linux-kernel - [PATCH 2/2] proc: code cleanup for proc_setup_thread

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Message-Id: <20190124030150.8472-2-cgxu519@gmx.com>
Date:   Thu, 24 Jan 2019 11:01:50 +0800
From:   Chengguang Xu <cgxu519@....com>
To:     adobriyan@...il.com, akpm@...ux-foundation.org
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chengguang Xu <cgxu519@....com>
Subject: [PATCH 2/2] proc: code cleanup for proc_setup_thread_self()

Remove unnecessary ERR_PTR()/PTR_ERR() cast in
proc_setup_thread_self().

Signed-off-by: Chengguang Xu <cgxu519@....com>
---
 fs/proc/thread_self.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/proc/thread_self.c b/fs/proc/thread_self.c
index b905010ca9eb..f61ae53533f5 100644
--- a/fs/proc/thread_self.c
+++ b/fs/proc/thread_self.c
@@ -38,6 +38,7 @@ int proc_setup_thread_self(struct super_block *s)
 	struct inode *root_inode = d_inode(s->s_root);
 	struct pid_namespace *ns = proc_pid_ns(root_inode);
 	struct dentry *thread_self;
+	int ret = -ENOMEM;
 
 	inode_lock(root_inode);
 	thread_self = d_alloc_name(s->s_root, "thread-self");
@@ -51,20 +52,19 @@ int proc_setup_thread_self(struct super_block *s)
 			inode->i_gid = GLOBAL_ROOT_GID;
 			inode->i_op = &proc_thread_self_inode_operations;
 			d_add(thread_self, inode);
+			ret = 0;
 		} else {
 			dput(thread_self);
-			thread_self = ERR_PTR(-ENOMEM);
 		}
-	} else {
-		thread_self = ERR_PTR(-ENOMEM);
 	}
 	inode_unlock(root_inode);
-	if (IS_ERR(thread_self)) {
+
+	if (ret)
 		pr_err("proc_fill_super: can't allocate /proc/thread_self\n");
-		return PTR_ERR(thread_self);
-	}
-	ns->proc_thread_self = thread_self;
-	return 0;
+	else
+		ns->proc_thread_self = thread_self;
+
+	return ret;
 }
 
 void __init proc_thread_self_init(void)
-- 
2.20.1