linux-kernel - [PATCH 4.4 56/80] x86/process: Re-export start

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Message-Id: <20180903164936.390344046@linuxfoundation.org>
Date:   Mon,  3 Sep 2018 18:49:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Rian Hunter <rian@...m.mit.edu>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bpetkov@...e.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Joerg Roedel <jroedel@...e.de>,
        Dmitry Safonov <dima@...sta.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: [PATCH 4.4 56/80] x86/process: Re-export start_thread()

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

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

From: Rian Hunter <rian@...m.mit.edu>

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@...m.mit.edu>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bpetkov@...e.de>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>
Cc: Joerg Roedel <jroedel@...e.de>
Cc: Dmitry Safonov <dima@...sta.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: stable@...r.kernel.org
Link: https://lkml.kernel.org/r/20180819230854.7275-1-rian@alum.mit.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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
@@ -250,6 +250,7 @@ start_thread(struct pt_regs *regs, unsig
 	start_thread_common(regs, new_ip, new_sp,
 			    __USER_CS, __USER_DS, 0);
 }
+EXPORT_SYMBOL_GPL(start_thread);

 #ifdef CONFIG_COMPAT
 void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp)