Re: [PATCH v3 05/11] drivers/base/memory: Pass a block_id to init_memory_block()

Michal Hocko
2019-07-01T07:56:15Z

On Mon 27-05-19 13:11:46, David Hildenbrand wrote:
> We'll rework hotplug_memory_register() shortly, so it no longer consumes
> pass a section.
>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: "Rafael J. Wysocki" <rafael@kernel.org>
> Signed-off-by: David Hildenbrand <david@redhat.com>

Acked-by: Michal Hocko <mhocko@suse.com>

> ---
> drivers/base/memory.c | 15 +++++++--------
> 1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index f180427e48f4..f914fa6fe350 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -651,21 +651,18 @@ int register_memory(struct memory_block *memory)
> return ret;
> }
>
> -static int init_memory_block(struct memory_block **memory,
> - struct mem_section *section, unsigned long state)
> +static int init_memory_block(struct memory_block **memory, int block_id,
> + unsigned long state)
> {
> struct memory_block *mem;
> unsigned long start_pfn;
> - int scn_nr;
> int ret = 0;
>
> mem = kzalloc(sizeof(*mem), GFP_KERNEL);
> if (!mem)
> return -ENOMEM;
>
> - scn_nr = __section_nr(section);
> - mem->start_section_nr > - base_memory_block_id(scn_nr) * sections_per_block;
> + mem->start_section_nr = block_id * sections_per_block;
> mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
> mem->state = state;
> start_pfn = section_nr_to_pfn(mem->start_section_nr);
> @@ -694,7 +691,8 @@ static int add_memory_block(int base_section_nr)
>
> if (section_count = 0)
> return 0;
> - ret = init_memory_block(&mem, __nr_to_section(section_nr), MEM_ONLINE);
> + ret = init_memory_block(&mem, base_memory_block_id(base_section_nr),
> + MEM_ONLINE);
> if (ret)
> return ret;
> mem->section_count = section_count;
> @@ -707,6 +705,7 @@ static int add_memory_block(int base_section_nr)
> */
> int hotplug_memory_register(int nid, struct mem_section *section)
> {
> + int block_id = base_memory_block_id(__section_nr(section));
> int ret = 0;
> struct memory_block *mem;
>
> @@ -717,7 +716,7 @@ int hotplug_memory_register(int nid, struct mem_section *section)
> mem->section_count++;
> put_device(&mem->dev);
> } else {
> - ret = init_memory_block(&mem, section, MEM_OFFLINE);
> + ret = init_memory_block(&mem, block_id, MEM_OFFLINE);
> if (ret)
> goto out;
> mem->section_count++;
> --
> 2.20.1

--
Michal Hocko
SUSE Labs