#include <linux/userfaultfd_k.h>
#include <asm/io.h>
+#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/tlb.h>
}
}
-int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
- pmd_t *pmd, unsigned long address)
+int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
{
spinlock_t *ptl;
pgtable_t new = pte_alloc_one(mm, address);
return;
}
if (nr_unshown) {
- printk(KERN_ALERT
- "BUG: Bad page map: %lu messages suppressed\n",
- nr_unshown);
+ pr_alert("BUG: Bad page map: %lu messages suppressed\n",
+ nr_unshown);
nr_unshown = 0;
}
nr_shown = 0;
mapping = vma->vm_file ? vma->vm_file->f_mapping : NULL;
index = linear_page_index(vma, addr);
- printk(KERN_ALERT
- "BUG: Bad page map in process %s pte:%08llx pmd:%08llx\n",
- current->comm,
- (long long)pte_val(pte), (long long)pmd_val(*pmd));
+ pr_alert("BUG: Bad page map in process %s pte:%08llx pmd:%08llx\n",
+ current->comm,
+ (long long)pte_val(pte), (long long)pmd_val(*pmd));
if (page)
dump_page(page, "bad pte");
- printk(KERN_ALERT
- "addr:%p vm_flags:%08lx anon_vma:%p mapping:%p index:%lx\n",
- (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index);
+ pr_alert("addr:%p vm_flags:%08lx anon_vma:%p mapping:%p index:%lx\n",
+ (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index);
/*
* Choose text because data symbols depend on CONFIG_KALLSYMS_ALL=y
*/
if (!PageAnon(page)) {
if (pte_dirty(ptent)) {
+ /*
+ * oom_reaper cannot tear down dirty
+ * pages
+ */
+ if (unlikely(details && details->ignore_dirty))
+ continue;
force_flush = 1;
set_page_dirty(page);
}
}
continue;
}
- /* If details->check_mapping, we leave swap entries. */
- if (unlikely(details))
+ /* only check swap_entries if explicitly asked for in details */
+ if (unlikely(details && !details->check_swap_entries))
continue;
entry = pte_to_swp_entry(ptent);
return addr;
}
-static void unmap_page_range(struct mmu_gather *tlb,
+void unmap_page_range(struct mmu_gather *tlb,
struct vm_area_struct *vma,
unsigned long addr, unsigned long end,
struct zap_details *details)
pgd_t *pgd;
unsigned long next;
- if (details && !details->check_mapping)
- details = NULL;
-
BUG_ON(addr >= end);
tlb_start_vma(tlb, vma);
pgd = pgd_offset(vma->vm_mm, addr);
VM_BUG_ON_PAGE(PageAnon(page), page);
mapping = page->mapping;
unlock_page(page);
- page_cache_release(page);
+ put_page(page);
if ((dirtied || page_mkwrite) && mapping) {
/*
}
if (new_page)
- page_cache_release(new_page);
+ put_page(new_page);
pte_unmap_unlock(page_table, ptl);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
munlock_vma_page(old_page);
unlock_page(old_page);
}
- page_cache_release(old_page);
+ put_page(old_page);
}
return page_copied ? VM_FAULT_WRITE : 0;
oom_free_new:
- page_cache_release(new_page);
+ put_page(new_page);
oom:
if (old_page)
- page_cache_release(old_page);
+ put_page(old_page);
return VM_FAULT_OOM;
}
{
int page_mkwrite = 0;
- page_cache_get(old_page);
+ get_page(old_page);
if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
int tmp;
tmp = do_page_mkwrite(vma, old_page, address);
if (unlikely(!tmp || (tmp &
(VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
- page_cache_release(old_page);
+ put_page(old_page);
return tmp;
}
/*
if (!pte_same(*page_table, orig_pte)) {
unlock_page(old_page);
pte_unmap_unlock(page_table, ptl);
- page_cache_release(old_page);
+ put_page(old_page);
return 0;
}
page_mkwrite = 1;
*/
if (PageAnon(old_page) && !PageKsm(old_page)) {
if (!trylock_page(old_page)) {
- page_cache_get(old_page);
+ get_page(old_page);
pte_unmap_unlock(page_table, ptl);
lock_page(old_page);
page_table = pte_offset_map_lock(mm, pmd, address,
if (!pte_same(*page_table, orig_pte)) {
unlock_page(old_page);
pte_unmap_unlock(page_table, ptl);
- page_cache_release(old_page);
+ put_page(old_page);
return 0;
}
- page_cache_release(old_page);
+ put_page(old_page);
}
if (reuse_swap_page(old_page)) {
/*
/*
* Ok, we need to copy. Oh, well..
*/
- page_cache_get(old_page);
+ get_page(old_page);
pte_unmap_unlock(page_table, ptl);
return wp_page_copy(mm, vma, address, page_table, pmd,
vba = vma->vm_pgoff;
vea = vba + vma_pages(vma) - 1;
- /* Assume for now that PAGE_CACHE_SHIFT == PAGE_SHIFT */
zba = details->first_index;
if (zba < vba)
zba = vba;
void unmap_mapping_range(struct address_space *mapping,
loff_t const holebegin, loff_t const holelen, int even_cows)
{
- struct zap_details details;
+ struct zap_details details = { };
pgoff_t hba = holebegin >> PAGE_SHIFT;
pgoff_t hlen = (holelen + PAGE_SIZE - 1) >> PAGE_SHIFT;
* parallel locked swapcache.
*/
unlock_page(swapcache);
- page_cache_release(swapcache);
+ put_page(swapcache);
}
if (flags & FAULT_FLAG_WRITE) {
out_page:
unlock_page(page);
out_release:
- page_cache_release(page);
+ put_page(page);
if (page != swapcache) {
unlock_page(swapcache);
- page_cache_release(swapcache);
+ put_page(swapcache);
}
return ret;
}
if (userfaultfd_missing(vma)) {
pte_unmap_unlock(page_table, ptl);
mem_cgroup_cancel_charge(page, memcg, false);
- page_cache_release(page);
+ put_page(page);
return handle_userfault(vma, address, flags,
VM_UFFD_MISSING);
}
return 0;
release:
mem_cgroup_cancel_charge(page, memcg, false);
- page_cache_release(page);
+ put_page(page);
goto unlock;
oom_free_page:
- page_cache_release(page);
+ put_page(page);
oom:
return VM_FAULT_OOM;
}
if (unlikely(PageHWPoison(vmf.page))) {
if (ret & VM_FAULT_LOCKED)
unlock_page(vmf.page);
- page_cache_release(vmf.page);
+ put_page(vmf.page);
return VM_FAULT_HWPOISON;
}
if (unlikely(!pte_same(*pte, orig_pte))) {
pte_unmap_unlock(pte, ptl);
unlock_page(fault_page);
- page_cache_release(fault_page);
+ put_page(fault_page);
return ret;
}
do_set_pte(vma, address, fault_page, pte, false, false);
return VM_FAULT_OOM;
if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg, false)) {
- page_cache_release(new_page);
+ put_page(new_page);
return VM_FAULT_OOM;
}
pte_unmap_unlock(pte, ptl);
if (fault_page) {
unlock_page(fault_page);
- page_cache_release(fault_page);
+ put_page(fault_page);
} else {
/*
* The fault handler has no page to lock, so it holds
pte_unmap_unlock(pte, ptl);
if (fault_page) {
unlock_page(fault_page);
- page_cache_release(fault_page);
+ put_page(fault_page);
} else {
/*
* The fault handler has no page to lock, so it holds
return ret;
uncharge_out:
mem_cgroup_cancel_charge(new_page, memcg, false);
- page_cache_release(new_page);
+ put_page(new_page);
return ret;
}
tmp = do_page_mkwrite(vma, fault_page, address);
if (unlikely(!tmp ||
(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
- page_cache_release(fault_page);
+ put_page(fault_page);
return tmp;
}
}
if (unlikely(!pte_same(*pte, orig_pte))) {
pte_unmap_unlock(pte, ptl);
unlock_page(fault_page);
- page_cache_release(fault_page);
+ put_page(fault_page);
return ret;
}
do_set_pte(vma, address, fault_page, pte, true, false);
pmd_t *pmd;
pte_t *pte;
+ if (!arch_vma_access_permitted(vma, flags & FAULT_FLAG_WRITE,
+ flags & FAULT_FLAG_INSTRUCTION,
+ flags & FAULT_FLAG_REMOTE))
+ return VM_FAULT_SIGSEGV;
+
if (unlikely(is_vm_hugetlb_page(vma)))
return hugetlb_fault(mm, vma, address, flags);
}
/*
- * Use __pte_alloc instead of pte_alloc_map, because we can't
+ * Use pte_alloc() instead of pte_alloc_map, because we can't
* run pte_offset_map on the pmd, if an huge pmd could
* materialize from under us from a different thread.
*/
- if (unlikely(pmd_none(*pmd)) &&
- unlikely(__pte_alloc(mm, vma, pmd, address)))
+ if (unlikely(pte_alloc(mm, pmd, address)))
return VM_FAULT_OOM;
/*
* If a huge pmd materialized under us just retry later. Use
void *maddr;
struct page *page = NULL;
- ret = get_user_pages(tsk, mm, addr, 1,
+ ret = get_user_pages_remote(tsk, mm, addr, 1,
write, 1, &page, &vma);
if (ret <= 0) {
#ifndef CONFIG_HAVE_IOREMAP_PROT
buf, maddr + offset, bytes);
}
kunmap(page);
- page_cache_release(page);
+ put_page(page);
}
len -= bytes;
buf += bytes;
projects / cascardo / linux.git / blobdiff