From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 lib/bust_spinlocks.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 lib/bust_spinlocks.c

(limited to 'lib/bust_spinlocks.c')

diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
new file mode 100644
index 00000000..f8e0e536
--- /dev/null
+++ b/lib/bust_spinlocks.c
@@ -0,0 +1,31 @@
+/*
+ * lib/bust_spinlocks.c
+ *
+ * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
+ *
+ * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
+ * and panic() information from reaching the user.
+ */
+
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/spinlock.h>
+#include <linux/tty.h>
+#include <linux/wait.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+
+
+void __attribute__((weak)) bust_spinlocks(int yes)
+{
+	if (yes) {
+		++oops_in_progress;
+	} else {
+#ifdef CONFIG_VT
+		unblank_screen();
+#endif
+		console_unblank();
+		if (--oops_in_progress == 0)
+			wake_up_klogd();
+	}
+}
-- 
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