Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
new file mode 100644
index 000000000..8be59f84e
--- /dev/null
+++ b/lib/bust_spinlocks.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 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();
+        }
+}