avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappers

[karo-tx-linux.git] / arch / avr32 / kernel / process.c

diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index 09b894d96d6e21aefadab9283a480e0b724f01e9..03d7aa4a4bc999a4cac60a21ef0c1d84c230c99b 100644 (file)
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c
@@ -299,11 +299,11 @@ asmlinkage void syscall_return(void);
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
                unsigned long arg,
-               struct task_struct *p, struct pt_regs *regs)
+               struct task_struct *p, struct pt_regs *unused)
 {
        struct pt_regs *childregs = task_pt_regs(p);
 
-       if (unlikely(!regs)) {
+       if (unlikely(p->flags & PF_KTHREAD)) {
                memset(childregs, 0, sizeof(struct pt_regs));
                p->thread.cpu_context.r0 = arg;
                p->thread.cpu_context.r1 = usp; /* fn */
@@ -311,8 +311,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
                p->thread.cpu_context.pc = (unsigned long)ret_from_kernel_thread;
                childregs->sr = MODE_SUPERVISOR;
        } else {
-               *childregs = *regs;
-               childregs->sp = usp;
+               *childregs = *current_pt_regs();
+               if (usp)
+                       childregs->sp = usp;
                childregs->r12 = 0; /* Set return value for child */
                p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
        }
@@ -327,28 +328,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
        return 0;
 }
 
-/* r12-r8 are dummy parameters to force the compiler to use the stack */
-asmlinkage int sys_fork(struct pt_regs *regs)
-{
-       return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
-               void __user *parent_tidptr, void __user *child_tidptr,
-               struct pt_regs *regs)
-{
-       if (!newsp)
-               newsp = regs->sp;
-       return do_fork(clone_flags, newsp, regs, 0, parent_tidptr,
-                       child_tidptr);
-}
-
-asmlinkage int sys_vfork(struct pt_regs *regs)
-{
-       return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs,
-                      0, NULL, NULL);
-}
-
 /*
  * This function is supposed to answer the question "who called
  * schedule()?"