linux-kernel - [PATCH v1 1/1] nvdimm/namespace: drop unneeded temporary variable in size

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Message-Id: <20220607153750.33639-1-andriy.shevchenko@linux.intel.com>
Date:   Tue,  7 Jun 2022 18:37:50 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Dan Williams <dan.j.williams@...el.com>, nvdimm@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Cc:     Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] nvdimm/namespace: drop unneeded temporary variable in size_store()

Refactor size_store() in order to remove temporary variable on stack
by joining conditionals.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/nvdimm/namespace_devs.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 3dae17c90e8c..0f863fda56e6 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -836,7 +836,6 @@ static ssize_t size_store(struct device *dev,
 {
 	struct nd_region *nd_region = to_nd_region(dev->parent);
 	unsigned long long val;
-	uuid_t **uuid = NULL;
 	int rc;
 
 	rc = kstrtoull(buf, 0, &val);
@@ -850,16 +849,12 @@ static ssize_t size_store(struct device *dev,
 	if (rc >= 0)
 		rc = nd_namespace_label_update(nd_region, dev);
 
-	if (is_namespace_pmem(dev)) {
+	/* setting size zero == 'delete namespace' */
+	if (rc == 0 && val == 0 && is_namespace_pmem(dev)) {
 		struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
 
-		uuid = &nspm->uuid;
-	}
-
-	if (rc == 0 && val == 0 && uuid) {
-		/* setting size zero == 'delete namespace' */
-		kfree(*uuid);
-		*uuid = NULL;
+		kfree(nspm->uuid);
+		nspm->uuid = NULL;
 	}
 
 	dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
-- 
2.35.1