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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fypoJlnYx1WM9LUZPlxzbewydDqBg7qQn8k61MYWm0J/mlRh7a7H8DqUhaOBte4DX TeryiXPOVIXihT08YvxL3ggERzQkj+AYv2G9eIm44I+OKgIcdVbkYIR+hKiX7tyiYL EO/9qQEd//kdJLokCKezxf+tnz/DQCM3Aei1wj2c= From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Catalin Marinas , Will Deacon , Ryan Roberts , Mark Rutland , Lorenzo Stoakes , Andrew Morton , David Hildenbrand , Mike Rapoport , Linu Cherian , Usama Arif , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC V2 11/14] arm64/mm: Override read-write accessors for vm_page_prot Date: Wed, 13 May 2026 10:15:44 +0530 Message-ID: <20260513044547.4128549-12-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260513044547.4128549-1-anshuman.khandual@arm.com> References: <20260513044547.4128549-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: C1A1A40006 X-Rspam-User: X-Stat-Signature: wfu4d796kes1x57ogufbcan3cn517ct5 X-HE-Tag: 1778647649-636760 X-HE-Meta: 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 EUsly8uX TAnZW6EfrWNd/IZSgXJX/Gq70dt6j9OJDYaHyyp2euE3ypwM6EIWFNnm525qOoiF0sB056bPHRP/A29u/OfpnBu7B0ewh0LHjdcJMbyo+mBxKaI6dKhBq2t7wAc4cvi1bnbF96Yqy26ZNZ09oJGUJgP1+qJk0pzXPI74blpbvwSl2EgQIjOeWNRFRFE0R0ovSckAPiFSAX13fT/Wi8Y0DPC+hXY+cquXdaBQx7u9wKxDpcXMUyCGcjOyg1fy6KKeiql6m3cbvNMaOEgjVcnxb8fkV5l8xFBQHasm8t9X/WsbCSLk5aT7ojwU9mQ363ERT+QDCyB0MNKXBrRIBYxhAzB1D1LDfF4pOsKRn6uqbyDb9tQZQwo+frOjy9Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Override pgprot_[read|write]() accessors using pxxval_[get|set]() providing required single copy atomic operation for vma->vm_page_prot. Cc: Catalin Marinas Cc: Will Deacon Cc: Ryan Roberts Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- Changes in RFC V2: - Dropped _once from pgprot_read/write() per Mike - Renamed all ptdesc_ instances as pxxval_ instead arch/arm64/include/asm/pgtable.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 4065b68e8d79..c9457d133ae9 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -122,6 +122,18 @@ static inline pgd_t pgdp_get(pgd_t *pgdp) return pxxval_get(*pgdp); } +#define pgprot_read pgprot_read +static inline pgprot_t pgprot_read(pgprot_t *prot) +{ + return pxxval_get(*prot); +} + +#define pgprot_write pgprot_write +static inline void pgprot_write(pgprot_t *prot, pgprot_t val) +{ + pxxval_set(*prot, val); +} + #ifdef CONFIG_TRANSPARENT_HUGEPAGE #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE -- 2.43.0