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authorPeter Zijlstra <peterz@infradead.org>2016-11-14 17:29:48 +0100
committerIngo Molnar <mingo@kernel.org>2017-01-14 11:37:18 +0100
commit2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e (patch)
tree4ccb975ac9142887b4e7e7bf1c0cca5c53d4cf99 /drivers/block/rbd.c
parent1e24edca0557dba6486d39d3c24c288475432bcf (diff)
locking/atomic, kref: Add kref_read()
Since we need to change the implementation, stop exposing internals. Provide kref_read() to read the current reference count; typically used for debug messages. Kills two anti-patterns: atomic_read(&kref->refcount) kref->refcount.counter Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/block/rbd.c')
-rw-r--r--drivers/block/rbd.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 36d2b9f4e836..436baa66f701 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1535,7 +1535,7 @@ static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request)
static void rbd_obj_request_get(struct rbd_obj_request *obj_request)
{
dout("%s: obj %p (was %d)\n", __func__, obj_request,
- atomic_read(&obj_request->kref.refcount));
+ kref_read(&obj_request->kref));
kref_get(&obj_request->kref);
}
@@ -1544,14 +1544,14 @@ static void rbd_obj_request_put(struct rbd_obj_request *obj_request)
{
rbd_assert(obj_request != NULL);
dout("%s: obj %p (was %d)\n", __func__, obj_request,
- atomic_read(&obj_request->kref.refcount));
+ kref_read(&obj_request->kref));
kref_put(&obj_request->kref, rbd_obj_request_destroy);
}
static void rbd_img_request_get(struct rbd_img_request *img_request)
{
dout("%s: img %p (was %d)\n", __func__, img_request,
- atomic_read(&img_request->kref.refcount));
+ kref_read(&img_request->kref));
kref_get(&img_request->kref);
}
@@ -1562,7 +1562,7 @@ static void rbd_img_request_put(struct rbd_img_request *img_request)
{
rbd_assert(img_request != NULL);
dout("%s: img %p (was %d)\n", __func__, img_request,
- atomic_read(&img_request->kref.refcount));
+ kref_read(&img_request->kref));
if (img_request_child_test(img_request))
kref_put(&img_request->kref, rbd_parent_request_destroy);
else