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CWLuGn1W/+Q1Sr4R0lp6EDod6Fxj06L7E+AtQwI7fBzomZetwOTXb8s2yXwzcsYrb1UoqRqFoaZ3dJ++a9l6evtSTNoJj3GVbhQCSSK3XSQPotip9SUqgWlviOvUlM+GE/iOE2g//4VEQ2xvNsfy5sVKfroMRMcbO6vVoL9ft41vpSNsdcfGjXhZtfPA9m8KT0JHmYkpmVWqDsU3PDpDBPI91sE+Ht3mtQePWREqPQEdy7LTn4DNF3VJ1lydlaVHMq1oRE2Z7h0ssnPBWgctB7Mzt7uS283I5+uM4LG1qlhtC86DQv0f5+qxQJ5BHyktDYKzNQ3F3mZzCK6PmDaY3WsApU5eSKuSaMFVSJwI/XqJUH5HqZeANGTOQX4hvqCBTI+jGIDOVd5/Sf5PFpwSlK6JTYTratJxSgeVnQSljqVzJULxI5TP/Rt1XcEF/D5NtLdnW1Nht/DgBypPqKsLsiQsdJ0PoaqMVoxpGQujMxnn9ahg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > Instead of looping over numa_meminfo array to detect node's start and > end addresses use get_pfn_range_for_init(). > > This is shorter and make it easier to lift numa_memblks to generic code. > > Signed-off-by: Mike Rapoport (Microsoft) > Tested-by: Zi Yan # for x86_64 and arm64 > --- > arch/x86/mm/numa.c | 13 +++---------- > 1 file changed, 3 insertions(+), 10 deletions(-) > > diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c > index edfc38803779..cfe7e5477cf8 100644 > --- a/arch/x86/mm/numa.c > +++ b/arch/x86/mm/numa.c > @@ -521,17 +521,10 @@ static int __init numa_register_memblks(struct numa_meminfo *mi) > > /* Finally register nodes. */ > for_each_node_mask(nid, node_possible_map) { > - u64 start = PFN_PHYS(max_pfn); > - u64 end = 0; > + unsigned long start_pfn, end_pfn; > > - for (i = 0; i < mi->nr_blks; i++) { > - if (nid != mi->blk[i].nid) > - continue; > - start = min(mi->blk[i].start, start); > - end = max(mi->blk[i].end, end); > - } > - > - if (start >= end) > + get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); > + if (start_pfn >= end_pfn) Assuming I understand why this works, would it be worth a comment like: "Note, get_pfn_range_for_nid() depends on memblock_set_node() having already happened" ...at least that context was not part of the diff so took me second to figure out how this works.