um: take cleaning singlestep to start_thread()

... assuming it's needed to be done at all

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

diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 6cade9366364d03f2fd58e2cee85336ffdea56e5..4cab0c78684b4035af6a0955a68f86a36f80195c 100644 (file)
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -41,32 +41,18 @@ void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
 {
        PT_REGS_IP(regs) = eip;
        PT_REGS_SP(regs) = esp;
-}
-EXPORT_SYMBOL(start_thread);
-
-static long execve1(const char *file,
-                   const char __user *const __user *argv,
-                   const char __user *const __user *env)
-{
-       long error;
-
-       error = do_execve(file, argv, env, &current->thread.regs);
-       if (error == 0) {
-               task_lock(current);
-               current->ptrace &= ~PT_DTRACE;
+       current->ptrace &= ~PT_DTRACE;
 #ifdef SUBARCH_EXECVE1
-               SUBARCH_EXECVE1(&current->thread.regs.regs);
+       SUBARCH_EXECVE1(regs->regs);
 #endif
-               task_unlock(current);
-       }
-       return error;
 }
+EXPORT_SYMBOL(start_thread);
 
 long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
 {
        long err;
 
-       err = execve1(file, argv, env);
+       err = do_execve(file, argv, env, &current->thread.regs);
        if (!err)
                UML_LONGJMP(current->thread.exec_buf, 1);
        return err;
@@ -81,7 +67,7 @@ long sys_execve(const char __user *file, const char __user *const __user *argv,
        filename = getname(file);
        error = PTR_ERR(filename);
        if (IS_ERR(filename)) goto out;
-       error = execve1(filename, argv, env);
+       error = do_execve(filename, argv, env, &current->thread.regs);
        putname(filename);
  out:
        return error;