On Tue, Mar 26, 2019 at 05:02:24PM +0800, Baoquan He wrote: > The code comment above sparse_add_one_section() is obsolete and 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> Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> > --- > 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 > -- Sincerely yours, Mike.
