From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-2.mimecast.com ([207.211.31.81]:20344 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726142AbgDJTQU (ORCPT ); Fri, 10 Apr 2020 15:16:20 -0400 Received: by mail-qv1-f69.google.com with SMTP id v88so2390745qvv.6 for ; Fri, 10 Apr 2020 12:16:17 -0700 (PDT) Date: Fri, 10 Apr 2020 15:16:13 -0400 From: Peter Xu Subject: Re: [PATCH v2 1/4] hugetlbfs: add arch_hugetlb_valid_size Message-ID: <20200410191613.GD3172@xz-x1> References: <20200401183819.20647-1-mike.kravetz@oracle.com> <20200401183819.20647-2-mike.kravetz@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200401183819.20647-2-mike.kravetz@oracle.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Mike Kravetz Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-doc@vger.kernel.org, Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , "David S . Miller" , Thomas Gleixner , Ingo Molnar , Dave Hansen , Jonathan Corbet , Longpeng , Christophe Leroy , Mina Almasry , Andrew Morton On Wed, Apr 01, 2020 at 11:38:16AM -0700, Mike Kravetz wrote: > diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h > index 2eb6c234d594..81606223494f 100644 > --- a/arch/arm64/include/asm/hugetlb.h > +++ b/arch/arm64/include/asm/hugetlb.h > @@ -59,6 +59,8 @@ extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr, > extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, > pte_t *ptep, pte_t pte, unsigned long sz); > #define set_huge_swap_pte_at set_huge_swap_pte_at > +bool __init arch_hugetlb_valid_size(unsigned long size); > +#define arch_hugetlb_valid_size arch_hugetlb_valid_size Sorry for chimming in late. Since we're working on removing arch-dependent codes after all.. I'm thinking whether we can define arch_hugetlb_valid_size() once in the common header (e.g. linux/hugetlb.h), then in mm/hugetlb.c: bool __init __attribute((weak)) arch_hugetlb_valid_size(unsigned long size) { return size == HPAGE_SIZE; } We can simply redefine arch_hugetlb_valid_size() in arch specific C files where we want to override the default. Would that be slightly cleaner? Thanks, -- Peter Xu