[PATCH] taskstats: kill ->taskstats_lock in favor of ->siglock

signal_struct is (mostly) protected by ->sighand->siglock, I think we don't
need ->taskstats_lock to protect ->stats.  This also allows us to simplify the
locking in fill_tgid().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Jay Lan <jlan@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 213326609bac..3da978eec791 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -830,7 +830,7 @@ static inline int copy_signal(unsigned long clone_flags, struct task_struct * ts
         if (clone_flags & CLONE_THREAD) {
                 atomic_inc(&current->signal->count);
                 atomic_inc(&current->signal->live);
-                taskstats_tgid_alloc(current->signal);
+                taskstats_tgid_alloc(current);
                 return 0;
         }
         sig = kmem_cache_alloc(signal_cachep, GFP_KERNEL);