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

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

fs/proc/task_mmu.c

+10 −2
Original line number Diff line number Diff line
@@ -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;

			/*