x86: compat_sys_ptrace

This adds a generic definition of compat_sys_ptrace that calls
compat_arch_ptrace, parallel to sys_ptrace/arch_ptrace.  Some
machines needing this already define a function by that name.
The new generic function is defined only on machines that
put #define __ARCH_WANT_COMPAT_SYS_PTRACE into asm/ptrace.h.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/compat.h b/include/linux/compat.h
index a907fbede6c3..d38655f2be70 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -247,6 +247,13 @@ extern int compat_ptrace_request(struct task_struct *child,
                                  compat_long_t request,
                                  compat_ulong_t addr, compat_ulong_t data);
 
+#ifdef __ARCH_WANT_COMPAT_SYS_PTRACE
+extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+                               compat_ulong_t addr, compat_ulong_t data);
+asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
+                                  compat_long_t addr, compat_long_t data);
+#endif  /* __ARCH_WANT_COMPAT_SYS_PTRACE */
+
 /*
  * epoll (fs/eventpoll.c) compat bits follow ...
  */