From: Gavin Shan <shangw@linux.vnet.ibm.com>
To: linux-mm@kvack.org
Cc: rientjes@google.com, hannes@cmpxchg.org,
akpm@linux-foundation.org, Gavin Shan <shangw@linux.vnet.ibm.com>
Subject: [PATCH 5/5] mm/sparse: return 0 if root mem_section exists
Date: Sat, 23 Jun 2012 23:52:56 +0800 [thread overview]
Message-ID: <1340466776-4976-5-git-send-email-shangw@linux.vnet.ibm.com> (raw)
In-Reply-To: <1340466776-4976-1-git-send-email-shangw@linux.vnet.ibm.com>
Function sparse_index_init() is used to setup memory section descriptors
dynamically. zero should be returned while mem_section[root] already has
been allocated.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
mm/sparse.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/mm/sparse.c b/mm/sparse.c
index a8b99d3..e845a48 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -109,8 +109,12 @@ static int __meminit sparse_index_init(unsigned long section_nr, int nid)
struct mem_section *section;
int ret = 0;
+ /*
+ * If the corresponding mem_section descriptor
+ * has been created, we needn't bother
+ */
if (mem_section[root])
- return -EEXIST;
+ return ret;
section = sparse_index_alloc(nid);
if (!section)
--
1.7.9.5
--
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next prev parent reply other threads:[~2012-06-23 15:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-23 15:52 [PATCH 1/5] mm/sparse: check size of struct mm_section Gavin Shan
2012-06-23 15:52 ` [PATCH 2/5] mm/sparse: optimize sparse_index_alloc Gavin Shan
2012-06-25 15:30 ` Michal Hocko
2012-06-26 6:07 ` Gavin Shan
2012-06-26 7:04 ` Michal Hocko
2012-06-26 7:13 ` Gavin Shan
2012-06-23 15:52 ` [PATCH 3/5] mm/sparse: fix possible memory leak Gavin Shan
2012-06-25 15:48 ` Michal Hocko
2012-06-26 6:11 ` Gavin Shan
2012-06-26 7:14 ` Michal Hocko
2012-06-26 7:17 ` Gavin Shan
2012-06-23 15:52 ` [PATCH 4/5] mm/sparse: more check on mem_section number Gavin Shan
2012-06-26 16:15 ` Dave Hansen
2012-06-27 0:29 ` Gavin Shan
2012-06-23 15:52 ` Gavin Shan [this message]
2012-06-24 19:18 ` [PATCH 5/5] mm/sparse: return 0 if root mem_section exists KOSAKI Motohiro
2012-06-25 1:09 ` Gavin Shan
2012-06-25 15:39 ` Michal Hocko
2012-06-25 16:03 ` [PATCH 1/5] mm/sparse: check size of struct mm_section Michal Hocko
2012-06-25 16:35 ` Gavin Shan
2012-06-26 7:39 ` Michal Hocko
2012-06-26 7:48 ` Gavin Shan
2012-06-26 8:06 ` Michal Hocko
2012-06-26 8:24 ` Gavin Shan
2012-06-26 17:57 ` Michal Hocko
2012-06-27 3:01 ` Gavin Shan
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