Initial file dump from open source releaseHEADmaster

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/tty/sprdrq.c b/drivers/tty/sprdrq.c
new file mode 100644
index 00000000..b07da2a3
--- /dev/null
+++ b/drivers/tty/sprdrq.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2012 Spreadtrum Communications Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/sysrq.h>
+#include <linux/nmi.h>
+
+void show_state_group(unsigned long state_filter)
+{
+	struct task_struct *p, *g;
+
+	rcu_read_lock();
+	do_each_thread(g, p) {
+		touch_nmi_watchdog();
+		if (p->state & state_filter){
+			printk(KERN_INFO "\nGroup: %s - %d\n", g->comm, g->pid);
+			/* dump all threads stack in same group */
+			p = g;
+			do{
+				sched_show_task(p);
+			}while_each_thread(g, p);
+			break;
+		}
+	} while_each_thread(g, p);
+	rcu_read_unlock();
+}
+
+static void sysrq_handle_show_blocked_group(int key)
+{
+	show_state_group(TASK_UNINTERRUPTIBLE);
+}
+
+struct sysrq_key_op sysrq_show_blocked_group_op = {
+	.handler	= sysrq_handle_show_blocked_group,
+	.help_msg	= "show-blocked-group(x)",
+	.action_msg	= "Show Blocked Group State",
+	.enable_mask	= SYSRQ_ENABLE_DUMP,
+};
+