Dan Williams 52e73eb287 device-dax: fix percpu_ref_exit ordering ... We need to wait until the percpu_ref is released before exit. Otherwise, we sometimes lose the race and trigger this new warning that was added in v4.9 (commit a67823c1ed "percpu-refcount: init ->confirm_switch member properly"): WARNING: CPU: 0 PID: 3629 at lib/percpu-refcount.c:107 percpu_ref_exit+0x51/0x60 [..] Call Trace: [<ffffffff814bf093>] dump_stack+0x85/0xc2 [<ffffffff810b15db>] __warn+0xcb/0xf0 [<ffffffff810b170d>] warn_slowpath_null+0x1d/0x20 [<ffffffff814d70c1>] percpu_ref_exit+0x51/0x60 [<ffffffffa005706a>] dax_pmem_percpu_exit+0x1a/0x50 [dax_pmem] [<ffffffff81615f1f>] devm_action_release+0xf/0x20 Cc: <stable@vger.kernel.org> Fixes: ab68f26221 ("/dev/dax, pmem: direct access to persistent memory") Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2016-10-27 17:04:05 -07:00
..
Kconfig	nvdimm: make CONFIG_NVDIMM_DAX 'bool'	2016-10-27 16:16:21 -07:00
Makefile	/dev/dax, pmem: direct access to persistent memory	2016-05-20 22:02:53 -07:00
dax.c	Merge branch 'for-4.9/dax' into libnvdimm-for-next	2016-10-07 16:46:30 -07:00
dax.h	dax: convert devm_create_dax_dev to PTR_ERR	2016-10-07 16:45:59 -07:00
pmem.c	device-dax: fix percpu_ref_exit ordering	2016-10-27 17:04:05 -07:00