1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index d57118da73ff..0b6293d94d96 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -869,7 +869,7 @@ static inline int copy_signal(unsigned long clone_flags, struct task_struct * ts
         sig->it_prof_incr = cputime_zero;
 
         sig->leader = 0;        /* session leadership doesn't inherit */
-        sig->tty_old_pgrp = 0;
+        sig->tty_old_pgrp = NULL;
 
         sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
         sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
@@ -1038,10 +1038,12 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         p->utime = cputime_zero;
         p->stime = cputime_zero;
         p->sched_time = 0;
+#ifdef CONFIG_TASK_XACCT
         p->rchar = 0;           /* I/O counter: bytes read */
         p->wchar = 0;           /* I/O counter: bytes written */
         p->syscr = 0;           /* I/O counter: read syscalls */
         p->syscw = 0;           /* I/O counter: write syscalls */
+#endif
         task_io_accounting_init(p);
         acct_clear_integrals(p);