Ccing linux-mm
On 08/27/15 at 04:43pm, Jan Stancek wrote:
> Split single loop going over all pfn in mem_blk into 2 loops,
> where outer loop goes over all sections and inner loop goes over
> pfn from that section.
>
> This is preparatory patch for next patch:
> "skip non-present sections in register_mem_sect_under_node"
>
> Signed-off-by: Jan Stancek <jstancek@xxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> drivers/base/node.c | 41 ++++++++++++++++++++++++-----------------
> 1 file changed, 24 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/base/node.c b/drivers/base/node.c
> index 31df474d72f4..4c7423a4b5f4 100644
> --- a/drivers/base/node.c
> +++ b/drivers/base/node.c
> @@ -379,33 +379,40 @@ static int __init_refok get_nid_for_pfn(unsigned long pfn)
> int register_mem_sect_under_node(struct memory_block *mem_blk, int nid)
> {
> int ret;
> - unsigned long pfn, sect_start_pfn, sect_end_pfn;
> + unsigned long pfn, sect_start_pfn, sect_end_pfn, sect_no;
>
> if (!mem_blk)
> return -EFAULT;
> if (!node_online(nid))
> return 0;
>
> - sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
> - sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
> - sect_end_pfn += PAGES_PER_SECTION - 1;
> - for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
> - int page_nid;
> + for (sect_no = mem_blk->start_section_nr;
> + sect_no <= mem_blk->end_section_nr;
> + sect_no++) {
>
> - page_nid = get_nid_for_pfn(pfn);
> - if (page_nid < 0)
> - continue;
> - if (page_nid != nid)
> - continue;
> - ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
> - &mem_blk->dev.kobj,
> - kobject_name(&mem_blk->dev.kobj));
> - if (ret)
> - return ret;
> + sect_start_pfn = section_nr_to_pfn(sect_no);
> + sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1;
> +
> + for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
> + int page_nid;
>
> - return sysfs_create_link_nowarn(&mem_blk->dev.kobj,
> + page_nid = get_nid_for_pfn(pfn);
> + if (page_nid < 0)
> + continue;
> + if (page_nid != nid)
> + continue;
> +
> + ret = sysfs_create_link_nowarn(
> + &node_devices[nid]->dev.kobj,
> + &mem_blk->dev.kobj,
> + kobject_name(&mem_blk->dev.kobj));
> + if (ret)
> + return ret;
> +
> + return sysfs_create_link_nowarn(&mem_blk->dev.kobj,
> &node_devices[nid]->dev.kobj,
> kobject_name(&node_devices[nid]->dev.kobj));
> + }
> }
> /* mem section does not span the specified node */
> return 0;
> --
> 1.8.3.1
>
> --
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