uml: simplify helper stack handling

run_helper and run_helper_thread had arguments which were the same in all
callers.  run_helper's stack_out was always NULL and run_helper_thread's
stack_order was always 0.  These are now gone, and the constants folded
into the code.

Also fixed leaks of the helper stack in the AIO and SIGIO code.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c
index 5eeecf8917c3..1171790f742c 100644
--- a/arch/um/drivers/harddog_user.c
+++ b/arch/um/drivers/harddog_user.c
@@ -68,7 +68,7 @@ int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock)
                 args = pid_args;
         }
 
-        pid = run_helper(pre_exec, &data, args, NULL);
+        pid = run_helper(pre_exec, &data, args);
 
         os_close_file(out_fds[0]);
         os_close_file(in_fds[1]);