[Suspend2][ 3/9] [Suspend2] Free a whole extent chain.

[Nigel Cunningham]

Add a routine to free an entire extent chain at once.

Signed-off-by: Nigel Cunningham <nigel@xxxxxxxxxxxx>

 kernel/power/extent.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/kernel/power/extent.c b/kernel/power/extent.c
index 2fb6a23..ab19509 100644
--- a/kernel/power/extent.c
+++ b/kernel/power/extent.c
@@ -47,3 +47,26 @@ void suspend_put_extent(struct extent *e
 	suspend_extents_allocated--;
 }
 
+/* suspend_put_extent_chain.
+ *
+ * Frees a whole chain of extents.
+ */
+void suspend_put_extent_chain(struct extent_chain *chain)
+{
+	struct extent *this;
+
+	this = chain->first;
+
+	while(this) {
+		struct extent *next = this->next;
+		kfree(this);
+		chain->frees++;
+		suspend_extents_allocated --;
+		this = next;
+	}
+	
+	BUG_ON(chain->frees != chain->allocs);
+	chain->first = chain->last = chain->last_touched = NULL;
+	chain->size = chain->allocs = chain->frees = 0;
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
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