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/net_user.c b/arch/um/drivers/net_user.c
index 3503cff867c3..6fa948ba969d 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -187,7 +187,7 @@ static int change_tramp(char **argv, char *output, int output_len)
         }
         pe_data.close_me = fds[0];
         pe_data.stdout = fds[1];
-        pid = run_helper(change_pre_exec, &pe_data, argv, NULL);
+        pid = run_helper(change_pre_exec, &pe_data, argv);
 
         if (pid > 0)    /* Avoid hang as we won't get data in failure case. */
                 read_output(fds[0], output, output_len);