linux-kernel - [PATCH] xen/evtchn: use rb

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Message-Id: <56f3df3380cd7214ce0b2e151f2aa757b0eaca2c.1482205472.git.geliangtang@gmail.com>
Date:   Tue, 20 Dec 2016 22:02:20 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>
Cc:     Geliang Tang <geliangtang@...il.com>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: [PATCH] xen/evtchn: use rb_entry()

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 drivers/xen/evtchn.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index e8c7f09..6890897 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -125,7 +125,7 @@ static int add_evtchn(struct per_user_data *u, struct user_evtchn *evtchn)
 	while (*new) {
 		struct user_evtchn *this;
 
-		this = container_of(*new, struct user_evtchn, node);
+		this = rb_entry(*new, struct user_evtchn, node);
 
 		parent = *new;
 		if (this->port < evtchn->port)
@@ -157,7 +157,7 @@ static struct user_evtchn *find_evtchn(struct per_user_data *u, unsigned port)
 	while (node) {
 		struct user_evtchn *evtchn;
 
-		evtchn = container_of(node, struct user_evtchn, node);
+		evtchn = rb_entry(node, struct user_evtchn, node);
 
 		if (evtchn->port < port)
 			node = node->rb_left;
-- 
2.9.3