ptrace: change signature of sys_ptrace() and friends

Since userspace API of ptrace syscall defines @addr and @data as void
pointers, it would be more appropriate to define them as unsigned long in
kernel.  Therefore related functions are changed also.

'unsigned long' is typically used in other places in kernel as an opaque
data type and that using this helps cleaning up a lot of warnings from
sparse.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 4272521e29e..67a4cd77c35 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -108,7 +108,8 @@ extern int ptrace_attach(struct task_struct *tsk);
 extern int ptrace_detach(struct task_struct *, unsigned int);
 extern void ptrace_disable(struct task_struct *);
 extern int ptrace_check_attach(struct task_struct *task, int kill);
-extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
+extern int ptrace_request(struct task_struct *child, long request,
+                          unsigned long addr, unsigned long data);
 extern void ptrace_notify(int exit_code);
 extern void __ptrace_link(struct task_struct *child,
                           struct task_struct *new_parent);
@@ -132,8 +133,10 @@ static inline void ptrace_unlink(struct task_struct *child)
                 __ptrace_unlink(child);
 }
 
-int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data);
-int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data);
+int generic_ptrace_peekdata(struct task_struct *tsk, unsigned long addr,
+                            unsigned long data);
+int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr,
+                            unsigned long data);
 
 /**
  * task_ptrace - return %PT_* flags that apply to a task