From: Heiko Carstens <hca@linux.ibm.com>
Date: Mon, 5 Apr 2021 20:32:27 +0000 (+0200)
Subject: s390/setup: use memblock_free_late() to free old stack
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ad31a8c05196a3dc5283b193e9c74a72022d3c65;p=linux.git

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 60da976eee6f..72134f9f6ff5 100644
--- 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);