diff mbox series

[v2,28/70] arch/arm64: Remove mmap linked list from vdso.

Message ID	20210112161240.2024684-29-Liam.Howlett@Oracle.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=wefk=GP=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 759992222B From: "Liam R. Howlett" <Liam.Howlett@Oracle.com> To: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Andrew Morton <akpm@google.com>, Song Liu <songliubraving@fb.com>, Davidlohr Bueso <dave@stgolabs.net>, "Paul E . McKenney" <paulmck@kernel.org>, Matthew Wilcox <willy@infradead.org>, Jerome Glisse <jglisse@redhat.com>, David Rientjes <rientjes@google.com>, Axel Rasmussen <axelrasmussen@google.com>, Suren Baghdasaryan <surenb@google.com>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@surriel.com>, Peter Zijlstra <peterz@infradead.org> Subject: [PATCH v2 28/70] arch/arm64: Remove mmap linked list from vdso. Date: Tue, 12 Jan 2021 11:11:58 -0500 Message-Id: <20210112161240.2024684-29-Liam.Howlett@Oracle.com> In-Reply-To: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> References: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	RFC mm: Introducing the Maple Tree \| expand [v2,00/70] RFC mm: Introducing the Maple Tree [v2,01/70] radix tree test suite: Enhancements for Maple Tree [v2,02/70] radix tree test suite: Add support for fallthrough attribute [v2,03/70] radix tree test suite: Add support for kmem_cache_free_bulk [v2,04/70] radix tree test suite: Add keme_cache_alloc_bulk() support [v2,05/70] Maple Tree: Add new data structure [v2,06/70] mm: Start tracking VMAs with maple tree [v2,07/70] mm/mmap: Introduce unlock_range() for code cleanup [v2,08/70] mm/mmap: Change find_vma() to use the maple tree [v2,09/70] mm/mmap: Change find_vma_prev() to use maple tree [v2,10/70] mm/mmap: Change unmapped_area and unmapped_area_topdown to use maple tree [v2,11/70] kernel/fork: Convert dup_mmap to use maple tree [v2,12/70] mm: Remove rb tree. [v2,13/70] mm/gup: Add mm_populate_vma() for use when the vma is known [v2,14/70] mm/mmap: Change do_brk_flags() to expand existing VMA and add do_brk_munmap() [v2,15/70] mm/mmap: Change vm_brk_flags() to use mm_populate_vma() [v2,16/70] mm: Move find_vma_intersection to mmap.c and change implementation to maple tree. [v2,17/70] mm/mmap: Change mmap_region to use maple tree state [v2,18/70] mm/mmap: Drop munmap_vma_range() [v2,19/70] mm: Remove vmacache [v2,20/70] mm/mmap: Change __do_munmap() to avoid unnecessary lookups. [v2,21/70] mm/mmap: Move mmap_region() below do_munmap() [v2,22/70] mm/mmap: Add do_mas_munmap() and wraper for __do_munmap() [v2,23/70] mmap: Use find_vma_intersection in do_mmap() for overlap [v2,24/70] mmap: Remove __do_munmap() in favour of do_mas_munmap() [v2,25/70] mm/mmap: Change do_brk_munmap() to use do_mas_align_munmap() [v2,26/70] mmap: make remove_vma_list() inline [v2,27/70] mm: Introduce vma_next() and vma_prev() [v2,28/70] arch/arm64: Remove mmap linked list from vdso. [v2,29/70] arch/parsic: Remove mmap linked list from kernel/cache [v2,30/70] arch/powerpc: Remove mmap linked list from mm/book2s32/tlb [v2,31/70] arch/powerpc: Remove mmap linked list from mm/book2s32/subpage_prot [v2,32/70] arch/powerpc: Optimize cell spu task sync. [v2,33/70] arch/s390: Use maple tree iterators instead of linked list. [v2,34/70] arch/um: Use maple tree iterators instead of linked list [v2,35/70] arch/x86: Use maple tree iterators for vdso/vma [v2,36/70] arch/xtensa: Use maple tree iterators for unmapped area [v2,37/70] drivers/misc/cxl: Use maple tree iterators for cxl_prefault_vma() [v2,38/70] drivers/oprofile: Lookup address in tree instead of linked list. [v2,39/70] drivers/tee/optee: Use maple tree iterators for __check_mem_type() [v2,40/70] fs/binfmt_elf: Use maple tree iterators for fill_files_note() [v2,41/70] fs/coredump: Use maple tree iterators in place of linked list [v2,42/70] fs/exec: Use vma_next() instead of linked list [v2,43/70] fs/proc/base: Use maple tree iterators in place of linked list [v2,44/70] fs/proc/task_mmu: Stop using linked list and highest_vm_end [v2,45/70] fs/userfaultfd: Stop using vma linked list. [v2,46/70] ipc/shm: Stop using the vma linked list [v2,47/70] kernel/acct: Use maple tree iterators instead of linked list [v2,48/70] kernel/events/core: Use maple tree iterators instead of linked list [v2,49/70] kernel/events/uprobes: Use maple tree iterators instead of linked list [v2,50/70] kernel/sched/fair: Use maple tree iterators instead of linked list [v2,51/70] kernel/sys: Use maple tree iterators instead of linked list [v2,52/70] mm/gup: Use maple tree navigation instead of linked list [v2,53/70] mm/huge_memory: Use vma_next() instead of vma linked list [v2,54/70] mm/khugepaged: Use maple tree iterators instead of vma linked list [v2,55/70] mm/ksm: Use maple tree iterators instead of vma linked list [v2,56/70] mm/madvise: Use vma_next instead of vma linked list [v2,57/70] mm/memcontrol: Stop using mm->highest_vm_end [v2,58/70] mm/mempolicy: Use maple tree iterators instead of vma linked list [v2,59/70] mm/mlock: Use maple tree iterators instead of vma linked list [v2,60/70] mm/mprotect: Use maple tree navigation instead of vma linked list [v2,61/70] mm/mremap: Use vma_next() instead of vma linked list [v2,62/70] mm/msync: Use vma_next() instead of vma linked list [v2,63/70] mm/nommu: Use maple tree iterators instead of vma linked list [v2,64/70] mm/oom_kill: Use maple tree iterators instead of vma linked list [v2,65/70] mm/pagewalk: Use vma_next() instead of vma linked list [v2,66/70] mm/swapfile: Use maple tree iterator instead of vma linked list [v2,67/70] mm/nommu: Stop inserting into the vma linked list [v2,68/70] mm/util: Remove __vma_link_list() and __vma_unlink_list() [v2,69/70] mm: Remove vma linked list. [v2,70/70] mm/mmap: Convert __insert_vm_struct to use mas, convert vma_link to use vma_mas_link()

Commit Message

Liam R. Howlett Jan. 12, 2021, 4:11 p.m. UTC

Start using the maple tree

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 arch/arm64/kernel/vdso.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff mbox series

Patch

diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index debb8995d57fb..caa7d8f6b99db 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -144,10 +144,12 @@  int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
 {
 	struct mm_struct *mm = task->mm;
 	struct vm_area_struct *vma;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
 	mmap_read_lock(mm);
 
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+	rcu_read_lock();
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		unsigned long size = vma->vm_end - vma->vm_start;
 
 		if (vma_is_special_mapping(vma, vdso_info[VDSO_ABI_AA64].dm))
@@ -157,6 +159,7 @@  int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
 			zap_page_range(vma, vma->vm_start, size);
 #endif
 	}
+	rcu_read_unlock();
 
 	mmap_read_unlock(mm);
 	return 0;