Commit af9de7eb authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by Linus Torvalds

clear_refs: introduce private struct for mm_walk

In the next patch the clear-refs-type will be required in
clear_refs_pte_range funciton, so prepare the walk->private to carry
this info.
Signed-off-by: default avatarPavel Emelyanov <xemul@parallels.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 040fa020
......@@ -695,10 +695,15 @@ enum clear_refs_types {
CLEAR_REFS_LAST,
};
struct clear_refs_private {
struct vm_area_struct *vma;
};
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
struct vm_area_struct *vma = walk->private;
struct clear_refs_private *cp = walk->private;
struct vm_area_struct *vma = cp->vma;
pte_t *pte, ptent;
spinlock_t *ptl;
struct page *page;
......@@ -753,13 +758,16 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
return -ESRCH;
mm = get_task_mm(task);
if (mm) {
struct clear_refs_private cp = {
};
struct mm_walk clear_refs_walk = {
.pmd_entry = clear_refs_pte_range,
.mm = mm,
.private = &cp,
};
down_read(&mm->mmap_sem);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
clear_refs_walk.private = vma;
cp.vma = vma;
if (is_vm_hugetlb_page(vma))
continue;
/*
......
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