lkml.org 
[lkml]   [2021]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 58/66] mm/mremap: Use vma_find() instead of vma linked list
Date
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
mm/mremap.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index b09e107cd18b..4ad39c985d04 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -713,7 +713,7 @@ static unsigned long move_vma(struct vm_area_struct *vma,
if (excess) {
vma->vm_flags |= VM_ACCOUNT;
if (split)
- vma->vm_next->vm_flags |= VM_ACCOUNT;
+ find_vma(mm, vma->vm_end)->vm_flags |= VM_ACCOUNT;
}

return new_addr;
@@ -869,9 +869,11 @@ static unsigned long mremap_to(unsigned long addr, unsigned long old_len,
static int vma_expandable(struct vm_area_struct *vma, unsigned long delta)
{
unsigned long end = vma->vm_end + delta;
+ struct vm_area_struct *next;
if (end < vma->vm_end) /* overflow */
return 0;
- if (vma->vm_next && vma->vm_next->vm_start < end) /* intersection */
+ next = find_vma(vma->vm_mm, vma->vm_end);
+ if (next && next->vm_start < end) /* intersection */
return 0;
if (get_unmapped_area(NULL, vma->vm_start, end - vma->vm_start,
0, MAP_FIXED) & ~PAGE_MASK)
--
2.30.2
\
 
 \ /
  Last update: 2021-12-01 15:39    [W:0.796 / U:0.824 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site