From becc8cdb6cb28d9fd3ecf890d1d6e59118a6a53d Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Tue, 6 Sep 2022 19:48:59 +0000 Subject: bpf: remove VMA linked list Use vma_next() and remove reference to the start of the linked list Link: https://lkml.kernel.org/r/20220906194824.2110408-51-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Tested-by: Yu Zhao Cc: Catalin Marinas Cc: David Hildenbrand Cc: David Howells Cc: Davidlohr Bueso Cc: "Matthew Wilcox (Oracle)" Cc: SeongJae Park Cc: Sven Schnelle Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton --- kernel/bpf/task_iter.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'kernel/bpf/task_iter.c') diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c index 8c921799def4..1c8debd42dc9 100644 --- a/kernel/bpf/task_iter.c +++ b/kernel/bpf/task_iter.c @@ -299,8 +299,8 @@ 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 */ }; @@ -400,10 +400,10 @@ again: 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 @@ -417,7 +417,7 @@ again: 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) { -- cgit v1.2.3-58-ga151