[IA64] convert sys_ptrace to arch_ptrace

Convert sys_ptrace() to arch_ptrace().

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 3 insertions, 39 deletions

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index e82fe296c2c0..1dfff5a8f365 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1470,46 +1470,13 @@ ptrace_disable (struct task_struct *child)
         child_psr->tb = 0;
 }
 
-asmlinkage long
-sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
+long
+arch_ptrace (struct task_struct *child, long request, long addr, long data)
 {
         struct pt_regs *pt;
-        struct task_struct *child;
         struct switch_stack *sw;
         long ret;
 
-        lock_kernel();
-        ret = -EPERM;
-        if (request == PTRACE_TRACEME) {
-                ret = ptrace_traceme();
-                goto out;
-        }
-
-        ret = -ESRCH;
-        read_lock(&tasklist_lock);
-        {
-                child = find_task_by_pid(pid);
-                if (child)
-                        get_task_struct(child);
-        }
-        read_unlock(&tasklist_lock);
-        if (!child)
-                goto out;
-        ret = -EPERM;
-        if (pid == 1)           /* no messing around with init! */
-                goto out_tsk;
-
-        if (request == PTRACE_ATTACH) {
-                ret = ptrace_attach(child);
-                if (!ret)
-                        arch_ptrace_attach(child);
-                goto out_tsk;
-        }
-
-        ret = ptrace_check_attach(child, request == PTRACE_KILL);
-        if (ret < 0)
-                goto out_tsk;
-
         pt = task_pt_regs(child);
         sw = (struct switch_stack *) (child->thread.ksp + 16);
 
@@ -1594,7 +1561,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
                  */
                 if (child->exit_state == EXIT_ZOMBIE)
                         /* already dead */
-                        goto out_tsk;
+                        return 0;
                 child->exit_code = SIGKILL;
 
                 ptrace_disable(child);
@@ -1643,9 +1610,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
                 goto out_tsk;
         }
   out_tsk:
-        put_task_struct(child);
-  out:
-        unlock_kernel();
         return ret;
 }