From f0a1bf0859ffa059f9009d6a17e8d46241fb2161 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Thu, 25 Oct 2012 11:10:51 +0400
Subject: xtensa: switch to generic kernel_execve()

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 9525b70..0d1f36a 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -14,6 +14,7 @@ config XTENSA
 	select MODULES_USE_ELF_RELA
 	select GENERIC_PCI_IOMAP
 	select GENERIC_KERNEL_THREAD
+	select GENERIC_KERNEL_EXECVE
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	help
 	  Xtensa processors are 32-bit RISC machines designed by Tensilica
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index d4ec138..90bfc1d 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1833,22 +1833,6 @@ ENTRY(system_call)
 
 
 /*
- * Do a system call from kernel instead of calling sys_execve, so we end up
- * with proper pt_regs.
- *
- * int kernel_execve(const char *fname, char *const argv[], charg *const envp[])
- * a2                        a2               a3                  a4
- */
-
-ENTRY(kernel_execve)
-	entry	a1, 16
-	mov	a6, a2			# arg0 is in a6
-	movi	a2, __NR_execve
-	syscall
-
-	retw
-
-/*
  * Task switch.
  *
  * struct task*  _switch_to (struct task* prev, struct task* next)
@@ -1940,6 +1924,6 @@ ENTRY(ret_from_kernel_thread)
 	call4	schedule_tail
 	mov	a6, a3
 	callx4	a2
-	call4	do_exit
+	j	common_exception_return
 
 ENDPROC(ret_from_kernel_thread)
-- 
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