From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx156.postini.com [74.125.245.156]) by kanga.kvack.org (Postfix) with SMTP id D365C6B004A for ; Thu, 26 Apr 2012 23:41:50 -0400 (EDT) Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 27 Apr 2012 03:23:09 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q3R3Z2q91622174 for ; Fri, 27 Apr 2012 13:35:02 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q3R3fkUf010695 for ; Fri, 27 Apr 2012 13:41:46 +1000 From: Gavin Shan Subject: [PATCH 1/2] MM: fixup on addition to bootmem data list Date: Fri, 27 Apr 2012 11:41:43 +0800 Message-Id: <1335498104-31900-1-git-send-email-shangw@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: shangw@linux.vnet.ibm.com 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 --- 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org