prctl: remove redunant assignment of "error" to zero

Just setting the "error" to error number is enough on failure and It
doesn't require to set "error" variable to zero in each switch case,
since it was already initialized with zero.  And also removed return 0
in switch case with break statement

Signed-off-by: Sasikantha babu <sasikanth.v19@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/sys.c b/kernel/sys.c
index 2d39a84cd8575e6295f666421cee01b41652b3b1..b04ae0390df35833613b5b3afb7b19c826ae6c94 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2015,7 +2015,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                break;
                        }
                        me->pdeath_signal = arg2;
-                       error = 0;
                        break;
                case PR_GET_PDEATHSIG:
                        error = put_user(me->pdeath_signal, (int __user *)arg2);
@@ -2029,7 +2028,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                break;
                        }
                        set_dumpable(me->mm, arg2);
-                       error = 0;
                        break;
 
                case PR_SET_UNALIGN:
@@ -2056,10 +2054,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                case PR_SET_TIMING:
                        if (arg2 != PR_TIMING_STATISTICAL)
                                error = -EINVAL;
-                       else
-                               error = 0;
                        break;
-
                case PR_SET_NAME:
                        comm[sizeof(me->comm)-1] = 0;
                        if (strncpy_from_user(comm, (char __user *)arg2,
@@ -2067,20 +2062,19 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                return -EFAULT;
                        set_task_comm(me, comm);
                        proc_comm_connector(me);
-                       return 0;
+                       break;
                case PR_GET_NAME:
                        get_task_comm(comm, me);
                        if (copy_to_user((char __user *)arg2, comm,
                                         sizeof(comm)))
                                return -EFAULT;
-                       return 0;
+                       break;
                case PR_GET_ENDIAN:
                        error = GET_ENDIAN(me, arg2);
                        break;
                case PR_SET_ENDIAN:
                        error = SET_ENDIAN(me, arg2);
                        break;
-
                case PR_GET_SECCOMP:
                        error = prctl_get_seccomp();
                        break;
@@ -2108,7 +2102,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                        current->default_timer_slack_ns;
                        else
                                current->timer_slack_ns = arg2;
-                       error = 0;
                        break;
                case PR_MCE_KILL:
                        if (arg4 | arg5)
@@ -2134,7 +2127,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                        default:
                                return -EINVAL;
                        }
-                       error = 0;
                        break;
                case PR_MCE_KILL_GET:
                        if (arg2 | arg3 | arg4 | arg5)
@@ -2153,7 +2145,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                        break;
                case PR_SET_CHILD_SUBREAPER:
                        me->signal->is_child_subreaper = !!arg2;
-                       error = 0;
                        break;
                case PR_GET_CHILD_SUBREAPER:
                        error = put_user(me->signal->is_child_subreaper,