[PATCH 3.18 42/56] x86/process: Re-export start_thread()

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Rian Hunter <rian@xxxxxxxxxxxx>

commit dc76803e57cc86589c4efcb5362918f9b0c0436f upstream.

The consolidation of the start_thread() functions removed the export
unintentionally. This breaks binfmt handlers built as a module.

Add it back.

Fixes: e634d8fc792c ("x86-64: merge the standard and compat start_thread() functions")
Signed-off-by: Rian Hunter <rian@xxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov <bpetkov@xxxxxxx>
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: Joerg Roedel <jroedel@xxxxxxx>
Cc: Dmitry Safonov <dima@xxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20180819230854.7275-1-rian@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/x86/kernel/process_64.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -438,6 +438,7 @@ __switch_to(struct task_struct *prev_p,
 
 	return prev_p;
 }
+EXPORT_SYMBOL_GPL(start_thread);
 
 void set_personality_64bit(void)
 {