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Subject[PATCH 1/3] mm/sparse: Clean up the obsolete code comment
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The code comment above sparse_add_one_section() is obsolete and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>
---
mm/sparse.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 77a0554fa5bd..0a0f82c5d969 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -674,9 +674,12 @@ 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
+ *
+ * Return 0 on success and an appropriate error code otherwise.
*/
int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
struct vmem_altmap *altmap)
--
2.17.2
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