powerpc/64s/radix: Do not allocate SLB shadow structures
These are unused in radix mode.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 8d63627..70f073d 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -99,18 +99,27 @@ static inline void free_lppacas(void) { }
* If you make the number of persistent SLB entries dynamic, please also
* update PR KVM to flush and restore them accordingly.
*/
-static struct slb_shadow *slb_shadow;
+static struct slb_shadow * __initdata slb_shadow;
static void __init allocate_slb_shadows(int nr_cpus, int limit)
{
int size = PAGE_ALIGN(sizeof(struct slb_shadow) * nr_cpus);
+
+ if (early_radix_enabled())
+ return;
+
slb_shadow = __va(memblock_alloc_base(size, PAGE_SIZE, limit));
memset(slb_shadow, 0, size);
}
static struct slb_shadow * __init init_slb_shadow(int cpu)
{
- struct slb_shadow *s = &slb_shadow[cpu];
+ struct slb_shadow *s;
+
+ if (early_radix_enabled())
+ return NULL;
+
+ s = &slb_shadow[cpu];
/*
* When we come through here to initialise boot_paca, the slb_shadow
