diff mbox series

[v3,25/66] arch/arm64: Remove mmap linked list from vdso.

Message ID 20211005012959.1110504-26-Liam.Howlett@oracle.com (mailing list archive)
State New
Headers show
Series Introducing the Maple Tree | expand

Commit Message

Liam R. Howlett Oct. 5, 2021, 1:30 a.m. UTC 
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

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 a61fc4f989b3..57ea81fbe04b 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -136,10 +136,12 @@  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))
@@ -149,6 +151,7 @@  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;