[PATCH] ipc: replace kmalloc and memset in get_undo_list with kzalloc

Simplify get_undo_list() by dropping the unnecessary cast, removing the
size variable, and switching to kzalloc() instead of a kmalloc() followed
by a memset().

This cleanup was split then modified from Jes Sorenson's Task Notifiers
patches.

Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/ipc/sem.c b/ipc/sem.c
index 69edeb1..0dafcc4 100644 (file)
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1003,15 +1003,12 @@ static inline void unlock_semundo(void)
 static inline int get_undo_list(struct sem_undo_list **undo_listp)
 {
        struct sem_undo_list *undo_list;
-       int size;
 
        undo_list = current->sysvsem.undo_list;
        if (!undo_list) {
-               size = sizeof(struct sem_undo_list);
-               undo_list = (struct sem_undo_list *) kmalloc(size, GFP_KERNEL);
+               undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL);
                if (undo_list == NULL)
                        return -ENOMEM;
-               memset(undo_list, 0, size);
                spin_lock_init(&undo_list->lock);
                atomic_set(&undo_list->refcnt, 1);
                current->sysvsem.undo_list = undo_list;