linux-kernel - [PATCH] nvdimm: fix compilation warnings with W=1

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Date:   Thu, 16 May 2019 12:04:53 -0400
From:   Qian Cai <cai@....pw>
To:     dan.j.williams@...el.com
Cc:     akpm@...ux-foundation.org, vishal.l.verma@...el.com,
        dave.jiang@...el.com, keith.busch@...el.com, ira.weiny@...el.com,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        Qian Cai <cai@....pw>
Subject: [PATCH] nvdimm: fix compilation warnings with W=1

Several places (dimm_devs.c, core.c etc) include label.h but only
label.c uses NSINDEX_SIGNATURE, so move its definition to label.c
instead.

In file included from drivers/nvdimm/dimm_devs.c:23:
drivers/nvdimm/label.h:41:19: warning: 'NSINDEX_SIGNATURE' defined but
not used [-Wunused-const-variable=]

Also, some places abuse "/**" which is only reserved for the kernel-doc.

drivers/nvdimm/bus.c:648: warning: cannot understand function prototype:
'struct attribute_group nd_device_attribute_group = '
drivers/nvdimm/bus.c:677: warning: cannot understand function prototype:
'struct attribute_group nd_numa_attribute_group = '

Those are just some member assignments for the "struct attribute_group"
instances and it can't be expressed in the kernel-doc.

Reviewed-by: Vishal Verma <vishal.l.verma@...el.com>
Signed-off-by: Qian Cai <cai@....pw>
---
 drivers/nvdimm/bus.c   | 4 ++--
 drivers/nvdimm/label.c | 2 ++
 drivers/nvdimm/label.h | 2 --
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 7ff684159f29..2eb6a6cfe9e4 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -642,7 +642,7 @@ static ssize_t devtype_show(struct device *dev, struct device_attribute *attr,
 	NULL,
 };
 
-/**
+/*
  * nd_device_attribute_group - generic attributes for all devices on an nd bus
  */
 struct attribute_group nd_device_attribute_group = {
@@ -671,7 +671,7 @@ static umode_t nd_numa_attr_visible(struct kobject *kobj, struct attribute *a,
 	return a->mode;
 }
 
-/**
+/*
  * nd_numa_attribute_group - NUMA attributes for all devices on an nd bus
  */
 struct attribute_group nd_numa_attribute_group = {
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 2030805aa216..edf278067e72 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -25,6 +25,8 @@
 static guid_t nvdimm_pfn_guid;
 static guid_t nvdimm_dax_guid;
 
+static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0";
+
 static u32 best_seq(u32 a, u32 b)
 {
 	a &= NSINDEX_SEQ_MASK;
diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h
index e9a2ad3c2150..4bb7add39580 100644
--- a/drivers/nvdimm/label.h
+++ b/drivers/nvdimm/label.h
@@ -38,8 +38,6 @@ enum {
 	ND_NSINDEX_INIT = 0x1,
 };
 
-static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0";
-
 /**
  * struct nd_namespace_index - label set superblock
  * @sig: NAMESPACE_INDEX\0
-- 
1.8.3.1