*/
void clear_user_page(void *to, unsigned long address, struct page *page)
{
+ __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
clear_page(to);
else {
void copy_user_page(void *to, void *from, unsigned long address,
struct page *page)
{
+ __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
copy_page(to, from);
else {
mutex_unlock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
}
}
+
+/*
+ * For SH-4, we have our own implementation for ptep_get_and_clear
+ */
+inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ pte_t pte = *ptep;
+
+ pte_clear(mm, addr, ptep);
+ if (!pte_not_present(pte)) {
+ unsigned long pfn = pte_pfn(pte);
+ if (pfn_valid(pfn)) {
+ struct page *page = pfn_to_page(pfn);
+ struct address_space *mapping = page_mapping(page);
+ if (!mapping || !mapping_writably_mapped(mapping))
+ __clear_bit(PG_mapped, &page->flags);
+ }
+ }
+ return pte;
+}