[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>
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 @@
#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);