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bpf: remove VMA linked list

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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 <Liam.Howlett@Oracle.com>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2022-09-06 19:48:59 +00:00 committed by Andrew Morton
parent fa5e587679
commit becc8cdb6c
1 changed files with 5 additions and 5 deletions
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10
kernel/bpf/task_iter.c
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@ -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) {