trim task_work: get rid of hlist

layout based on Oleg's suggestion; single-linked list,
task->task_works points to the last element, forward pointer
from said last element points to head.  I'd still prefer
much more regular scheme with two pointers in task_work,
but...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 6a4d82bedb03..1e98b5530425 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -192,7 +192,7 @@ static inline void tracehook_notify_resume(struct pt_regs *regs)
          * hlist_add_head(task->task_works);
          */
         smp_mb__after_clear_bit();
-        if (unlikely(!hlist_empty(&current->task_works)))
+        if (unlikely(current->task_works))
                 task_work_run();
 }