diff options
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index d6e195e8cd4c..5a23b69f8129 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -115,6 +115,14 @@ static struct slb_shadow * __init init_slb_shadow(int cpu) { struct slb_shadow *s = &slb_shadow[cpu]; + /* + * When we come through here to initialise boot_paca, the slb_shadow + * buffers are not allocated yet. That's OK, we'll get one later in + * boot, but make sure we don't corrupt memory at 0. + */ + if (!slb_shadow) + return NULL; + s->persistent = cpu_to_be32(SLB_NUM_BOLTED); s->buffer_length = cpu_to_be32(sizeof(*s)); |