On 12/1/21 15:30, Liam Howlett wrote:
> From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
>
> Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> ---
> fs/proc/base.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/fs/proc/base.c b/fs/proc/base.c
> index 13eda8de2998..ea17ee988158 100644
> --- a/fs/proc/base.c
> +++ b/fs/proc/base.c
> @@ -2323,6 +2323,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
> GENRADIX(struct map_files_info) fa;
> struct map_files_info *p;
> int ret;
> + MA_STATE(mas, NULL, 0, 0);
>
> genradix_init(&fa);
>
> @@ -2350,6 +2351,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
> }
>
> nr_files = 0;
> + mas.tree = &mm->mm_mt;
>
> /*
> * We need two passes here:
> @@ -2361,7 +2363,8 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
> * routine might require mmap_lock taken in might_fault().
> */
>
> - for (vma = mm->mmap, pos = 2; vma; vma = vma->vm_next) {
> + pos = 2;
> + mas_for_each(&mas, vma, ULONG_MAX) {
> if (!vma->vm_file)
> continue;
> if (++pos <= ctx->pos)
