Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / um / kernel / skas / process.c

diff --git a/kernel/arch/um/kernel/skas/process.c b/kernel/arch/um/kernel/skas/process.c
new file mode 100644 (file)
index 0000000..527fa58
--- /dev/null
+++ b/kernel/arch/um/kernel/skas/process.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <as-layout.h>
+#include <kern.h>
+#include <os.h>
+#include <skas.h>
+
+extern void start_kernel(void);
+
+static int __init start_kernel_proc(void *unused)
+{
+       int pid;
+
+       block_signals();
+       pid = os_getpid();
+
+       cpu_tasks[0].pid = pid;
+       cpu_tasks[0].task = current;
+
+       start_kernel();
+       return 0;
+}
+
+extern int userspace_pid[];
+
+extern char cpu0_irqstack[];
+
+int __init start_uml(void)
+{
+       stack_protections((unsigned long) &cpu0_irqstack);
+       set_sigstack(cpu0_irqstack, THREAD_SIZE);
+
+       init_new_thread_signals();
+
+       init_task.thread.request.u.thread.proc = start_kernel_proc;
+       init_task.thread.request.u.thread.arg = NULL;
+       return start_idle_thread(task_stack_page(&init_task),
+                                &init_task.thread.switch_buf);
+}
+
+unsigned long current_stub_stack(void)
+{
+       if (current->mm == NULL)
+               return 0;
+
+       return current->mm->context.id.stack;
+}