x86/process: Re-export start_thread()

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@alum.mit.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Dmitry Safonov <dima@arista.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180819230854.7275-1-rian@alum.mit.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index f547f866e86c43b3154755f9584ec0d1bb2cc95a..ba48e77c8e9e442ed2f01940047551b58256a0f6 100644 (file)
--- 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, struct task_struct *next_p)
 
        return prev_p;
 }
+EXPORT_SYMBOL_GPL(start_thread);
 
 void set_personality_64bit(void)
 {