diff options
Diffstat (limited to 'arch/c6x/kernel/process.c')
| -rw-r--r-- | arch/c6x/kernel/process.c | 25 |
1 files changed, 5 insertions, 20 deletions
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c index 2770d9a9a84..6434df476f7 100644 --- a/arch/c6x/kernel/process.c +++ b/arch/c6x/kernel/process.c @@ -112,22 +112,6 @@ void exit_thread(void) { } -SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs) -{ - unsigned long clone_flags; - unsigned long newsp; - - /* syscall puts clone_flags in A4 and usp in B4 */ - clone_flags = regs->orig_a4; - if (regs->b4) - newsp = regs->b4; - else - newsp = regs->sp; - - return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6, - (int __user *)regs->b6); -} - /* * Do necessary setup to start up a newly executed thread. */ @@ -155,13 +139,13 @@ void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp) */ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long ustk_size, - struct task_struct *p, struct pt_regs *regs) + struct task_struct *p) { struct pt_regs *childregs; childregs = task_pt_regs(p); - if (!regs) { + if (unlikely(p->flags & PF_KTHREAD)) { /* case of __kernel_thread: we return to supervisor space */ memset(childregs, 0, sizeof(struct pt_regs)); childregs->sp = (unsigned long)(childregs + 1); @@ -170,8 +154,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, childregs->a1 = ustk_size; /* argument */ } else { /* Otherwise use the given stack */ - *childregs = *regs; - childregs->sp = usp; + *childregs = *current_pt_regs(); + if (usp) + childregs->sp = usp; p->thread.pc = (unsigned long) ret_from_fork; } |