From 50ba0232fd5312410f1b65247e774244f89a628e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 18 May 2024 20:50:36 +0200
Subject: Merging upstream version 6.8.9.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/s390/kernel/facility.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 arch/s390/kernel/facility.c

(limited to 'arch/s390/kernel/facility.c')

diff --git a/arch/s390/kernel/facility.c b/arch/s390/kernel/facility.c
new file mode 100644
index 0000000000..f02127219a
--- /dev/null
+++ b/arch/s390/kernel/facility.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2023
+ */
+
+#include <asm/facility.h>
+
+unsigned int stfle_size(void)
+{
+	static unsigned int size;
+	unsigned int r;
+	u64 dummy;
+
+	r = READ_ONCE(size);
+	if (!r) {
+		r = __stfle_asm(&dummy, 1) + 1;
+		WRITE_ONCE(size, r);
+	}
+	return r;
+}
+EXPORT_SYMBOL(stfle_size);
-- 
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