6lowpan: fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/6lowpan/debugfs.c

@@ -41,9 +41,9 @@ static int lowpan_ctx_flag_active_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_active_fops,
-			lowpan_ctx_flag_active_get,
-			lowpan_ctx_flag_active_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_active_fops,
+			 lowpan_ctx_flag_active_get,
+			 lowpan_ctx_flag_active_set, "%llu\n");
 
 static int lowpan_ctx_flag_c_set(void *data, u64 val)
 {
@@ -66,8 +66,8 @@ static int lowpan_ctx_flag_c_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
-			lowpan_ctx_flag_c_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
+			 lowpan_ctx_flag_c_set, "%llu\n");
 
 static int lowpan_ctx_plen_set(void *data, u64 val)
 {
@@ -97,8 +97,8 @@ static int lowpan_ctx_plen_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
-			lowpan_ctx_plen_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
+			 lowpan_ctx_plen_set, "%llu\n");
 
 static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset)
 {
@@ -184,15 +184,15 @@ static int lowpan_dev_debugfs_ctx_init(struct net_device *dev,
 	if (!root)
 		return -EINVAL;
 
-	dentry = debugfs_create_file("active", 0644, root,
-				     &ldev->ctx.table[id],
-				     &lowpan_ctx_flag_active_fops);
+	dentry = debugfs_create_file_unsafe("active", 0644, root,
+					    &ldev->ctx.table[id],
+					    &lowpan_ctx_flag_active_fops);
 	if (!dentry)
 		return -EINVAL;
 
-	dentry = debugfs_create_file("compression", 0644, root,
-				     &ldev->ctx.table[id],
-				     &lowpan_ctx_flag_c_fops);
+	dentry = debugfs_create_file_unsafe("compression", 0644, root,
+					    &ldev->ctx.table[id],
+					    &lowpan_ctx_flag_c_fops);
 	if (!dentry)
 		return -EINVAL;
 
@@ -202,9 +202,9 @@ static int lowpan_dev_debugfs_ctx_init(struct net_device *dev,
 	if (!dentry)
 		return -EINVAL;
 
-	dentry = debugfs_create_file("prefix_len", 0644, root,
-				     &ldev->ctx.table[id],
-				     &lowpan_ctx_plen_fops);
+	dentry = debugfs_create_file_unsafe("prefix_len", 0644, root,
+					    &ldev->ctx.table[id],
+					    &lowpan_ctx_plen_fops);
 	if (!dentry)
 		return -EINVAL;
 
@@ -245,8 +245,8 @@ static int lowpan_short_addr_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get,
-			NULL, "0x%04llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL,
+			 "0x%04llx\n");
 
 static int lowpan_dev_debugfs_802154_init(const struct net_device *dev,
 					  struct lowpan_dev *ldev)
@@ -260,9 +260,9 @@ static int lowpan_dev_debugfs_802154_init(const struct net_device *dev,
 	if (!root)
 		return -EINVAL;
 
-	dentry = debugfs_create_file("short_addr", 0444, root,
-				     lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
-				     &lowpan_short_addr_fops);
+	dentry = debugfs_create_file_unsafe("short_addr", 0444, root,
+					    lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
+					    &lowpan_short_addr_fops);
 	if (!dentry)
 		return -EINVAL;