[PATCH v1 06/11] fs/proc/vmcore: factor out freeing a list of vmcore ranges

[David Hildenbrand <david@redhat.com>]

Let's factor it out into include/linux/crash_dump.h, from where we can
use it also outside of vmcore.c later.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 fs/proc/vmcore.c           |  9 +--------
 include/linux/crash_dump.h | 11 +++++++++++
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 76fdc3fb8c0e..3e90416ee54e 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -1568,14 +1568,7 @@ void vmcore_cleanup(void)
 		proc_vmcore = NULL;
 	}
 
-	/* clear the vmcore list. */
-	while (!list_empty(&vmcore_list)) {
-		struct vmcore_mem_node *m;
-
-		m = list_first_entry(&vmcore_list, struct vmcore_mem_node, list);
-		list_del(&m->list);
-		kfree(m);
-	}
+	vmcore_free_mem_nodes(&vmcore_list);
 	free_elfcorebuf();
 
 	/* clear vmcore device dump list */
diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index ae77049fc023..722dbcff7371 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h
@@ -135,6 +135,17 @@ static inline int vmcore_alloc_add_mem_node(struct list_head *list,
 	return 0;
 }
 
+/* Free a list of vmcore memory nodes. */
+static inline void vmcore_free_mem_nodes(struct list_head *list)
+{
+	struct vmcore_mem_node *m, *tmp;
+
+	list_for_each_entry_safe(m, tmp, list, list) {
+		list_del(&m->list);
+		kfree(m);
+	}
+}
+
 #else /* !CONFIG_CRASH_DUMP */
 static inline bool is_kdump_kernel(void) { return false; }
 #endif /* CONFIG_CRASH_DUMP */
-- 
2.46.1