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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-04-14 15:36:25 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-04-14 15:37:26 +0200
commit88e012856d05a5d00ae80c691fb7aa5adda268d7 (patch)
tree2f0fccb3ffa9eaa3c93ae81f6031c083228106c1 /arch/s390
parent52db45c3c55a0fca53077dfd7b123e30cd210aad (diff)
downloadop-kernel-dev-88e012856d05a5d00ae80c691fb7aa5adda268d7.zip
op-kernel-dev-88e012856d05a5d00ae80c691fb7aa5adda268d7.tar.gz
[S390] smp: fix cpu_possible_map initialization
The cpu_possible_map by default is initialized with all ones in s390. If the kernel paramert possible_cpus=<x> is passed the cpu_possible_map is supposed to have x bits set. However the current code just sets the x bits without clearing the NR_CPUS bits that were already set. So we end up with an unchanged map that has all bits set. To fix this just clear the map before setting any new bits. This broke with def6cfb70bab83c0094bc0cedd27c4eda563043e "[S390] cpumask: Use accessors code." Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/smp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 7966302..a985a3b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -591,7 +591,8 @@ static int __init setup_possible_cpus(char *s)
int pcpus, cpu;
pcpus = simple_strtoul(s, NULL, 0);
- for (cpu = 0; cpu < pcpus && cpu < nr_cpu_ids; cpu++)
+ init_cpu_possible(cpumask_of(0));
+ for (cpu = 1; cpu < pcpus && cpu < nr_cpu_ids; cpu++)
set_cpu_possible(cpu, true);
return 0;
}
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