From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@suse.com,
rppt@linux.ibm.com, osalvador@suse.de, willy@infradead.org,
william.kucharski@oracle.com, Baoquan He <bhe@redhat.com>
Subject: [PATCH v2 1/4] mm/sparse: Clean up the obsolete code comment
Date: Tue, 26 Mar 2019 17:02:24 +0800 [thread overview]
Message-ID: <20190326090227.3059-2-bhe@redhat.com> (raw)
In-Reply-To: <20190326090227.3059-1-bhe@redhat.com>
The code comment above sparse_add_one_section() is obsolete and
incorrect, clean it up and write new one.
Signed-off-by: Baoquan He <bhe@redhat.com>
---
v1-v2:
Add comments to explain what the returned value means for
each error code.
mm/sparse.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/mm/sparse.c b/mm/sparse.c
index 69904aa6165b..b2111f996aa6 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -685,9 +685,18 @@ static void free_map_bootmem(struct page *memmap)
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
/*
- * returns the number of sections whose mem_maps were properly
- * set. If this is <=0, then that means that the passed-in
- * map was not consumed and must be freed.
+ * sparse_add_one_section - add a memory section
+ * @nid: The node to add section on
+ * @start_pfn: start pfn of the memory range
+ * @altmap: device page map
+ *
+ * This is only intended for hotplug.
+ *
+ * Returns:
+ * 0 on success.
+ * Other error code on failure:
+ * - -EEXIST - section has been present.
+ * - -ENOMEM - out of memory.
*/
int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
struct vmem_altmap *altmap)
--
2.17.2
next prev parent reply other threads:[~2019-03-26 9:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-26 9:02 [PATCH v2 0/4] Clean up comments and codes in sparse_add_one_section() Baoquan He
2019-03-26 9:02 ` Baoquan He [this message]
2019-03-26 9:23 ` [PATCH v2 1/4] mm/sparse: Clean up the obsolete code comment Mike Rapoport
2019-03-26 9:23 ` Michal Hocko
2019-03-26 9:30 ` Baoquan He
2019-03-26 9:36 ` Chao Fan
2019-03-26 9:43 ` Baoquan He
2019-03-26 9:46 ` Chao Fan
2019-03-26 9:02 ` [PATCH v2 2/4] mm/sparse: Optimize sparse_add_one_section() Baoquan He
2019-03-26 9:23 ` Mike Rapoport
2019-03-26 9:29 ` Michal Hocko
2019-03-26 10:08 ` Baoquan He
2019-03-26 10:17 ` Michal Hocko
2019-03-26 13:45 ` Baoquan He
2019-03-26 13:57 ` Mike Rapoport
2019-03-26 14:03 ` Michal Hocko
2019-03-26 14:18 ` Baoquan He
2019-03-26 14:31 ` Michal Hocko
2019-03-26 22:57 ` Baoquan He
2019-03-26 9:02 ` [PATCH v2 3/4] mm/sparse: Rename function related to section memmap allocation/free Baoquan He
2019-03-26 9:02 ` [PATCH v2 4/4] drivers/base/memory.c: Rename the misleading parameter Baoquan He
2019-03-26 9:20 ` Rafael J. Wysocki
2019-03-26 9:33 ` Michal Hocko
2019-03-26 11:43 ` Matthew Wilcox
2019-03-26 12:42 ` Baoquan He
2019-03-29 6:44 ` [PATCH v2 0/4] Clean up comments and codes in sparse_add_one_section() Baoquan He
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