If the page cache is not large enough to store the atomic copy, we allocate
extra pages. This routine is used at cleanup to free that memory.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/pagedir.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/kernel/power/pagedir.c b/kernel/power/pagedir.c
index 1e0995e..9c26990 100644
--- a/kernel/power/pagedir.c
+++ b/kernel/power/pagedir.c
@@ -31,3 +31,26 @@ struct extras {
struct extras *next;
} *extras_list;
+/* suspend_free_extra_pagedir_memory
+ *
+ * Description: Free previously allocated extra pagedir memory.
+ */
+void suspend_free_extra_pagedir_memory(void)
+{
+ /* Free allocated pages */
+ while (extras_list) {
+ struct extras *this = extras_list;
+ int i;
+
+ extras_list = this->next;
+
+ for (i = 0; i < (1 << this->order); i++)
+ ClearPageNosave(this->page + i);
+
+ __free_pages(this->page, this->order);
+ kfree(this);
+ }
+
+ extra_pagedir_pages_allocated = 0;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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