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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>
This commit is contained in:
Al Viro 2012-10-17 02:26:48 -04:00
parent c4144670fd
commit 8cddebd767
1 changed files with 2 additions and 6 deletions
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8
arch/um/kernel/syscall.c
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@ -16,23 +16,19 @@
long sys_fork(void) 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); &current->thread.regs, 0, NULL, NULL);
} }
long sys_vfork(void) long sys_vfork(void)
{ {
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0,
UPT_SP(&current->thread.regs.regs),
&current->thread.regs, 0, NULL, NULL); &current->thread.regs, 0, NULL, NULL);
} }
long sys_clone(unsigned long clone_flags, unsigned long newsp, long sys_clone(unsigned long clone_flags, unsigned long newsp,
void __user *parent_tid, void __user *child_tid) 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, return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
child_tid); child_tid);
} }