From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] libnvdimm, region: hide persistence_domain when unknown
Date: Tue, 20 Mar 2018 21:23:21 -0700 [thread overview]
Message-ID: <152160620119.29833.14356675736401790361.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
Similar to other region attributes, do not emit the persistence_domain
attribute if its contents are empty.
Fixes: 96c3a239054a ("libnvdimm: expose platform persistence attr...")
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/nvdimm/region_devs.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index e6d01911e092..a8e9d428c0a5 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -593,6 +593,13 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
return 0;
}
+ if (a == &dev_attr_persistence_domain.attr) {
+ if ((nd_region->flags & (BIT(ND_REGION_PERSIST_CACHE)
+ | BIT(ND_REGION_PERSIST_MEMCTRL))) == 0)
+ return 0;
+ return a->mode;
+ }
+
if (a != &dev_attr_set_cookie.attr
&& a != &dev_attr_available_size.attr)
return a->mode;
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next reply other threads:[~2018-03-21 4:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-21 4:23 Dan Williams [this message]
2018-03-21 17:11 ` [PATCH] libnvdimm, region: hide persistence_domain when unknown Ross Zwisler
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