acct: eliminate compile warning
If ACCT_VERSION is not defined to 3, below warning appears:
CC kernel/acct.o
kernel/acct.c: In function `do_acct_process':
kernel/acct.c:475:24: warning: unused variable `ns' [-Wunused-variable]
[akpm@linux-foundation.org: retain the local for code size improvements
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/acct.c b/kernel/acct.c
index b4c667d..33738ef 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -472,7 +472,6 @@
acct_t ac;
unsigned long flim;
const struct cred *orig_cred;
- struct pid_namespace *ns = acct->ns;
struct file *file = acct->file;
/*
@@ -500,10 +499,15 @@
ac.ac_gid16 = ac.ac_gid;
#endif
#if ACCT_VERSION == 3
- ac.ac_pid = task_tgid_nr_ns(current, ns);
- rcu_read_lock();
- ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent), ns);
- rcu_read_unlock();
+ {
+ struct pid_namespace *ns = acct->ns;
+
+ ac.ac_pid = task_tgid_nr_ns(current, ns);
+ rcu_read_lock();
+ ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent),
+ ns);
+ rcu_read_unlock();
+ }
#endif
/*
* Get freeze protection. If the fs is frozen, just skip the write