From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Mon, 4 Jan 2021 19:44:45 +0000 (-0500)
Subject: fs/coredump: Use maple tree iterators in place of linked list
X-Git-Tag: howlett/maple_spf/20210128~29
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=143672eee07795c53cad8f2a6dcd11a2fbd24f54;p=users%2Fjedix%2Flinux-maple.git

fs/coredump: Use maple tree iterators in place of linked list

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/fs/coredump.c b/fs/coredump.c
index a2f6ecc8e345..eeea0c76eee4 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -1038,10 +1038,10 @@ whole:
 	return vma->vm_end - vma->vm_start;
 }
 
-static struct vm_area_struct *first_vma(struct task_struct *tsk,
+static struct vm_area_struct *first_vma(struct mm_struct *mm,
 					struct vm_area_struct *gate_vma)
 {
-	struct vm_area_struct *ret = tsk->mm->mmap;
+	struct vm_area_struct *ret = find_vma(mm, 0);
 
 	if (ret)
 		return ret;
@@ -1052,12 +1052,13 @@ static struct vm_area_struct *first_vma(struct task_struct *tsk,
  * Helper function for iterating across a vma list.  It ensures that the caller
  * will visit `gate_vma' prior to terminating the search.
  */
-static struct vm_area_struct *next_vma(struct vm_area_struct *this_vma,
+static struct vm_area_struct *next_vma(struct mm_struct *mm,
+				       struct vm_area_struct *this_vma,
 				       struct vm_area_struct *gate_vma)
 {
 	struct vm_area_struct *ret;
 
-	ret = this_vma->vm_next;
+	ret = vma_next(mm, this_vma);
 	if (ret)
 		return ret;
 	if (this_vma == gate_vma)
@@ -1095,8 +1096,8 @@ int dump_vma_snapshot(struct coredump_params *cprm, int *vma_count,
 		return -ENOMEM;
 	}
 
-	for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;
-			vma = next_vma(vma, gate_vma), i++) {
+	for (i = 0, vma = first_vma(mm, gate_vma); vma != NULL;
+			vma = next_vma(mm, vma, gate_vma), i++) {
 		struct core_vma_metadata *m = (*vma_meta) + i;
 
 		m->start = vma->vm_start;