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um: kill thread->forking

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we only use that to tell copy_thread() done by syscall from that
done by kernel_thread().  However, it's easier to do simply by
checking PF_KTHREAD in thread flags.

Merge sys_clone() guts for 32bit and 64bit, while we are at it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-09-20 09:28:25 -04:00
committed by Richard Weinberger
parent f9a38eace4
commit d2ce4e92fa
7 changed files with 29 additions and 66 deletions
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8
arch/um/kernel/process.c
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@@ -181,11 +181,12 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
struct pt_regs *regs)
{
void (*handler)(void);
int kthread = current->flags & PF_KTHREAD;
int ret = 0;
p->thread = (struct thread_struct) INIT_THREAD;
if (current->thread.forking) {
if (!kthread) {
memcpy(&p->thread.regs.regs, &regs->regs,
sizeof(p->thread.regs.regs));
PT_REGS_SET_SYSCALL_RETURN(&p->thread.regs, 0);
@@ -195,8 +196,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
handler = fork_handler;
arch_copy_thread(&current->thread.arch, &p->thread.arch);
}
else {
} else {
get_safe_registers(p->thread.regs.regs.gp, p->thread.regs.regs.fp);
p->thread.request.u.thread = current->thread.request.u.thread;
handler = new_thread_handler;
@@ -204,7 +204,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
new_thread(task_stack_page(p), &p->thread.switch_buf, handler);
if (current->thread.forking) {
if (!kthread) {
clear_flushed_tls(p);
/*