From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx165.postini.com [74.125.245.165]) by kanga.kvack.org (Postfix) with SMTP id 41B1D6B0044 for ; Wed, 9 May 2012 21:17:29 -0400 (EDT) Received: from /spool/local by e3.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 9 May 2012 21:17:26 -0400 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 0C50E38C805E for ; Wed, 9 May 2012 21:17:06 -0400 (EDT) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q4A1H5WO16646362 for ; Wed, 9 May 2012 21:17:06 -0400 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q4A6lvHd007374 for ; Thu, 10 May 2012 02:47:58 -0400 From: Gavin Shan Subject: [PATCH] MM: cleanup on addition to bootmem data list Date: Thu, 10 May 2012 09:17:00 +0800 Message-Id: <1336612620-7596-1-git-send-email-shangw@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: akpm@linux-foundation.org, hannes@cmpxchg.org, Gavin Shan 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 Acked-by: Johannes Weiner --- 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