From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793618535; b=o/HP0G+Ju91Ayqa8kgx8t/WYZ9xvZzzW2N5XKy8FcUoYU4bASYaohEXLBxvnjbI6S6E2 XxE6I7XjfgXEXtDNtNBJEbJ3hHhiU6pJdtQ6Xz/hLQjAEiQe9iueti4+t9kSqYHUAAQka +bH55Ihv+av1lBWpz8bZG8+dAhd/IUdyvtQ52SRXnCss8wCuaOlYkw90fBRch9N42sJX1 8hwMui/qS3JpQBuqY991Pq1QGX3Nbqb7YL4/F70Z1H8eQr2YDNktcfeWDCQZuIKiNYkkl 3h0n22DsgZvIAf3ERpCqk8xnDoCnhLtKY4EnSCUbUI+Y01LTEvK3qQ/+ndkhE1whHzg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793618535; h=DMARC-Filter:Received:Received:DKIM-Signature:From:Date:Subject: MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id: References:In-Reply-To:To:Cc:X-Mailer:X-Developer-Signature: X-Developer-Key; bh=1XXfVIkNP4nITGpfyLSUIpM9B8UBbVvkEA7ohODjLRw=; b=N4+PealmYTRAikZANnMHtU83w+xRJSUW+BIuJzFBIKCym9T+zDhKzh5lgCPJWZ6u5qE4 aofWNClTx0lnWHf5B2Payc4AlP90EhOyoPVWddTnENP72K9blKY9eA+q7KmCsp3Bya0aH hVqtPoNLl+wW369sSYTQtCAR+AKJc7xFLY2UrYOry740eILP9YLZODtcIKGt+RIlY/GUv J3igYmud0GOz9lmeYvTLX+J5eTmE+CPokN3pdP57E803n+Lwo43+grtyFp9ebf2LUQlTF GX/fpfqL0b19BARALIR4BP+ZWi0EgX98HVkT7CZyZx9Wuqeq5gWB+/WeAzYW05zElFQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=A7rQE586; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8829560A262A; Mon, 2 Nov 2026 11:22:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 8829560A262A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=A7rQE586 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C90D9293B; Mon, 2 Nov 2026 03:22:10 -0800 (PST) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D99E73F632; Mon, 2 Nov 2026 03:22:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793618533; bh=evfeL7lk1yM+NSCKYrKsUpK8FtfFqKH2c2v1uANMiZA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=A7rQE586SxmeYhdbuDjgGojrf+yFdXKkVJvIWE3/CkvAh47B/hi7pieq8pgJx6OPd 7+IdQ9YxhSeIZpcu39Tq98FmLu1Q3ge8+e61N66fuaQUSiCZLJB7SxbfiAp/g9FEqC pD/C97hYRDBX9CkJO435UP1+7vyxZpzRkF237Vvg= From: Yeoreum Yun Date: Mon, 02 Nov 2026 11:21:19 +0000 Subject: [PATCH RESEND v2 06/21] mm/pgtable: define (pgd|p4d|pud)_leaf() for folded page tables X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261102-dummy_ptxp3-v2-6-78840b2ec73c@arm.com> References: <20261102-dummy_ptxp3-v2-0-78840b2ec73c@arm.com> In-Reply-To: <20261102-dummy_ptxp3-v2-0-78840b2ec73c@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2651; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=MsUi6fKiy4C8DH1qxUfB7PhJ8/xMmbWjYscC+NJ7HZ8=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBq6HIxIVd8yfHE+3CA9LTpZi1gUI+XMCzgs5U2Q BHJBi3iXj+JAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCauhyMQAKCRBt1cPRWsUx M/V2C/9ItyCxgxlMh10fHR69tVgw9EuphM40QYD/mSrn4nLbxqXwGeoRCXJD/CQZjbzhVqNLqD8 4pI+P8VaiZD1ROaf98yDqlm38MdDfJo/nXweMu2XCSuy8bvJOZ5akdNLIqOCNL/Kky/4vAvfA7y g/DN2CQi8iHcZmgFZENpatEkLXDT+irkdH/T8momUPL2iU/gMe9+PBe83/sjStUInekkPY+48fS tQ4YbgN0JI0jsnh5HfL7yHY0zHyLhvoIlmUPykZRIofr+KodLXQYFHAKOkD2khVIs/r2bFJxKJM 7EZ9zMN52ptWFsHpkIIDhVoEnRhnj2vRlH6U7Y8kV9ZSGk2CzFCTZuWrT3cGyiZ4sRJ2z/gLRS+ DXMtq/JtOP08ZaADSQRymmkYRKA9PLkrAtBZXZKwEO/gg81uxE4KT+wj8pXddgbXPnOWNxmpGA0 MxTCMq+1KtHR5HFt8aTkW7OiLozCLtwsA62FVhYXV48+piX5IjzAgVxuzgBp34DGCh8VI= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 From: "David Hildenbrand (Arm)" Define (pgd|p4d|pud)_leaf(), hard-coding it to "false". Note that it's missed to define pud_leaf() before, allowing architectures to unknowingly overwrite it. Still use static inline functions (type checking), and while at it, just use "bool" as a return value. Signed-off-by: David Hildenbrand (Arm) --- include/asm-generic/pgtable-nop4d.h | 3 +++ include/asm-generic/pgtable-nopmd.h | 3 ++- include/asm-generic/pgtable-nopud.h | 3 +++ 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/include/asm-generic/pgtable-nop4d.h b/include/asm-generic/pgtable-nop4d.h index 1cf739ee38aa1..c6a5a43899b50 100644 --- a/include/asm-generic/pgtable-nop4d.h +++ b/include/asm-generic/pgtable-nop4d.h @@ -22,6 +22,9 @@ static inline int pgd_none(pgd_t pgd) { return 0; } static inline int pgd_bad(pgd_t pgd) { return 0; } static inline int pgd_present(pgd_t pgd) { return 1; } static inline void pgd_clear(pgd_t *pgd) { } +static inline bool pgd_leaf(pgd_t pgd) { return false; } +#define pgd_leaf pgd_leaf +#define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd)) #define pgd_populate(mm, pgd, p4d) do { } while (0) #define pgd_populate_safe(mm, pgd, p4d) do { } while (0) diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h index ff4235cf84d77..4e5aaf253b6a5 100644 --- a/include/asm-generic/pgtable-nopmd.h +++ b/include/asm-generic/pgtable-nopmd.h @@ -31,7 +31,8 @@ static inline int pud_none(pud_t pud) { return 0; } static inline int pud_bad(pud_t pud) { return 0; } static inline int pud_present(pud_t pud) { return 1; } static inline int pud_user(pud_t pud) { return 0; } -static inline int pud_leaf(pud_t pud) { return 0; } +static inline bool pud_leaf(pud_t pud) { return false; } +#define pud_leaf pud_leaf static inline void pud_clear(pud_t *pud) { } #define pud_populate(mm, pmd, pte) do { } while (0) diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h index eedee8e3ad68f..6c9bca78047c4 100644 --- a/include/asm-generic/pgtable-nopud.h +++ b/include/asm-generic/pgtable-nopud.h @@ -29,6 +29,9 @@ static inline int p4d_none(p4d_t p4d) { return 0; } static inline int p4d_bad(p4d_t p4d) { return 0; } static inline int p4d_present(p4d_t p4d) { return 1; } static inline void p4d_clear(p4d_t *p4d) { } +static inline bool p4d_leaf(p4d_t p4d) { return false; } +#define p4d_leaf p4d_leaf +#define pud_ERROR(pud) (p4d_ERROR((pud).p4d)) #define p4d_populate(mm, p4d, pud) do { } while (0) #define p4d_populate_safe(mm, p4d, pud) do { } while (0) -- 2.43.0