h8300: generic kernel_execve()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/h8300/Kconfig

@@ -9,6 +9,7 @@ config H8300
 	select GENERIC_CPU_DEVICES
 	select MODULES_USE_ELF_RELA
 	select GENERIC_KERNEL_THREAD
+	select GENERIC_KERNEL_EXECVE
 
 config SYMBOL_PREFIX
 	string

arch/h8300/kernel/entry.S

@@ -337,8 +337,7 @@ SYMBOL_NAME_LABEL(ret_from_kernel_thread)
 	mov.l	@(LER4:16,sp),er0
 	mov.l	@(LER5:16,sp),er1
 	jsr	@er1
-	sub.l	@er0,@er0
-	jsr	@SYMBOL_NAME(sys_exit)
+	jmp	@SYMBOL_NAME(ret_from_exception)
 
 SYMBOL_NAME_LABEL(resume)
 	/*

arch/h8300/kernel/sys_h8300.c

@@ -46,29 +46,3 @@ asmlinkage void syscall_print(void *dummy,...)
                ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
 }
 #endif
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-asmlinkage
-int kernel_execve(const char *filename,
-		  const char *const argv[],
-		  const char *const envp[])
-{
-	register long res __asm__("er0");
-	register const char *const *_c __asm__("er3") = envp;
-	register const char *const *_b __asm__("er2") = argv;
-	register const char * _a __asm__("er1") = filename;
-	__asm__ __volatile__ ("mov.l %1,er0\n\t"
-			"trapa	#0\n\t"
-			: "=r" (res)
-			: "g" (__NR_execve),
-			  "g" (_a),
-			  "g" (_b),
-			  "g" (_c)
-			: "cc", "memory");
-	return res;
-}
-
-