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>

1 files changed, 5 insertions, 19 deletions

diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 6cade9366364..4cab0c78684b 100644
--- 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;