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V" , Nick Piggin , Peter Zijlstra , Russell King , Catalin Marinas , Brian Cain , WANG Xuerui , Geert Uytterhoeven , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Michael Ellerman , Naveen N Rao , Paul Walmsley , Albert Ou , Thomas Gleixner , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Andy Lutomirski , Bibo Mao , Baolin Wang , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Qi Zheng , Vishal Moola , "Aneesh Kumar K . V" , Kemeng Shi , Lance Yang , Peter Xu , Barry Song , linux-s390@vger.kernel.org Subject: [RFC PATCH 01/18] mm/pgtable: use ptdesc in pte_free_now/pte_free_defer Date: Tue, 30 Jul 2024 14:46:55 +0800 Message-ID: <20240730064712.3714387-2-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240730064712.3714387-1-alexs@kernel.org> References: <20240730064712.3714387-1-alexs@kernel.org> MIME-Version: 1.0 X-Mailman-Approved-At: Tue, 30 Jul 2024 20:25:54 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ryan Roberts , Alexandre Ghiti , Alex Shi , David Hildenbrand , Anup Patel , Hugh Dickins , Andrew Morton , Christophe Leroy , Samuel Holland , Palmer Dabbelt , Matthew Wilcox , Jisheng Zhang , Breno Leitao , Guo Ren , Alexander Gordeev , Gerald Schaefer , Josh Poimboeuf , Mike Rapoport , Oscar Salvador Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Alex Shi page table descriptor is splited from struct page, use it to replace struct page in right place. Signed-off-by: Alex Shi Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org Cc: Andrew Morton Cc: Matthew Wilcox Cc: David Hildenbrand --- mm/pgtable-generic.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 13a7705df3f8..2ce714f1dd15 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -238,18 +238,17 @@ pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long address, #ifndef pte_free_defer static void pte_free_now(struct rcu_head *head) { - struct page *page; + struct ptdesc *ptdesc; - page = container_of(head, struct page, rcu_head); - pte_free(NULL /* mm not passed and not used */, (pgtable_t)page); + ptdesc = container_of(head, struct ptdesc, pt_rcu_head); + pte_free(NULL /* mm not passed and not used */, (pgtable_t)ptdesc); } void pte_free_defer(struct mm_struct *mm, pgtable_t pgtable) { - struct page *page; + struct ptdesc *ptdesc = page_ptdesc(pgtable); - page = pgtable; - call_rcu(&page->rcu_head, pte_free_now); + call_rcu(&ptdesc->pt_rcu_head, pte_free_now); } #endif /* pte_free_defer */ #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ @@ -330,7 +329,7 @@ pte_t *pte_offset_map_nolock(struct mm_struct *mm, pmd_t *pmd, * kmapped if necessary (when CONFIG_HIGHPTE), and locked against concurrent * modification by software, with a pointer to that spinlock in ptlp (in some * configs mm->page_table_lock, in SPLIT_PTLOCK configs a spinlock in table's - * struct page). pte_unmap_unlock(pte, ptl) to unlock and unmap afterwards. + * struct ptdesc). pte_unmap_unlock(pte, ptl) to unlock and unmap afterwards. * * But it is unsuccessful, returning NULL with *ptlp unchanged, if there is no * page table at *pmd: if, for example, the page table has just been removed,