Messages in this thread | | | From | Marco Elver <> | Date | Mon, 7 Mar 2022 00:52:48 +0100 | Subject | Re: [PATCH v2 2/2] kfence: Alloc kfence_pool after system startup |
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On Sat, 5 Mar 2022 at 15:49, Tianchen Ding <dtcccc@linux.alibaba.com> wrote: [...] > +static int kfence_init_late(void) > +{ > + const unsigned long nr_pages = KFENCE_POOL_SIZE / PAGE_SIZE; > + struct page *pages; > + > + pages = alloc_contig_pages(nr_pages, GFP_KERNEL, first_online_node, NULL);
> mm/kfence/core.c:836:17: error: implicit declaration of function ‘alloc_contig_pages’ [-Werror=implicit-function-declaration]
This doesn't build without CMA. See ifdef CONFIG_CONTIG_ALLOC in gfp.h, which declares alloc_contig_pages.
Will alloc_pages() work as you expect? If so, perhaps only use alloc_contig_pages() #ifdef CONFIG_CONTIG_ALLOC.
Thanks, -- Marco
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