ptrace: cleanup arch_ptrace() on mn10300

Use new 'datap' variable in order to remove unnecessary castings.
Also remove checking @addr less than 0 because @addr is now unsigned.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/arch/mn10300/kernel/ptrace.c b/arch/mn10300/kernel/ptrace.c
index ec4b41439e99..5c0b07e61006 100644
--- a/arch/mn10300/kernel/ptrace.c
+++ b/arch/mn10300/kernel/ptrace.c
@@ -300,27 +300,26 @@ long arch_ptrace(struct task_struct *child, long request,
 {
         unsigned long tmp;
         int ret;
+        unsigned long __user *datap = (unsigned long __user *) data;
 
         switch (request) {
         /* read the word at location addr in the USER area. */
         case PTRACE_PEEKUSR:
                 ret = -EIO;
-                if ((addr & 3) || addr < 0 ||
-                    addr > sizeof(struct user) - 3)
+                if ((addr & 3) || addr > sizeof(struct user) - 3)
                         break;
 
                 tmp = 0;  /* Default return condition */
                 if (addr < NR_PTREGS << 2)
                         tmp = get_stack_long(child,
                                              ptrace_regid_to_frame[addr]);
-                ret = put_user(tmp, (unsigned long *) data);
+                ret = put_user(tmp, datap);
                 break;
 
                 /* write the word at location addr in the USER area */
         case PTRACE_POKEUSR:
                 ret = -EIO;
-                if ((addr & 3) || addr < 0 ||
-                    addr > sizeof(struct user) - 3)
+                if ((addr & 3) || addr > sizeof(struct user) - 3)
                         break;
 
                 ret = 0;
@@ -333,25 +332,25 @@ long arch_ptrace(struct task_struct *child, long request,
                 return copy_regset_to_user(child, &user_mn10300_native_view,
                                            REGSET_GENERAL,
                                            0, NR_PTREGS * sizeof(long),
-                                           (void __user *)data);
+                                           datap);
 
         case PTRACE_SETREGS:    /* Set all integer regs in the child. */
                 return copy_regset_from_user(child, &user_mn10300_native_view,
                                              REGSET_GENERAL,
                                              0, NR_PTREGS * sizeof(long),
-                                             (const void __user *)data);
+                                             datap);
 
         case PTRACE_GETFPREGS:  /* Get the child FPU state. */
                 return copy_regset_to_user(child, &user_mn10300_native_view,
                                            REGSET_FPU,
                                            0, sizeof(struct fpu_state_struct),
-                                           (void __user *)data);
+                                           datap);
 
         case PTRACE_SETFPREGS:  /* Set the child FPU state. */
                 return copy_regset_from_user(child, &user_mn10300_native_view,
                                              REGSET_FPU,
                                              0, sizeof(struct fpu_state_struct),
-                                             (const void __user *)data);
+                                             datap);
 
         default:
                 ret = ptrace_request(child, request, addr, data);