4 files changed, 7 insertions, 25 deletions

diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index 90d7f2e8ead8..29185cad9fff 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -201,7 +201,7 @@ static int change_tramp(char **argv, char *output, int output_len)
         close(fds[1]);
 
         if (pid > 0)
-                CATCH_EINTR(err = waitpid(pid, NULL, 0));
+                helper_wait(pid, 0, "change_tramp");
         return pid;
 }
 
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 5f06204d6871..b8711e50da80 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -77,7 +77,7 @@ static int slip_tramp(char **argv, int fd)
 {
         struct slip_pre_exec_data pe_data;
         char *output;
-        int status, pid, fds[2], err, output_len;
+        int pid, fds[2], err, output_len;
 
         err = os_pipe(fds, 1, 0);
         if (err < 0) {
@@ -109,15 +109,7 @@ static int slip_tramp(char **argv, int fd)
         read_output(fds[0], output, output_len);
         printk("%s", output);
 
-        CATCH_EINTR(err = waitpid(pid, &status, 0));
-        if (err < 0)
-                err = errno;
-        else if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
-                printk(UM_KERN_ERR "'%s' didn't exit with status 0\n", argv[0]);
-                err = -EINVAL;
-        }
-        else err = 0;
-
+        err = helper_wait(pid, 0, argv[0]);
         close(fds[0]);
 
 out_free:
diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
index 1865089ff41a..89c1be225fda 100644
--- a/arch/um/drivers/slirp_user.c
+++ b/arch/um/drivers/slirp_user.c
@@ -79,7 +79,7 @@ out:
 static void slirp_close(int fd, void *data)
 {
         struct slirp_data *pri = data;
-        int status,err;
+        int err;
 
         close(fd);
         close(pri->slave);
@@ -98,18 +98,9 @@ static void slirp_close(int fd, void *data)
                        "(%d)\n", pri->pid, errno);
         }
 #endif
-
-        CATCH_EINTR(err = waitpid(pri->pid, &status, WNOHANG));
-        if (err < 0) {
-                printk(UM_KERN_ERR "slirp_close: waitpid returned %d\n", errno);
-                return;
-        }
-
-        if (err == 0) {
-                printk(UM_KERN_ERR "slirp_close: process %d has not exited\n",
-                       pri->pid);
+        err = helper_wait(pri->pid, 1, "slirp_close");
+        if (err < 0)
                 return;
-        }
 
         pri->pid = -1;
 }
diff --git a/arch/um/drivers/ubd_user.c b/arch/um/drivers/ubd_user.c
index 41d254bd38df..48fc7452bc1d 100644
--- a/arch/um/drivers/ubd_user.c
+++ b/arch/um/drivers/ubd_user.c
@@ -49,8 +49,7 @@ int start_io_thread(unsigned long sp, int *fd_out)
                 goto out_close;
         }
 
-        pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM | SIGCHLD,
-                    NULL);
+        pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
         if(pid < 0){
                 err = -errno;
                 printk("start_io_thread - clone failed : errno = %d\n", errno);