[PATCH 3/3] percpu: fix percpu accessors to potentially !cpu_possible() cpus: x86 voyager

[Rusty Russell]

Impact: CPU iterator bugfixes

Percpu areas are only allocated for possible cpus.  In general, you
shouldn't access random cpu's percpu areas.

Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Mike Travis <travis@xxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
---
 arch/x86/mach-voyager/voyager_smp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- test-compile.orig/arch/x86/mach-voyager/voyager_smp.c
+++ test-compile/arch/x86/mach-voyager/voyager_smp.c
@@ -1223,7 +1223,7 @@ int setup_profiling_timer(unsigned int m
 	 * new values until the next timer interrupt in which they do process
 	 * accounting.
 	 */
-	for (i = 0; i < NR_CPUS; ++i)
+	for_each_possible_cpu(i)
 		per_cpu(prof_multiplier, i) = multiplier;
 
 	return 0;


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