lkml.org 
[lkml]   [2022]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v14 59/70] mm/mremap: use vma_find_intersection() instead of vma linked list
Date
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Using the vma_find_intersection() call allows for cleaner code and
removes linked list users in preparation of the linked list removal.

Also remove one user of the linked list at the same time in favour of
find_vma().

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
---
mm/mremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index e0fba9004246..8644ff278f02 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -716,7 +716,7 @@ 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;
@@ -866,9 +866,10 @@ 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;
+
if (end < vma->vm_end) /* overflow */
return 0;
- if (vma->vm_next && vma->vm_next->vm_start < end) /* intersection */
+ if (find_vma_intersection(vma->vm_mm, vma->vm_end, end))
return 0;
if (get_unmapped_area(NULL, vma->vm_start, end - vma->vm_start,
0, MAP_FIXED) & ~PAGE_MASK)
--
2.35.1
\
 
 \ /
  Last update: 2022-09-06 21:55    [W:0.405 / U:0.216 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site