[S390] smp: fix cpu_possible_map initialization
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Tue, 14 Apr 2009 13:36:25 +0000 (15:36 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 14 Apr 2009 13:37:26 +0000 (15:37 +0200)
commit88e012856d05a5d00ae80c691fb7aa5adda268d7
tree2f0fccb3ffa9eaa3c93ae81f6031c083228106c1
parent52db45c3c55a0fca53077dfd7b123e30cd210aad
[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>
arch/s390/kernel/smp.c