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From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Russell King <linux@armlinux.org.uk>,
	 Huacai Chen <chenhuacai@kernel.org>,
	WANG Xuerui <kernel@xen0n.name>,
	 Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	 Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,  Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	 Kairui Song <kasong@tencent.com>, Qi Zheng <qi.zheng@linux.dev>,
	 Shakeel Butt <shakeel.butt@linux.dev>,
	Barry Song <baohua@kernel.org>,
	 Axel Rasmussen <axelrasmussen@google.com>,
	Yuanchu Xie <yuanchu@google.com>,  Wei Xu <weixugc@google.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	 David Hildenbrand <david@kernel.org>,
	Michal Hocko <mhocko@kernel.org>,
	 Lorenzo Stoakes <ljs@kernel.org>,
	Tianrui Zhao <zhaotianrui@loongson.cn>,
	 Bibo Mao <maobibo@loongson.cn>, Anup Patel <anup@brainfault.org>,
	 Atish Patra <atish.patra@linux.dev>,
	Paul Walmsley <pjw@kernel.org>,
	 Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	 Alexandre Ghiti <alex@ghiti.fr>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	 Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	 Thomas Gleixner <tglx@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,  Borislav Petkov <bp@alien8.de>,
	x86@kernel.org,  "H. Peter Anvin" <hpa@zytor.com>,
	"Liam R. Howlett" <liam@infradead.org>,
	 Vlastimil Babka <vbabka@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	 Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>,  Jonas Bonn <jonas@southpole.se>,
	 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
	 Stafford Horne <shorne@gmail.com>
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
Subject: [PATCH RFC v3 04/21] LoongArch: mm: define pud_leaf() only when PUD exists
Date: Wed, 02 Sep 2026 12:56:06 +0100	[thread overview]
Message-ID: <20260902-dummy_ptxp3-v3-4-5d8f5b17c25c@arm.com> (raw)
In-Reply-To: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com>

From: "David Hildenbrand (Arm)" <david@kernel.org>

In include/asm-generic/pgtable-nopmd.h, pud_leaf() is hardcoded
to return false as inline function, but it misses the "define pud_leaf
pud_leaf" part.

To prepare for fixing that, define pud_leaf() only when
__PAGETABLE_PMD_FOLDED isn't defined.

Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
---
 arch/loongarch/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index cf29a4c8ac59..8aee4fc27a26 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -630,7 +630,9 @@ static inline long pmd_protnone(pmd_t pmd)
 #endif /* CONFIG_ARCH_HAS_PTE_PROTNONE */
 
 #define pmd_leaf(pmd)		((pmd_val(pmd) & _PAGE_HUGE) != 0)
+#ifndef __PAGETABLE_PMD_FOLDED
 #define pud_leaf(pud)		((pud_val(pud) & _PAGE_HUGE) != 0)
+#endif
 
 /*
  * We provide our own get_unmapped area to cope with the virtual aliasing

-- 
2.43.0


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  parent reply	other threads:[~2026-09-02 11:57 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-02 11:56 [PATCH RFC v3 00/21] mm: change behavior of pXdp_get()/pXd_page() in compile-time folded pgtable Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 01/21] ARM: mm: make nommu pgd_t a scalar Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 02/21] ARM: mm: make 2-level " Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 03/21] ARM: mm: remove custom pgdp_get() Yeoreum Yun
2026-09-02 11:56 ` Yeoreum Yun [this message]
2026-09-02 11:56 ` [PATCH RFC v3 05/21] MIPS: mm: define pud_leaf() only when PUD exists Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 06/21] mm/pgtable: define (pgd|p4d|pud)_leaf() for folded page tables Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 07/21] mm/pgtable: define (pgd|p4d|pud)_offset_lockless() " Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 08/21] mm: vmscan: remove stack copy address of pud/pmd pass in walk_pud/pmd_range() Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 09/21] loongarch: kvm: remove stack copy address of pXd in pXd_offset() Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 10/21] riscv: " Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 11/21] riscv: mm: use proper set_pXd() for generic compile-time folded patable in vmalloc_fault() Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 12/21] mm/pgtable: redefine PGTABLE_LEVEL enum with ascend order from PGD Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 13/21] x86: mm: use pgtable_level enum in effective_prot_pXd() Yeoreum Yun
2026-09-02 20:48   ` Dave Hansen
2026-09-02 11:56 ` [PATCH RFC v3 14/21] x86: mm: carve out the generic compile-time folded pgtable case in effective_prot() Yeoreum Yun
2026-09-02 20:46   ` Dave Hansen
2026-09-02 11:56 ` [PATCH RFC v3 15/21] x86: mm: skip collapse_pud_page() when CONFIG_X86_DIRECT_GBPAGES disabled Yeoreum Yun
2026-09-02 15:38   ` Dave Hansen
2026-09-02 16:48     ` Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 16/21] openrisc/pgtable: drop __pmd_offset() Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 17/21] mm/pgtable: optimize pmdp_get() and friends for folded pagetable levels Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 18/21] mm/pgtable: catch abuse of folded dummy pgd_t/p4d_t/pud_t Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 19/21] mm/pgtable: disallow calling (pgd|p4d|pud)_page, pgd_page_vaddr() and (p4d|pud)_pgtable with dummy Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 20/21] mm/pgtable: disallow calling folded set_pgd/set_p4d/set_pud " Yeoreum Yun
2026-09-02 11:56 ` [PATCH RFC v3 21/21] Documentation: mm: clarify behaviour of compile-time folded page tables Yeoreum Yun

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