linux-kernel - [PATCH v2 49/70] kernel/events/uprobes: Use maple tree iterators instead of linked list

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Message-Id: <20210112161240.2024684-50-Liam.Howlett@Oracle.com>
Date:   Tue, 12 Jan 2021 11:12:19 -0500
From:   "Liam R. Howlett" <Liam.Howlett@...cle.com>
To:     maple-tree@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...gle.com>, Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jerome Glisse <jglisse@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v2 49/70] kernel/events/uprobes: Use maple tree iterators instead of linked list

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 kernel/events/uprobes.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 00b0358739ab3..b0aa05be2a61d 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -356,8 +356,9 @@ static struct vm_area_struct *
 find_ref_ctr_vma(struct uprobe *uprobe, struct mm_struct *mm)
 {
 	struct vm_area_struct *tmp;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
-	for (tmp = mm->mmap; tmp; tmp = tmp->vm_next)
+	mas_for_each(&mas, tmp, ULONG_MAX)
 		if (valid_ref_ctr_vma(uprobe, tmp))
 			return tmp;
 
@@ -1239,9 +1240,10 @@ static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm)
 {
 	struct vm_area_struct *vma;
 	int err = 0;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
 	mmap_read_lock(mm);
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		unsigned long vaddr;
 		loff_t offset;
 
@@ -1990,8 +1992,9 @@ bool uprobe_deny_signal(void)
 static void mmf_recalc_uprobes(struct mm_struct *mm)
 {
 	struct vm_area_struct *vma;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		if (!valid_vma(vma, false))
 			continue;
 		/*
-- 
2.28.0