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clear_refs: introduce private struct for mm_walk

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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: Pavel 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Emelyanov
2013-07-03 15:01:18 -07:00
committed by Linus Torvalds
parent 040fa02077
commit af9de7eb18
1 changed files with 10 additions and 2 deletions
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12
fs/proc/task_mmu.c
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@@ -695,10 +695,15 @@ enum clear_refs_types {
CLEAR_REFS_LAST, CLEAR_REFS_LAST,
}; };
struct clear_refs_private {
struct vm_area_struct *vma;
};
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk) 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; pte_t *pte, ptent;
spinlock_t *ptl; spinlock_t *ptl;
struct page *page; struct page *page;
@@ -753,13 +758,16 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
return -ESRCH; return -ESRCH;
mm = get_task_mm(task); mm = get_task_mm(task);
if (mm) { if (mm) {
struct clear_refs_private cp = {
};
struct mm_walk clear_refs_walk = { struct mm_walk clear_refs_walk = {
.pmd_entry = clear_refs_pte_range, .pmd_entry = clear_refs_pte_range,
.mm = mm, .mm = mm,
.private = &cp,
}; };
down_read(&mm->mmap_sem); down_read(&mm->mmap_sem);
for (vma = mm->mmap; vma; vma = vma->vm_next) { for (vma = mm->mmap; vma; vma = vma->vm_next) {
clear_refs_walk.private = vma; cp.vma = vma;
if (is_vm_hugetlb_page(vma)) if (is_vm_hugetlb_page(vma))
continue; continue;
/* /*