[0]); 455 smp_num_probed, cpu_present_map.bits[0]);
458} 456}
459 457
460/* 458/*
@@ -473,7 +471,7 @@ smp_prepare_cpus(unsigned int max_cpus)
473 471
474 /* Nothing to do on a UP box, or when told not to. */ 472 /* Nothing to do on a UP box, or when told not to. */
475 if (smp_num_probed == 1 || max_cpus == 0) { 473 if (smp_num_probed == 1 || max_cpus == 0) {
476 cpu_present_mask = cpumask_of_cpu(boot_cpuid); 474 cpu_present_map = cpumask_of_cpu(boot_cpuid);
477 printk(KERN_INFO "SMP mode deactivated.\n"); 475 printk(KERN_INFO "SMP mode deactivated.\n");
478 return; 476 return;
479 } 477 }
@@ -486,10 +484,6 @@ smp_prepare_cpus(unsigned int max_cpus)
486void __devinit 484void __devinit
487smp_prepare_boot_cpu(void) 485smp_prepare_boot_cpu(void)
488{ 486{
489 /*
490 * Mark the boot cpu (current cpu) as online
491 */
492 cpu_set(smp_processor_id(), cpu_online_map);
493} 487}
494 488
495int __devinit 489int __devinit
diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index 5f84417eeb7b..2551fb49ae09 100644
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -66,7 +66,7 @@ titan_update_irq_hw(unsigned long mask)
66 register int bcpu = boot_cpuid; 66 register int bcpu = boot_cpuid;
67 67
68#ifdef CONFIG_SMP 68#ifdef CONFIG_SMP
69 cpumask_t cpm = cpu_present_mask; 69 cpumask_t cpm = cpu_present_map;
70 volatile unsigned long *dim0, *dim1, *dim2, *dim3; 70 volatile unsigned long *dim0, *dim1, *dim2, *dim3;
71 unsigned long mask0, mask1, mask2, mask3, dummy; 71 unsigned long mask0, mask1, mask2, mask3, dummy;
72 72