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x86: remove vma linked list walks

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Use the VMA iterator instead.

Link: https://lkml.kernel.org/r/20220906194824.2110408-36-Liam.Howlett@oracle.com
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-09-06 19:48:54 +00:00 committed by Andrew Morton
parent e7b6b990e5
commit a388462116
1 changed files with 5 additions and 4 deletions
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9
arch/x86/entry/vdso/vma.c
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@ -127,17 +127,17 @@ int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
{
struct mm_struct *mm = task->mm;
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
mmap_read_lock(mm);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for_each_vma(vmi, vma) {
unsigned long size = vma->vm_end - vma->vm_start;
if (vma_is_special_mapping(vma, &vvar_mapping))
zap_page_range(vma, vma->vm_start, size);
}
mmap_read_unlock(mm);
return 0;
}
#else
@ -354,6 +354,7 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
mmap_write_lock(mm);
/*
@ -363,7 +364,7 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr)
* We could search vma near context.vdso, but it's a slowpath,
* so let's explicitly check all VMAs to be completely sure.
*/
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for_each_vma(vmi, vma) {
if (vma_is_special_mapping(vma, &vdso_mapping) ||
vma_is_special_mapping(vma, &vvar_mapping)) {
mmap_write_unlock(mm);