kdbus_bus_unref() always returns NULL and none of its callers use the
return value, so make it return void.
Signed-off-by: Tobias Klauser <[email protected]>
---
ipc/kdbus/bus.c | 5 +----
ipc/kdbus/bus.h | 2 +-
2 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/ipc/kdbus/bus.c b/ipc/kdbus/bus.c
index 9d0679e..dce7b08 100644
--- a/ipc/kdbus/bus.c
+++ b/ipc/kdbus/bus.c
@@ -202,14 +202,11 @@ struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus)
*
* Release a reference. If the reference count drops to 0, the bus will be
* freed.
- *
- * Return: NULL
*/
-struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus)
+void kdbus_bus_unref(struct kdbus_bus *bus)
{
if (bus)
kdbus_node_unref(&bus->node);
- return NULL;
}
/**
diff --git a/ipc/kdbus/bus.h b/ipc/kdbus/bus.h
index 5bea5ef..266af60 100644
--- a/ipc/kdbus/bus.h
+++ b/ipc/kdbus/bus.h
@@ -84,7 +84,7 @@ struct kdbus_bus {
};
struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus);
-struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus);
+void kdbus_bus_unref(struct kdbus_bus *bus);
struct kdbus_conn *kdbus_bus_find_conn_by_id(struct kdbus_bus *bus, u64 id);
void kdbus_bus_broadcast(struct kdbus_bus *bus,
--
2.2.2
Hi
On Wed, Apr 22, 2015 at 1:50 PM, Tobias Klauser <[email protected]> wrote:
> kdbus_bus_unref() always returns NULL and none of its callers use the
> return value, so make it return void.
>
> Signed-off-by: Tobias Klauser <[email protected]>
All our destructors return NULL, which allows simple assignment during
destruction:
foo->bus = kdbus_bus_unref(foo->bus);
And our destructors ignore NULL, so no reason to conditionalize the
call to unref(). This simplifies our error-paths a lot, and I'd like
to keep it that way.
I'd prefer to stay uniform across our code-base and keep returning
NULL. It's neither a fast-path, nor do return values require any
memory writes (usually register passing, iirc).
Thanks
David
> ---
> ipc/kdbus/bus.c | 5 +----
> ipc/kdbus/bus.h | 2 +-
> 2 files changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/ipc/kdbus/bus.c b/ipc/kdbus/bus.c
> index 9d0679e..dce7b08 100644
> --- a/ipc/kdbus/bus.c
> +++ b/ipc/kdbus/bus.c
> @@ -202,14 +202,11 @@ struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus)
> *
> * Release a reference. If the reference count drops to 0, the bus will be
> * freed.
> - *
> - * Return: NULL
> */
> -struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus)
> +void kdbus_bus_unref(struct kdbus_bus *bus)
> {
> if (bus)
> kdbus_node_unref(&bus->node);
> - return NULL;
> }
>
> /**
> diff --git a/ipc/kdbus/bus.h b/ipc/kdbus/bus.h
> index 5bea5ef..266af60 100644
> --- a/ipc/kdbus/bus.h
> +++ b/ipc/kdbus/bus.h
> @@ -84,7 +84,7 @@ struct kdbus_bus {
> };
>
> struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus);
> -struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus);
> +void kdbus_bus_unref(struct kdbus_bus *bus);
>
> struct kdbus_conn *kdbus_bus_find_conn_by_id(struct kdbus_bus *bus, u64 id);
> void kdbus_bus_broadcast(struct kdbus_bus *bus,
> --
> 2.2.2
>
>
On 2015-04-22 at 14:01:05 +0200, David Herrmann <[email protected]> wrote:
> Hi
>
> On Wed, Apr 22, 2015 at 1:50 PM, Tobias Klauser <[email protected]> wrote:
> > kdbus_bus_unref() always returns NULL and none of its callers use the
> > return value, so make it return void.
> >
> > Signed-off-by: Tobias Klauser <[email protected]>
>
> All our destructors return NULL, which allows simple assignment during
> destruction:
> foo->bus = kdbus_bus_unref(foo->bus);
> And our destructors ignore NULL, so no reason to conditionalize the
> call to unref(). This simplifies our error-paths a lot, and I'd like
> to keep it that way.
Thanks for the explanation. I didn't consider this - and didn't even
look at the other *_unref() for that matter :(