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author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2006-06-04 02:51:34 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-05 12:29:16 -0700 |
commit | c7d2d28b9851d0ffc9924b0e36bac806d18ebf25 (patch) | |
tree | f48fadad9a5cce62f7016cb48bc258928cb49114 | |
parent | ba0c19ed6a61a96d4b42b81cb19d4bc81b5f728c (diff) | |
download | kernel_goldelico_gta04-c7d2d28b9851d0ffc9924b0e36bac806d18ebf25.zip kernel_goldelico_gta04-c7d2d28b9851d0ffc9924b0e36bac806d18ebf25.tar.gz kernel_goldelico_gta04-c7d2d28b9851d0ffc9924b0e36bac806d18ebf25.tar.bz2 |
[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>
-rw-r--r-- | arch/alpha/kernel/alpha_ksyms.c | 1 | ||||
-rw-r--r-- | arch/alpha/kernel/process.c | 6 | ||||
-rw-r--r-- | arch/alpha/kernel/smp.c | 14 | ||||
-rw-r--r-- | arch/alpha/kernel/sys_titan.c | 2 | ||||
-rw-r--r-- | include/asm-alpha/smp.h | 4 |
5 files changed, 9 insertions, 18 deletions
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c index c645c5e..2b245ad 100644 --- a/arch/alpha/kernel/alpha_ksyms.c +++ b/arch/alpha/kernel/alpha_ksyms.c @@ -182,7 +182,6 @@ EXPORT_SYMBOL(smp_num_cpus); EXPORT_SYMBOL(smp_call_function); EXPORT_SYMBOL(smp_call_function_on_cpu); EXPORT_SYMBOL(_atomic_dec_and_lock); -EXPORT_SYMBOL(cpu_present_mask); #endif /* CONFIG_SMP */ /* diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index 9924fd0..c760a83 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -94,7 +94,7 @@ common_shutdown_1(void *generic_ptr) if (cpuid != boot_cpuid) { flags |= 0x00040000UL; /* "remain halted" */ *pflags = flags; - clear_bit(cpuid, &cpu_present_mask); + cpu_clear(cpuid, cpu_present_map); 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_possible_map); - while (cpus_weight(cpu_possible_map)) + cpu_clear(boot_cpuid, cpu_present_map); + while (cpus_weight(cpu_present_map)) barrier(); #endif diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c index 1852554..4dc273e 100644 --- a/arch/alpha/kernel/smp.c +++ b/arch/alpha/kernel/smp.c @@ -68,7 +68,6 @@ enum ipi_message_type { static int smp_secondary_alive __initdata = 0; /* Which cpus ids came online. */ -cpumask_t cpu_present_mask; cpumask_t cpu_online_map; EXPORT_SYMBOL(cpu_online_map); @@ -439,7 +438,7 @@ setup_smp(void) if ((cpu->flags & 0x1cc) == 0x1cc) { smp_num_probed++; /* Assume here that "whami" == index */ - cpu_set(i, cpu_present_mask); + cpu_set(i, cpu_present_map); cpu->pal_revision = boot_cpu_palrev; } @@ -450,11 +449,10 @@ setup_smp(void) } } else { smp_num_probed = 1; - cpu_set(boot_cpuid, cpu_present_mask); } - printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_mask = %lx\n", - smp_num_probed, cpu_possible_map.bits[0]); + printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_map = %lx\n", + smp_num_probed, cpu_present_map.bits[0]); } /* @@ -473,7 +471,7 @@ 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_present_mask = cpumask_of_cpu(boot_cpuid); + cpu_present_map = cpumask_of_cpu(boot_cpuid); printk(KERN_INFO "SMP mode deactivated.\n"); return; } @@ -486,10 +484,6 @@ smp_prepare_cpus(unsigned int max_cpus) void __devinit smp_prepare_boot_cpu(void) { - /* - * Mark the boot cpu (current cpu) as online - */ - cpu_set(smp_processor_id(), cpu_online_map); } int __devinit diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c index 5f84417..2551fb4 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) register int bcpu = boot_cpuid; #ifdef CONFIG_SMP - cpumask_t cpm = cpu_present_mask; + cpumask_t cpm = cpu_present_map; volatile unsigned long *dim0, *dim1, *dim2, *dim3; unsigned long mask0, mask1, mask2, mask3, dummy; diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h index 9950706..e143210 100644 --- a/include/asm-alpha/smp.h +++ b/include/asm-alpha/smp.h @@ -45,10 +45,8 @@ extern struct cpuinfo_alpha cpu_data[NR_CPUS]; #define hard_smp_processor_id() __hard_smp_processor_id() #define raw_smp_processor_id() (current_thread_info()->cpu) -extern cpumask_t cpu_present_mask; -extern cpumask_t cpu_online_map; extern int smp_num_cpus; -#define cpu_possible_map cpu_present_mask +#define cpu_possible_map cpu_present_map int smp_call_function_on_cpu(void (*func) (void *info), void *info,int retry, int wait, cpumask_t cpu); |