s390/setup: use memblock_free_late() to free old stack

Use memblock_free_late() to free the old machine check stack to the
buddy allocator instead of leaking it.

Fixes: b61b1595124a ("s390: add stack for machine check handler")
Cc: Vasily Gorbik <gor@linux.ibm.com>
Acked-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 60da976eee6ff4b61d7a7ddf977732035a5fba42..72134f9f6ff5274c90bffe5e37ff146ac00b46e5 100644 (file)
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -354,7 +354,7 @@ static int __init stack_realloc(void)
        if (!new)
                panic("Couldn't allocate machine check stack");
        WRITE_ONCE(S390_lowcore.mcck_stack, new + STACK_INIT_OFFSET);
-       memblock_free(old, THREAD_SIZE);
+       memblock_free_late(old, THREAD_SIZE);
        return 0;
 }
 early_initcall(stack_realloc);