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authorGavin Shan <shangw@linux.vnet.ibm.com>2012-05-29 15:06:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:24 -0700
commit5c2b8a162b5f8616f709bf20d5ec88f709485522 (patch)
treea07e74eb0f8da552fc9ff0acd1b38817c952ba4c /mm/bootmem.c
parente48982734ea0500d1eba4f9d96195acc5406cad6 (diff)
downloadlinux-5c2b8a162b5f8616f709bf20d5ec88f709485522.tar.gz
mm/bootmem.c: cleanup on addition to bootmem data list
The objects of "struct bootmem_data_t" are linked together to form double-linked list sequentially based on its minimal page frame number. The 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@linux.vnet.ibm.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index d1c7a79d6f3..ec4fcb7a56c 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);
}
/*