i_mmap_lock_read(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, index, index) {
- unsigned long address, start, end;
+ struct mmu_notifier_range range;
+ unsigned long address;
cond_resched();
* call mmu_notifier_invalidate_range_start() on our behalf
* before taking any lock.
*/
- if (follow_pte_pmd(vma->vm_mm, address, &start, &end, &ptep, &pmdp, &ptl))
+ if (follow_pte_pmd(vma->vm_mm, address, &range,
+ &ptep, &pmdp, &ptl))
continue;
/*
pte_unmap_unlock(ptep, ptl);
}
- mmu_notifier_invalidate_range_end(vma->vm_mm, start, end);
+ mmu_notifier_invalidate_range_end(&range);
}
i_mmap_unlock_read(mapping);
}
return -ESRCH;
mm = get_task_mm(task);
if (mm) {
+ struct mmu_notifier_range range;
struct clear_refs_private cp = {
.type = type,
};
downgrade_write(&mm->mmap_sem);
break;
}
- mmu_notifier_invalidate_range_start(mm, 0, -1);
+
+ mmu_notifier_range_init(&range, mm, 0, -1UL);
+ mmu_notifier_invalidate_range_start(&range);
}
walk_page_range(0, mm->highest_vm_end, &clear_refs_walk);
if (type == CLEAR_REFS_SOFT_DIRTY)
- mmu_notifier_invalidate_range_end(mm, 0, -1);
+ mmu_notifier_invalidate_range_end(&range);
tlb_finish_mmu(&tlb, 0, -1);
up_read(&mm->mmap_sem);
out_mm:
void *private;
};
+struct mmu_notifier_range;
+
int walk_page_range(unsigned long addr, unsigned long end,
struct mm_walk *walk);
int walk_page_vma(struct vm_area_struct *vma, struct mm_walk *walk);
int copy_page_range(struct mm_struct *dst, struct mm_struct *src,
struct vm_area_struct *vma);
int follow_pte_pmd(struct mm_struct *mm, unsigned long address,
- unsigned long *start, unsigned long *end,
- pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp);
+ struct mmu_notifier_range *range,
+ pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp);
int follow_pfn(struct vm_area_struct *vma, unsigned long address,
unsigned long *pfn);
int follow_phys(struct vm_area_struct *vma, unsigned long address,
unsigned long address);
extern void __mmu_notifier_change_pte(struct mm_struct *mm,
unsigned long address, pte_t pte);
-extern int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- unsigned long start, unsigned long end,
- bool blockable);
-extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
- unsigned long start, unsigned long end,
+extern int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *r);
+extern void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *r,
bool only_end);
extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
unsigned long start, unsigned long end);
__mmu_notifier_change_pte(mm, address, pte);
}
-static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline void
+mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
- if (mm_has_notifiers(mm))
- __mmu_notifier_invalidate_range_start(mm, start, end, true);
+ if (mm_has_notifiers(range->mm)) {
+ range->blockable = true;
+ __mmu_notifier_invalidate_range_start(range);
+ }
}
-static inline int mmu_notifier_invalidate_range_start_nonblock(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline int
+mmu_notifier_invalidate_range_start_nonblock(struct mmu_notifier_range *range)
{
- if (mm_has_notifiers(mm))
- return __mmu_notifier_invalidate_range_start(mm, start, end, false);
+ if (mm_has_notifiers(range->mm)) {
+ range->blockable = false;
+ return __mmu_notifier_invalidate_range_start(range);
+ }
return 0;
}
-static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline void
+mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range)
{
- if (mm_has_notifiers(mm))
- __mmu_notifier_invalidate_range_end(mm, start, end, false);
+ if (mm_has_notifiers(range->mm))
+ __mmu_notifier_invalidate_range_end(range, false);
}
-static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline void
+mmu_notifier_invalidate_range_only_end(struct mmu_notifier_range *range)
{
- if (mm_has_notifiers(mm))
- __mmu_notifier_invalidate_range_end(mm, start, end, true);
+ if (mm_has_notifiers(range->mm))
+ __mmu_notifier_invalidate_range_end(range, true);
}
static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
__mmu_notifier_mm_destroy(mm);
}
+
+static inline void mmu_notifier_range_init(struct mmu_notifier_range *range,
+ struct mm_struct *mm,
+ unsigned long start,
+ unsigned long end)
+{
+ range->mm = mm;
+ range->start = start;
+ range->end = end;
+}
+
#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
({ \
int __young; \
#else /* CONFIG_MMU_NOTIFIER */
+struct mmu_notifier_range {
+ unsigned long start;
+ unsigned long end;
+};
+
+static inline void _mmu_notifier_range_init(struct mmu_notifier_range *range,
+ unsigned long start,
+ unsigned long end)
+{
+ range->start = start;
+ range->end = end;
+}
+
+#define mmu_notifier_range_init(range, mm, start, end) \
+ _mmu_notifier_range_init(range, start, end)
+
+
static inline int mm_has_notifiers(struct mm_struct *mm)
{
return 0;
{
}
-static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline void
+mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
}
-static inline int mmu_notifier_invalidate_range_start_nonblock(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline int
+mmu_notifier_invalidate_range_start_nonblock(struct mmu_notifier_range *range)
{
return 0;
}
-static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline
+void mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range)
{
}
-static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static inline void
+mmu_notifier_invalidate_range_only_end(struct mmu_notifier_range *range)
{
}
.address = addr,
};
int err;
- /* For mmu_notifiers */
- const unsigned long mmun_start = addr;
- const unsigned long mmun_end = addr + PAGE_SIZE;
+ struct mmu_notifier_range range;
struct mem_cgroup *memcg;
+ mmu_notifier_range_init(&range, mm, addr, addr + PAGE_SIZE);
+
VM_BUG_ON_PAGE(PageTransHuge(old_page), old_page);
err = mem_cgroup_try_charge(new_page, vma->vm_mm, GFP_KERNEL, &memcg,
/* For try_to_free_swap() and munlock_vma_page() below */
lock_page(old_page);
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_start(&range);
err = -EAGAIN;
if (!page_vma_mapped_walk(&pvmw)) {
mem_cgroup_cancel_charge(new_page, memcg, false);
err = 0;
unlock:
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
unlock_page(old_page);
return err;
}
int i;
vm_fault_t ret = 0;
struct page **pages;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
pages = kmalloc_array(HPAGE_PMD_NR, sizeof(struct page *),
GFP_KERNEL);
cond_resched();
}
- mmun_start = haddr;
- mmun_end = haddr + HPAGE_PMD_SIZE;
- mmu_notifier_invalidate_range_start(vma->vm_mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, vma->vm_mm, haddr,
+ haddr + HPAGE_PMD_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
vmf->ptl = pmd_lock(vma->vm_mm, vmf->pmd);
if (unlikely(!pmd_same(*vmf->pmd, orig_pmd)))
* No need to double call mmu_notifier->invalidate_range() callback as
* the above pmdp_huge_clear_flush_notify() did already call it.
*/
- mmu_notifier_invalidate_range_only_end(vma->vm_mm, mmun_start,
- mmun_end);
+ mmu_notifier_invalidate_range_only_end(&range);
ret |= VM_FAULT_WRITE;
put_page(page);
out_free_pages:
spin_unlock(vmf->ptl);
- mmu_notifier_invalidate_range_end(vma->vm_mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
for (i = 0; i < HPAGE_PMD_NR; i++) {
memcg = (void *)page_private(pages[i]);
set_page_private(pages[i], 0);
struct page *page = NULL, *new_page;
struct mem_cgroup *memcg;
unsigned long haddr = vmf->address & HPAGE_PMD_MASK;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
gfp_t huge_gfp; /* for allocation and charge */
vm_fault_t ret = 0;
vma, HPAGE_PMD_NR);
__SetPageUptodate(new_page);
- mmun_start = haddr;
- mmun_end = haddr + HPAGE_PMD_SIZE;
- mmu_notifier_invalidate_range_start(vma->vm_mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, vma->vm_mm, haddr,
+ haddr + HPAGE_PMD_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
spin_lock(vmf->ptl);
if (page)
* No need to double call mmu_notifier->invalidate_range() callback as
* the above pmdp_huge_clear_flush_notify() did already call it.
*/
- mmu_notifier_invalidate_range_only_end(vma->vm_mm, mmun_start,
- mmun_end);
+ mmu_notifier_invalidate_range_only_end(&range);
out:
return ret;
out_unlock:
unsigned long address)
{
spinlock_t *ptl;
- struct mm_struct *mm = vma->vm_mm;
- unsigned long haddr = address & HPAGE_PUD_MASK;
+ struct mmu_notifier_range range;
- mmu_notifier_invalidate_range_start(mm, haddr, haddr + HPAGE_PUD_SIZE);
- ptl = pud_lock(mm, pud);
+ mmu_notifier_range_init(&range, vma->vm_mm, address & HPAGE_PUD_MASK,
+ (address & HPAGE_PUD_MASK) + HPAGE_PUD_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
+ ptl = pud_lock(vma->vm_mm, pud);
if (unlikely(!pud_trans_huge(*pud) && !pud_devmap(*pud)))
goto out;
- __split_huge_pud_locked(vma, pud, haddr);
+ __split_huge_pud_locked(vma, pud, range.start);
out:
spin_unlock(ptl);
* No need to double call mmu_notifier->invalidate_range() callback as
* the above pudp_huge_clear_flush_notify() did already call it.
*/
- mmu_notifier_invalidate_range_only_end(mm, haddr, haddr +
- HPAGE_PUD_SIZE);
+ mmu_notifier_invalidate_range_only_end(&range);
}
#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
unsigned long address, bool freeze, struct page *page)
{
spinlock_t *ptl;
- struct mm_struct *mm = vma->vm_mm;
- unsigned long haddr = address & HPAGE_PMD_MASK;
+ struct mmu_notifier_range range;
- mmu_notifier_invalidate_range_start(mm, haddr, haddr + HPAGE_PMD_SIZE);
- ptl = pmd_lock(mm, pmd);
+ mmu_notifier_range_init(&range, vma->vm_mm, address & HPAGE_PMD_MASK,
+ (address & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
+ ptl = pmd_lock(vma->vm_mm, pmd);
/*
* If caller asks to setup a migration entries, we need a page to check
clear_page_mlock(page);
} else if (!(pmd_devmap(*pmd) || is_pmd_migration_entry(*pmd)))
goto out;
- __split_huge_pmd_locked(vma, pmd, haddr, freeze);
+ __split_huge_pmd_locked(vma, pmd, range.start, freeze);
out:
spin_unlock(ptl);
/*
* any further changes to individual pte will notify. So no need
* to call mmu_notifier->invalidate_range()
*/
- mmu_notifier_invalidate_range_only_end(mm, haddr, haddr +
- HPAGE_PMD_SIZE);
+ mmu_notifier_invalidate_range_only_end(&range);
}
void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address,
int cow;
struct hstate *h = hstate_vma(vma);
unsigned long sz = huge_page_size(h);
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
int ret = 0;
cow = (vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
- mmun_start = vma->vm_start;
- mmun_end = vma->vm_end;
- if (cow)
- mmu_notifier_invalidate_range_start(src, mmun_start, mmun_end);
+ if (cow) {
+ mmu_notifier_range_init(&range, src, vma->vm_start,
+ vma->vm_end);
+ mmu_notifier_invalidate_range_start(&range);
+ }
for (addr = vma->vm_start; addr < vma->vm_end; addr += sz) {
spinlock_t *src_ptl, *dst_ptl;
}
if (cow)
- mmu_notifier_invalidate_range_end(src, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
return ret;
}
struct page *page;
struct hstate *h = hstate_vma(vma);
unsigned long sz = huge_page_size(h);
- unsigned long mmun_start = start; /* For mmu_notifiers */
- unsigned long mmun_end = end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
WARN_ON(!is_vm_hugetlb_page(vma));
BUG_ON(start & ~huge_page_mask(h));
/*
* If sharing possible, alert mmu notifiers of worst case.
*/
- adjust_range_if_pmd_sharing_possible(vma, &mmun_start, &mmun_end);
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, start, end);
+ adjust_range_if_pmd_sharing_possible(vma, &range.start, &range.end);
+ mmu_notifier_invalidate_range_start(&range);
address = start;
for (; address < end; address += sz) {
ptep = huge_pte_offset(mm, address, sz);
if (ref_page)
break;
}
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
tlb_end_vma(tlb, vma);
}
struct page *old_page, *new_page;
int outside_reserve = 0;
vm_fault_t ret = 0;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
unsigned long haddr = address & huge_page_mask(h);
+ struct mmu_notifier_range range;
pte = huge_ptep_get(ptep);
old_page = pte_page(pte);
__SetPageUptodate(new_page);
set_page_huge_active(new_page);
- mmun_start = haddr;
- mmun_end = mmun_start + huge_page_size(h);
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, haddr, haddr + huge_page_size(h));
+ mmu_notifier_invalidate_range_start(&range);
/*
* Retake the page table lock to check for racing updates
/* Break COW */
huge_ptep_clear_flush(vma, haddr, ptep);
- mmu_notifier_invalidate_range(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range(mm, range.start, range.end);
set_huge_pte_at(mm, haddr, ptep,
make_huge_pte(vma, new_page, 1));
page_remove_rmap(old_page, true);
new_page = old_page;
}
spin_unlock(ptl);
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
out_release_all:
restore_reserve_on_error(h, vma, haddr, new_page);
put_page(new_page);
pte_t pte;
struct hstate *h = hstate_vma(vma);
unsigned long pages = 0;
- unsigned long f_start = start;
- unsigned long f_end = end;
bool shared_pmd = false;
+ struct mmu_notifier_range range;
/*
* In the case of shared PMDs, the area to flush could be beyond
- * start/end. Set f_start/f_end to cover the maximum possible
+ * start/end. Set range.start/range.end to cover the maximum possible
* range if PMD sharing is possible.
*/
- adjust_range_if_pmd_sharing_possible(vma, &f_start, &f_end);
+ mmu_notifier_range_init(&range, mm, start, end);
+ adjust_range_if_pmd_sharing_possible(vma, &range.start, &range.end);
BUG_ON(address >= end);
- flush_cache_range(vma, f_start, f_end);
+ flush_cache_range(vma, range.start, range.end);
- mmu_notifier_invalidate_range_start(mm, f_start, f_end);
+ mmu_notifier_invalidate_range_start(&range);
i_mmap_lock_write(vma->vm_file->f_mapping);
for (; address < end; address += huge_page_size(h)) {
spinlock_t *ptl;
* did unshare a page of pmds, flush the range corresponding to the pud.
*/
if (shared_pmd)
- flush_hugetlb_tlb_range(vma, f_start, f_end);
+ flush_hugetlb_tlb_range(vma, range.start, range.end);
else
flush_hugetlb_tlb_range(vma, start, end);
/*
* See Documentation/vm/mmu_notifier.rst
*/
i_mmap_unlock_write(vma->vm_file->f_mapping);
- mmu_notifier_invalidate_range_end(mm, f_start, f_end);
+ mmu_notifier_invalidate_range_end(&range);
return pages << h->order;
}
int isolated = 0, result = 0;
struct mem_cgroup *memcg;
struct vm_area_struct *vma;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
gfp_t gfp;
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
pte = pte_offset_map(pmd, address);
pte_ptl = pte_lockptr(mm, pmd);
- mmun_start = address;
- mmun_end = address + HPAGE_PMD_SIZE;
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, address, address + HPAGE_PMD_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
pmd_ptl = pmd_lock(mm, pmd); /* probably unnecessary */
/*
* After this gup_fast can't run anymore. This also removes
*/
_pmd = pmdp_collapse_flush(vma, address, pmd);
spin_unlock(pmd_ptl);
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
spin_lock(pte_ptl);
isolated = __collapse_huge_page_isolate(vma, address, pte);
};
int swapped;
int err = -EFAULT;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
pvmw.address = page_address_in_vma(page, vma);
if (pvmw.address == -EFAULT)
BUG_ON(PageTransCompound(page));
- mmun_start = pvmw.address;
- mmun_end = pvmw.address + PAGE_SIZE;
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, pvmw.address,
+ pvmw.address + PAGE_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
if (!page_vma_mapped_walk(&pvmw))
goto out_mn;
out_unlock:
page_vma_mapped_walk_done(&pvmw);
out_mn:
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
out:
return err;
}
spinlock_t *ptl;
unsigned long addr;
int err = -EFAULT;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
addr = page_address_in_vma(page, vma);
if (addr == -EFAULT)
if (!pmd)
goto out;
- mmun_start = addr;
- mmun_end = addr + PAGE_SIZE;
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, addr, addr + PAGE_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
ptep = pte_offset_map_lock(mm, pmd, addr, &ptl);
if (!pte_same(*ptep, orig_pte)) {
pte_unmap_unlock(ptep, ptl);
err = 0;
out_mn:
- mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
out:
return err;
}
static int madvise_free_single_vma(struct vm_area_struct *vma,
unsigned long start_addr, unsigned long end_addr)
{
- unsigned long start, end;
struct mm_struct *mm = vma->vm_mm;
+ struct mmu_notifier_range range;
struct mmu_gather tlb;
/* MADV_FREE works for only anon vma at the moment */
if (!vma_is_anonymous(vma))
return -EINVAL;
- start = max(vma->vm_start, start_addr);
- if (start >= vma->vm_end)
+ range.start = max(vma->vm_start, start_addr);
+ if (range.start >= vma->vm_end)
return -EINVAL;
- end = min(vma->vm_end, end_addr);
- if (end <= vma->vm_start)
+ range.end = min(vma->vm_end, end_addr);
+ if (range.end <= vma->vm_start)
return -EINVAL;
+ mmu_notifier_range_init(&range, mm, range.start, range.end);
lru_add_drain();
- tlb_gather_mmu(&tlb, mm, start, end);
+ tlb_gather_mmu(&tlb, mm, range.start, range.end);
update_hiwater_rss(mm);
- mmu_notifier_invalidate_range_start(mm, start, end);
- madvise_free_page_range(&tlb, vma, start, end);
- mmu_notifier_invalidate_range_end(mm, start, end);
- tlb_finish_mmu(&tlb, start, end);
+ mmu_notifier_invalidate_range_start(&range);
+ madvise_free_page_range(&tlb, vma, range.start, range.end);
+ mmu_notifier_invalidate_range_end(&range);
+ tlb_finish_mmu(&tlb, range.start, range.end);
return 0;
}
unsigned long next;
unsigned long addr = vma->vm_start;
unsigned long end = vma->vm_end;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
+ struct mmu_notifier_range range;
bool is_cow;
int ret;
* is_cow_mapping() returns true.
*/
is_cow = is_cow_mapping(vma->vm_flags);
- mmun_start = addr;
- mmun_end = end;
- if (is_cow)
- mmu_notifier_invalidate_range_start(src_mm, mmun_start,
- mmun_end);
+
+ if (is_cow) {
+ mmu_notifier_range_init(&range, src_mm, addr, end);
+ mmu_notifier_invalidate_range_start(&range);
+ }
ret = 0;
dst_pgd = pgd_offset(dst_mm, addr);
} while (dst_pgd++, src_pgd++, addr = next, addr != end);
if (is_cow)
- mmu_notifier_invalidate_range_end(src_mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
return ret;
}
struct vm_area_struct *vma, unsigned long start_addr,
unsigned long end_addr)
{
- struct mm_struct *mm = vma->vm_mm;
+ struct mmu_notifier_range range;
- mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
+ mmu_notifier_range_init(&range, vma->vm_mm, start_addr, end_addr);
+ mmu_notifier_invalidate_range_start(&range);
for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next)
unmap_single_vma(tlb, vma, start_addr, end_addr, NULL);
- mmu_notifier_invalidate_range_end(mm, start_addr, end_addr);
+ mmu_notifier_invalidate_range_end(&range);
}
/**
void zap_page_range(struct vm_area_struct *vma, unsigned long start,
unsigned long size)
{
- struct mm_struct *mm = vma->vm_mm;
+ struct mmu_notifier_range range;
struct mmu_gather tlb;
- unsigned long end = start + size;
lru_add_drain();
- tlb_gather_mmu(&tlb, mm, start, end);
- update_hiwater_rss(mm);
- mmu_notifier_invalidate_range_start(mm, start, end);
- for ( ; vma && vma->vm_start < end; vma = vma->vm_next)
- unmap_single_vma(&tlb, vma, start, end, NULL);
- mmu_notifier_invalidate_range_end(mm, start, end);
- tlb_finish_mmu(&tlb, start, end);
+ mmu_notifier_range_init(&range, vma->vm_mm, start, start + size);
+ tlb_gather_mmu(&tlb, vma->vm_mm, start, range.end);
+ update_hiwater_rss(vma->vm_mm);
+ mmu_notifier_invalidate_range_start(&range);
+ for ( ; vma && vma->vm_start < range.end; vma = vma->vm_next)
+ unmap_single_vma(&tlb, vma, start, range.end, NULL);
+ mmu_notifier_invalidate_range_end(&range);
+ tlb_finish_mmu(&tlb, start, range.end);
}
/**
static void zap_page_range_single(struct vm_area_struct *vma, unsigned long address,
unsigned long size, struct zap_details *details)
{
- struct mm_struct *mm = vma->vm_mm;
+ struct mmu_notifier_range range;
struct mmu_gather tlb;
- unsigned long end = address + size;
lru_add_drain();
- tlb_gather_mmu(&tlb, mm, address, end);
- update_hiwater_rss(mm);
- mmu_notifier_invalidate_range_start(mm, address, end);
- unmap_single_vma(&tlb, vma, address, end, details);
- mmu_notifier_invalidate_range_end(mm, address, end);
- tlb_finish_mmu(&tlb, address, end);
+ mmu_notifier_range_init(&range, vma->vm_mm, address, address + size);
+ tlb_gather_mmu(&tlb, vma->vm_mm, address, range.end);
+ update_hiwater_rss(vma->vm_mm);
+ mmu_notifier_invalidate_range_start(&range);
+ unmap_single_vma(&tlb, vma, address, range.end, details);
+ mmu_notifier_invalidate_range_end(&range);
+ tlb_finish_mmu(&tlb, address, range.end);
}
/**
struct page *new_page = NULL;
pte_t entry;
int page_copied = 0;
- const unsigned long mmun_start = vmf->address & PAGE_MASK;
- const unsigned long mmun_end = mmun_start + PAGE_SIZE;
struct mem_cgroup *memcg;
+ struct mmu_notifier_range range;
if (unlikely(anon_vma_prepare(vma)))
goto oom;
__SetPageUptodate(new_page);
- mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, mm, vmf->address & PAGE_MASK,
+ (vmf->address & PAGE_MASK) + PAGE_SIZE);
+ mmu_notifier_invalidate_range_start(&range);
/*
* Re-check the pte - we dropped the lock
* No need to double call mmu_notifier->invalidate_range() callback as
* the above ptep_clear_flush_notify() did already call it.
*/
- mmu_notifier_invalidate_range_only_end(mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_only_end(&range);
if (old_page) {
/*
* Don't let another task, with possibly unlocked vma,
#endif /* __PAGETABLE_PMD_FOLDED */
static int __follow_pte_pmd(struct mm_struct *mm, unsigned long address,
- unsigned long *start, unsigned long *end,
+ struct mmu_notifier_range *range,
pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp)
{
pgd_t *pgd;
if (!pmdpp)
goto out;
- if (start && end) {
- *start = address & PMD_MASK;
- *end = *start + PMD_SIZE;
- mmu_notifier_invalidate_range_start(mm, *start, *end);
+ if (range) {
+ mmu_notifier_range_init(range, mm, address & PMD_MASK,
+ (address & PMD_MASK) + PMD_SIZE);
+ mmu_notifier_invalidate_range_start(range);
}
*ptlp = pmd_lock(mm, pmd);
if (pmd_huge(*pmd)) {
return 0;
}
spin_unlock(*ptlp);
- if (start && end)
- mmu_notifier_invalidate_range_end(mm, *start, *end);
+ if (range)
+ mmu_notifier_invalidate_range_end(range);
}
if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd)))
goto out;
- if (start && end) {
- *start = address & PAGE_MASK;
- *end = *start + PAGE_SIZE;
- mmu_notifier_invalidate_range_start(mm, *start, *end);
+ if (range) {
+ range->start = address & PAGE_MASK;
+ range->end = range->start + PAGE_SIZE;
+ mmu_notifier_invalidate_range_start(range);
}
ptep = pte_offset_map_lock(mm, pmd, address, ptlp);
if (!pte_present(*ptep))
return 0;
unlock:
pte_unmap_unlock(ptep, *ptlp);
- if (start && end)
- mmu_notifier_invalidate_range_end(mm, *start, *end);
+ if (range)
+ mmu_notifier_invalidate_range_end(range);
out:
return -EINVAL;
}
/* (void) is needed to make gcc happy */
(void) __cond_lock(*ptlp,
- !(res = __follow_pte_pmd(mm, address, NULL, NULL,
+ !(res = __follow_pte_pmd(mm, address, NULL,
ptepp, NULL, ptlp)));
return res;
}
int follow_pte_pmd(struct mm_struct *mm, unsigned long address,
- unsigned long *start, unsigned long *end,
- pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp)
+ struct mmu_notifier_range *range,
+ pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp)
{
int res;
/* (void) is needed to make gcc happy */
(void) __cond_lock(*ptlp,
- !(res = __follow_pte_pmd(mm, address, start, end,
+ !(res = __follow_pte_pmd(mm, address, range,
ptepp, pmdpp, ptlp)));
return res;
}
*/
static void migrate_vma_collect(struct migrate_vma *migrate)
{
+ struct mmu_notifier_range range;
struct mm_walk mm_walk;
mm_walk.pmd_entry = migrate_vma_collect_pmd;
mm_walk.mm = migrate->vma->vm_mm;
mm_walk.private = migrate;
- mmu_notifier_invalidate_range_start(mm_walk.mm,
- migrate->start,
- migrate->end);
+ mmu_notifier_range_init(&range, mm_walk.mm, migrate->start,
+ migrate->end);
+ mmu_notifier_invalidate_range_start(&range);
walk_page_range(migrate->start, migrate->end, &mm_walk);
- mmu_notifier_invalidate_range_end(mm_walk.mm,
- migrate->start,
- migrate->end);
+ mmu_notifier_invalidate_range_end(&range);
migrate->end = migrate->start + (migrate->npages << PAGE_SHIFT);
}
{
const unsigned long npages = migrate->npages;
const unsigned long start = migrate->start;
- struct vm_area_struct *vma = migrate->vma;
- struct mm_struct *mm = vma->vm_mm;
- unsigned long addr, i, mmu_start;
+ struct mmu_notifier_range range;
+ unsigned long addr, i;
bool notified = false;
for (i = 0, addr = start; i < npages; addr += PAGE_SIZE, i++) {
continue;
}
if (!notified) {
- mmu_start = addr;
notified = true;
- mmu_notifier_invalidate_range_start(mm,
- mmu_start,
- migrate->end);
+
+ mmu_notifier_range_init(&range,
+ migrate->vma->vm_mm,
+ addr, migrate->end);
+ mmu_notifier_invalidate_range_start(&range);
}
migrate_vma_insert_page(migrate, addr, newpage,
&migrate->src[i],
* did already call it.
*/
if (notified)
- mmu_notifier_invalidate_range_only_end(mm, mmu_start,
- migrate->end);
+ mmu_notifier_invalidate_range_only_end(&range);
}
/*
srcu_read_unlock(&srcu, id);
}
-int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
- unsigned long start, unsigned long end,
- bool blockable)
+int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
- struct mmu_notifier_range _range, *range = &_range;
struct mmu_notifier *mn;
int ret = 0;
int id;
- range->blockable = blockable;
- range->start = start;
- range->end = end;
- range->mm = mm;
-
id = srcu_read_lock(&srcu);
- hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
+ hlist_for_each_entry_rcu(mn, &range->mm->mmu_notifier_mm->list, hlist) {
if (mn->ops->invalidate_range_start) {
int _ret = mn->ops->invalidate_range_start(mn, range);
if (_ret) {
pr_info("%pS callback failed with %d in %sblockable context.\n",
- mn->ops->invalidate_range_start, _ret,
- !blockable ? "non-" : "");
+ mn->ops->invalidate_range_start, _ret,
+ !range->blockable ? "non-" : "");
ret = _ret;
}
}
}
EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_start);
-void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
- unsigned long start,
- unsigned long end,
+void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range,
bool only_end)
{
- struct mmu_notifier_range _range, *range = &_range;
struct mmu_notifier *mn;
int id;
- /*
- * The end call back will never be call if the start refused to go
- * through because of blockable was false so here assume that we
- * can block.
- */
- range->blockable = true;
- range->start = start;
- range->end = end;
- range->mm = mm;
-
id = srcu_read_lock(&srcu);
- hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
+ hlist_for_each_entry_rcu(mn, &range->mm->mmu_notifier_mm->list, hlist) {
/*
* Call invalidate_range here too to avoid the need for the
* subsystem of having to register an invalidate_range_end
* already happen under page table lock.
*/
if (!only_end && mn->ops->invalidate_range)
- mn->ops->invalidate_range(mn, mm, start, end);
+ mn->ops->invalidate_range(mn, range->mm,
+ range->start,
+ range->end);
if (mn->ops->invalidate_range_end)
mn->ops->invalidate_range_end(mn, range);
}
pgprot_t newprot, int dirty_accountable, int prot_numa)
{
pmd_t *pmd;
- struct mm_struct *mm = vma->vm_mm;
unsigned long next;
unsigned long pages = 0;
unsigned long nr_huge_updates = 0;
- unsigned long mni_start = 0;
+ struct mmu_notifier_range range;
+
+ range.start = 0;
pmd = pmd_offset(pud, addr);
do {
goto next;
/* invoke the mmu notifier if the pmd is populated */
- if (!mni_start) {
- mni_start = addr;
- mmu_notifier_invalidate_range_start(mm, mni_start, end);
+ if (!range.start) {
+ mmu_notifier_range_init(&range, vma->vm_mm, addr, end);
+ mmu_notifier_invalidate_range_start(&range);
}
if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) {
cond_resched();
} while (pmd++, addr = next, addr != end);
- if (mni_start)
- mmu_notifier_invalidate_range_end(mm, mni_start, end);
+ if (range.start)
+ mmu_notifier_invalidate_range_end(&range);
if (nr_huge_updates)
count_vm_numa_events(NUMA_HUGE_PTE_UPDATES, nr_huge_updates);
bool need_rmap_locks)
{
unsigned long extent, next, old_end;
+ struct mmu_notifier_range range;
pmd_t *old_pmd, *new_pmd;
- unsigned long mmun_start; /* For mmu_notifiers */
- unsigned long mmun_end; /* For mmu_notifiers */
old_end = old_addr + len;
flush_cache_range(vma, old_addr, old_end);
- mmun_start = old_addr;
- mmun_end = old_end;
- mmu_notifier_invalidate_range_start(vma->vm_mm, mmun_start, mmun_end);
+ mmu_notifier_range_init(&range, vma->vm_mm, old_addr, old_end);
+ mmu_notifier_invalidate_range_start(&range);
for (; old_addr < old_end; old_addr += extent, new_addr += extent) {
cond_resched();
new_pmd, new_addr, need_rmap_locks);
}
- mmu_notifier_invalidate_range_end(vma->vm_mm, mmun_start, mmun_end);
+ mmu_notifier_invalidate_range_end(&range);
return len + old_addr - old_end; /* how much done */
}
* count elevated without a good reason.
*/
if (vma_is_anonymous(vma) || !(vma->vm_flags & VM_SHARED)) {
- const unsigned long start = vma->vm_start;
- const unsigned long end = vma->vm_end;
+ struct mmu_notifier_range range;
struct mmu_gather tlb;
- tlb_gather_mmu(&tlb, mm, start, end);
- if (mmu_notifier_invalidate_range_start_nonblock(mm, start, end)) {
- tlb_finish_mmu(&tlb, start, end);
+ mmu_notifier_range_init(&range, mm, vma->vm_start,
+ vma->vm_end);
+ tlb_gather_mmu(&tlb, mm, range.start, range.end);
+ if (mmu_notifier_invalidate_range_start_nonblock(&range)) {
+ tlb_finish_mmu(&tlb, range.start, range.end);
ret = false;
continue;
}
- unmap_page_range(&tlb, vma, start, end, NULL);
- mmu_notifier_invalidate_range_end(mm, start, end);
- tlb_finish_mmu(&tlb, start, end);
+ unmap_page_range(&tlb, vma, range.start, range.end, NULL);
+ mmu_notifier_invalidate_range_end(&range);
+ tlb_finish_mmu(&tlb, range.start, range.end);
}
}
.address = address,
.flags = PVMW_SYNC,
};
- unsigned long start = address, end;
+ struct mmu_notifier_range range;
int *cleaned = arg;
/*
* We have to assume the worse case ie pmd for invalidation. Note that
* the page can not be free from this function.
*/
- end = min(vma->vm_end, start + (PAGE_SIZE << compound_order(page)));
- mmu_notifier_invalidate_range_start(vma->vm_mm, start, end);
+ mmu_notifier_range_init(&range, vma->vm_mm, address,
+ min(vma->vm_end, address +
+ (PAGE_SIZE << compound_order(page))));
+ mmu_notifier_invalidate_range_start(&range);
while (page_vma_mapped_walk(&pvmw)) {
unsigned long cstart;
(*cleaned)++;
}
- mmu_notifier_invalidate_range_end(vma->vm_mm, start, end);
+ mmu_notifier_invalidate_range_end(&range);
return true;
}
pte_t pteval;
struct page *subpage;
bool ret = true;
- unsigned long start = address, end;
+ struct mmu_notifier_range range;
enum ttu_flags flags = (enum ttu_flags)arg;
/* munlock has nothing to gain from examining un-locked vmas */
* Note that the page can not be free in this function as call of
* try_to_unmap() must hold a reference on the page.
*/
- end = min(vma->vm_end, start + (PAGE_SIZE << compound_order(page)));
+ mmu_notifier_range_init(&range, vma->vm_mm, vma->vm_start,
+ min(vma->vm_end, vma->vm_start +
+ (PAGE_SIZE << compound_order(page))));
if (PageHuge(page)) {
/*
* If sharing is possible, start and end will be adjusted
* accordingly.
*/
- adjust_range_if_pmd_sharing_possible(vma, &start, &end);
+ adjust_range_if_pmd_sharing_possible(vma, &range.start,
+ &range.end);
}
- mmu_notifier_invalidate_range_start(vma->vm_mm, start, end);
+ mmu_notifier_invalidate_range_start(&range);
while (page_vma_mapped_walk(&pvmw)) {
#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
* we must flush them all. start/end were
* already adjusted above to cover this range.
*/
- flush_cache_range(vma, start, end);
- flush_tlb_range(vma, start, end);
- mmu_notifier_invalidate_range(mm, start, end);
+ flush_cache_range(vma, range.start, range.end);
+ flush_tlb_range(vma, range.start, range.end);
+ mmu_notifier_invalidate_range(mm, range.start,
+ range.end);
/*
* The ref count of the PMD page was dropped
put_page(page);
}
- mmu_notifier_invalidate_range_end(vma->vm_mm, start, end);
+ mmu_notifier_invalidate_range_end(&range);
return ret;
}
projects / linux-block.git / commitdiff