Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
  Blackfin: convert page/tlb to asm-generic
  Blackfin: convert types to asm-generic
  Blackfin: convert irq/process to asm-generic
  Blackfin: convert signal/mmap to asm-generic
  Blackfin: convert locking primitives to asm-generic
  Blackfin: convert termios to asm-generic
  Blackfin: convert simple headers to asm-generic
  Blackfin: convert socket/poll to asm-generic
  Blackfin: convert user/elf to asm-generic
  Blackfin: convert shm/sysv/ipc to asm-generic
  Blackfin: convert asm/ioctls.h to asm-generic/ioctls.h
  Blackfin: only build irqpanic.c when needed
  Blackfin: pull in asm/io.h in ksyms for prototypes
  Blackfin: use common test_bit() rather than __test_bit()

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 30d0843ed70..3e1d86e456f 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -160,6 +160,29 @@ pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
 }
 EXPORT_SYMBOL(kernel_thread);
 
+/*
+ * Do necessary setup to start up a newly executed thread.
+ *
+ * pass the data segment into user programs if it exists,
+ * it can't hurt anything as far as I can tell
+ */
+void start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+{
+	set_fs(USER_DS);
+	regs->pc = new_ip;
+	if (current->mm)
+		regs->p5 = current->mm->start_data;
+#ifdef CONFIG_SMP
+	task_thread_info(current)->l1_task_info.stack_start =
+		(void *)current->mm->context.stack_start;
+	task_thread_info(current)->l1_task_info.lowest_sp = (void *)new_sp;
+	memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info,
+	       sizeof(*L1_SCRATCH_TASK_INFO));
+#endif
+	wrusp(new_sp);
+}
+EXPORT_SYMBOL_GPL(start_thread);
+
 void flush_thread(void)
 {
 }