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authorPavel Emelyanov <xemul@parallels.com>2013-07-03 15:01:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:25 -0700
commitaf9de7eb180fa9b74c2cdc256349304a58c63c02 (patch)
treee67c5d5b89ffff70a96d45b3d95cb5f9df39e65b /fs
parent040fa02077de01c7e08fa75be6125e4ca5636011 (diff)
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: 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>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/task_mmu.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index dad0809db551..ef6f6c62dfee 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -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;
/*