Message ID | 20231119165721.9849-8-alexandru.elisei@arm.com (mailing list archive) |
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State | New |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 817EBC072A2 for <linux-mm@archiver.kernel.org>; Sun, 19 Nov 2023 16:58:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1ECDA6B0348; Sun, 19 Nov 2023 11:58:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 19D586B034C; Sun, 19 Nov 2023 11:58:20 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 066546B034E; Sun, 19 Nov 2023 11:58:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id EAA0B6B0348 for <linux-mm@kvack.org>; Sun, 19 Nov 2023 11:58:19 -0500 (EST) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id B486AB54BC for <linux-mm@kvack.org>; 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[RFC,v2,01/27] arm64: mte: Rework naming for tag manipulation functions
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diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 3f34f00ced62..b7a9ab818f6d 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -884,6 +884,13 @@ static inline int arch_prep_new_page(struct page *page, int order, gfp_t gfp) static inline void arch_free_pages_prepare(struct page *page, int order) { } #endif +#ifndef __HAVE_ARCH_ALLOC_CMA +static inline bool arch_alloc_cma(gfp_t gfp) +{ + return true; +} +#endif + #ifndef __HAVE_ARCH_UNMAP_ONE /* * Some architectures support metadata associated with a page. When a diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 86e4b1dac538..0f508070c404 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3167,7 +3167,8 @@ static inline unsigned int gfp_to_alloc_flags_cma(gfp_t gfp_mask, unsigned int alloc_flags) { #ifdef CONFIG_CMA - if (gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE) + if (gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE && + arch_alloc_cma(gfp_mask)) alloc_flags |= ALLOC_CMA; #endif return alloc_flags;
As an architecture might have specific requirements around the allocation of CMA pages, add an arch hook that can disable allocations from MIGRATE_CMA, if the allocation was otherwise allowed. This will be used by arm64, which will put tag storage pages on the MIGRATE_CMA list, pages which have specific limitations. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> --- include/linux/pgtable.h | 7 +++++++ mm/page_alloc.c | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-)