The objects of "struct bootmem_data_t" are being linked together
to form double-linked list sequentially based on its minimal page
frame number. Current implementation implicitly supports the
following cases, which means the inserting point for current bootmem
data depends on how "list_for_each" works. That makes the code a
little hard to read. Besides, "list_for_each" and "list_entry" can
be replaced with "list_for_each_entry".
- The linked list is empty.
- There has no entry in the linked list, whose minimal page
frame number is bigger than current one.
Signed-off-by: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx>
---
mm/bootmem.c | 16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 0131170..5a04536 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -77,16 +77,16 @@ unsigned long __init bootmem_bootmap_pages(unsigned long pages)
*/
static void __init link_bootmem(bootmem_data_t *bdata)
{
- struct list_head *iter;
+ bootmem_data_t *ent;
- list_for_each(iter, &bdata_list) {
- bootmem_data_t *ent;
-
- ent = list_entry(iter, bootmem_data_t, list);
- if (bdata->node_min_pfn < ent->node_min_pfn)
- break;
+ list_for_each_entry(ent, &bdata_list, list) {
+ if (bdata->node_min_pfn < ent->node_min_pfn) {
+ list_add_tail(&bdata->list, &ent->list);
+ return;
+ }
}
- list_add_tail(&bdata->list, iter);
+
+ list_add_tail(&bdata->list, &bdata_list);
}
/*
--
1.7.5.4
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