1 files changed, 28 insertions, 3 deletions

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 8fde242596f9..ee98eeb65e85 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -7,6 +7,7 @@
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  * Copyright (C) 2001 MIPS Technologies, Inc.
  */
+#include <linux/config.h>
 #include <linux/a.out.h>
 #include <linux/errno.h>
 #include <linux/linkage.h>
@@ -176,14 +177,28 @@ _sys_clone(nabi_no_regargs struct pt_regs regs)
 {
         unsigned long clone_flags;
         unsigned long newsp;
-        int *parent_tidptr, *child_tidptr;
+        int __user *parent_tidptr, *child_tidptr;
 
         clone_flags = regs.regs[4];
         newsp = regs.regs[5];
         if (!newsp)
                 newsp = regs.regs[29];
-        parent_tidptr = (int *) regs.regs[6];
-        child_tidptr = (int *) regs.regs[7];
+        parent_tidptr = (int __user *) regs.regs[6];
+#ifdef CONFIG_32BIT
+        /* We need to fetch the fifth argument off the stack.  */
+        child_tidptr = NULL;
+        if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
+                int __user *__user *usp = (int __user *__user *) regs.regs[29];
+                if (regs.regs[2] == __NR_syscall) {
+                        if (get_user (child_tidptr, &usp[5]))
+                                return -EFAULT;
+                }
+                else if (get_user (child_tidptr, &usp[4]))
+                        return -EFAULT;
+        }
+#else
+        child_tidptr = (int __user *) regs.regs[8];
+#endif
         return do_fork(clone_flags, newsp, &regs, 0,
                        parent_tidptr, child_tidptr);
 }
@@ -245,6 +260,16 @@ asmlinkage int sys_olduname(struct oldold_utsname * name)
         return error;
 }
 
+void sys_set_thread_area(unsigned long addr)
+{
+        struct thread_info *ti = current->thread_info;
+
+        ti->tp_value = addr;
+
+        /* If some future MIPS implementation has this register in hardware,
+         * we will need to update it here (and in context switches).  */
+}
+
 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
 {
         int     tmp, len;