linux-kernel - [PATCH] PM/Hibernate: use rb

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Date:	Mon, 19 Mar 2012 00:54:45 +0100
From:	Davidlohr Bueso <dave@....org>
To:	Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>
Cc:	lkml <linux-kernel@...r.kernel.org>, linux-pm@...r.kernel.org
Subject: [PATCH] PM/Hibernate: use rb_entry

From: Davidlohr Bueso <dave@....org>

Since the software suspend extents are organized in an rbtree, use rb_entry
instead of container_of, as it is semantically more appropriate in order to
get a node as it is iterated.

Signed-off-by: Davidlohr Bueso <dave@....org>
---
 kernel/power/swap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 8742fd0..1529b83 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -109,7 +109,7 @@ static int swsusp_extents_insert(unsigned long swap_offset)
 
 	/* Figure out where to put the new node */
 	while (*new) {
-		ext = container_of(*new, struct swsusp_extent, node);
+		ext = rb_entry(*new, struct swsusp_extent, node);
 		parent = *new;
 		if (swap_offset < ext->start) {
 			/* Try to merge */
@@ -175,7 +175,7 @@ void free_all_swap_pages(int swap)
 		struct swsusp_extent *ext;
 		unsigned long offset;
 
-		ext = container_of(node, struct swsusp_extent, node);
+		ext = rb_entry(node, struct swsusp_extent, node);
 		rb_erase(node, &swsusp_extents);
 		for (offset = ext->start; offset <= ext->end; offset++)
 			swap_free(swp_entry(swap, offset));
-- 
1.7.4.1



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