[PATCH v2 43/70] fs/proc/base: Use maple tree iterators in place of linked list

[Liam R. Howlett]

Signed-off-by: Liam R. Howlett <liam.howl...@oracle.com>
---
 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 b362523a9829a..0a7d4d3d6ae9b 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2316,6 +2316,7 @@ 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);
 
@@ -2343,6 +2344,7 @@ proc_map_files_readdir(struct file *file, struct 
dir_context *ctx)
        }
 
        nr_files = 0;
+       mas.tree = &mm->mm_mt;
 
        /*
         * We need two passes here:
@@ -2354,7 +2356,8 @@ 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)
-- 
2.28.0