lib/idr.c: use RCU_INIT_POINTER(x, NULL)
Replace rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)
The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structure. And in the
case of the NULL pointer, there is no structure to initialize.
So, rcu_assign_pointer(p, NULL) can be safely converted to
RCU_INIT_POINTER(p, NULL)
Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/idr.c b/lib/idr.c
index ba2df39..2642fa8 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -533,7 +533,7 @@
n = id & IDR_MASK;
if (likely(p != NULL && test_bit(n, p->bitmap))) {
__clear_bit(n, p->bitmap);
- rcu_assign_pointer(p->ary[n], NULL);
+ RCU_INIT_POINTER(p->ary[n], NULL);
to_free = NULL;
while(*paa && ! --((**paa)->count)){
if (to_free)
@@ -602,7 +602,7 @@
n = idp->layers * IDR_BITS;
p = idp->top;
- rcu_assign_pointer(idp->top, NULL);
+ RCU_INIT_POINTER(idp->top, NULL);
max = idr_max(idp->layers);
id = 0;
