The code comment above sparse_add_one_section() is obsolete and incorrect, clean it up and write new one.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@xxxxxxxxxx> --- 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
