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SubjectRe: [PATCH v3 4/4] hugetlb: Clean up hugetlb_cma_reserve
On Wed, 13 Apr 2022, Peng Liu wrote:

>Use more generic functions to deal with issues related to online
>nodes. The changes will make the code simplified.
>
>Signed-off-by: Peng Liu <liupeng256@huawei.com>
>Reviewed-by: Muchun Song <songmuchun@bytedance.com>
>Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
>Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>

>---
> mm/hugetlb.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/mm/hugetlb.c b/mm/hugetlb.c
>index 2e4d8d9fb7c6..4c529774cc08 100644
>--- a/mm/hugetlb.c
>+++ b/mm/hugetlb.c
>@@ -6953,7 +6953,7 @@ void __init hugetlb_cma_reserve(int order)
> if (hugetlb_cma_size_in_node[nid] == 0)
> continue;
>
>- if (!node_state(nid, N_ONLINE)) {
>+ if (!node_online(nid)) {

You could update mm/page_ext.c as well

> pr_warn("hugetlb_cma: invalid node %d specified\n", nid);
> hugetlb_cma_size -= hugetlb_cma_size_in_node[nid];
> hugetlb_cma_size_in_node[nid] = 0;
>@@ -6992,7 +6992,7 @@ void __init hugetlb_cma_reserve(int order)
> }
>
> reserved = 0;
>- for_each_node_state(nid, N_ONLINE) {
>+ for_each_online_node(nid) {

... and arch/ia64/kernel/uncached.c for this.

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