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authorPeter Zijlstra <peterz@infradead.org>2016-11-14 19:29:48 +0300
committerIngo Molnar <mingo@kernel.org>2017-01-14 13:37:18 +0300
commit2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e (patch)
tree4ccb975ac9142887b4e7e7bf1c0cca5c53d4cf99 /net/ceph/messenger.c
parent1e24edca0557dba6486d39d3c24c288475432bcf (diff)
downloadlinux-2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e.tar.xz
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 'net/ceph/messenger.c')
-rw-r--r--net/ceph/messenger.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 770c52701efa..bad3d4ae43f6 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -3425,7 +3425,7 @@ static void ceph_msg_release(struct kref *kref)
struct ceph_msg *ceph_msg_get(struct ceph_msg *msg)
{
dout("%s %p (was %d)\n", __func__, msg,
- atomic_read(&msg->kref.refcount));
+ kref_read(&msg->kref));
kref_get(&msg->kref);
return msg;
}
@@ -3434,7 +3434,7 @@ EXPORT_SYMBOL(ceph_msg_get);
void ceph_msg_put(struct ceph_msg *msg)
{
dout("%s %p (was %d)\n", __func__, msg,
- atomic_read(&msg->kref.refcount));
+ kref_read(&msg->kref));
kref_put(&msg->kref, ceph_msg_release);
}
EXPORT_SYMBOL(ceph_msg_put);