um: don't bother with passing sp to do_fork() for fork(2)/vfork(2)

copy_thread() on um will do the right thing when getting 0 for sp...

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

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index a81f3705e90f..3a875226c8ef 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -16,23 +16,19 @@
 
 long sys_fork(void)
 {
-        return do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
+        return do_fork(SIGCHLD, 0,
                       &current->thread.regs, 0, NULL, NULL);
 }
 
 long sys_vfork(void)
 {
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
-                      UPT_SP(&current->thread.regs.regs),
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0,
                       &current->thread.regs, 0, NULL, NULL);
 }
 
 long sys_clone(unsigned long clone_flags, unsigned long newsp,
                void __user *parent_tid, void __user *child_tid)
 {
-        if (!newsp)
-                newsp = UPT_SP(&current->thread.regs.regs);
-
         return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
                       child_tid);
 }