powerpc: Replace mem_init_done with slab_is_available()
We have a powerpc specific global called mem_init_done which is "set on
boot once kmalloc can be called".
But that's not *quite* true. We set it at the bottom of mem_init(), and
rely on the fact that mm_init() calls kmem_cache_init() immediately
after that, and nothing is running in parallel.
So replace it with the generic and 100% correct slab_is_available().
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/lib/alloc.c b/arch/powerpc/lib/alloc.c
index 4a6c2cf..60b0b3f 100644
--- a/arch/powerpc/lib/alloc.c
+++ b/arch/powerpc/lib/alloc.c
@@ -10,7 +10,7 @@
{
void *p;
- if (mem_init_done)
+ if (slab_is_available())
p = kzalloc(size, mask);
else {
p = memblock_virt_alloc(size, 0);