leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

locking/atomic, kref: Add kref_read()

Browse Source 
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>
This commit is contained in:
Peter Zijlstra
2016-11-14 17:29:48 +01:00
committed by Ingo Molnar
parent 1e24edca05
commit 2c935bc572
56 changed files with 121 additions and 117 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/hotplug/pnv_php.c
View File

@@ -155,7 +155,7 @@ static void pnv_php_detach_device_nodes(struct device_node *parent)
pnv_php_detach_device_nodes(dn);
of_node_put(dn);
refcount = atomic_read(&dn->kobj.kref.refcount);
refcount = kref_read(&dn->kobj.kref);
if (refcount != 1)
pr_warn("Invalid refcount %d on <%s>\n",
refcount, of_node_full_name(dn));