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Message-ID: <20220215144241.3812052-52-Liam.Howlett@oracle.com>
Date: Tue, 15 Feb 2022 14:43:22 +0000
From: Liam Howlett <liam.howlett@...cle.com>
To: "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v6 52/71] bpf: Remove VMA linked list
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
Use vma_next() and remove reference to the start of the linked list
Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
kernel/bpf/task_iter.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index d94696198ef8..9a0bbc808433 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -300,8 +300,8 @@ struct bpf_iter_seq_task_vma_info {
};
enum bpf_task_vma_iter_find_op {
- task_vma_iter_first_vma, /* use mm->mmap */
- task_vma_iter_next_vma, /* use curr_vma->vm_next */
+ task_vma_iter_first_vma, /* use find_vma() with addr 0 */
+ task_vma_iter_next_vma, /* use vma_next() with curr_vma */
task_vma_iter_find_vma, /* use find_vma() to find next vma */
};
@@ -401,10 +401,10 @@ task_vma_seq_get_next(struct bpf_iter_seq_task_vma_info *info)
switch (op) {
case task_vma_iter_first_vma:
- curr_vma = curr_task->mm->mmap;
+ curr_vma = find_vma(curr_task->mm, 0);
break;
case task_vma_iter_next_vma:
- curr_vma = curr_vma->vm_next;
+ curr_vma = find_vma(curr_task->mm, curr_vma->vm_end);
break;
case task_vma_iter_find_vma:
/* We dropped mmap_lock so it is necessary to use find_vma
@@ -418,7 +418,7 @@ task_vma_seq_get_next(struct bpf_iter_seq_task_vma_info *info)
if (curr_vma &&
curr_vma->vm_start == info->prev_vm_start &&
curr_vma->vm_end == info->prev_vm_end)
- curr_vma = curr_vma->vm_next;
+ curr_vma = find_vma(curr_task->mm, curr_vma->vm_end);
break;
}
if (!curr_vma) {
--
2.34.1
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