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[PATCH] alpha: SMP IRQ routing fix

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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>
This commit is contained in:
Ivan Kokshaysky
2006-06-04 02:51:34 -07:00
committed by Linus Torvalds
parent ba0c19ed6a
commit c7d2d28b98
5 changed files with 9 additions and 18 deletions
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include/asm-alpha/smp.h
+1 -3
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@@ -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);