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x86: use the same pgd_list for PAE and 64-bit
Use a standard list threaded through page->lru for maintaining the pgd list on PAE. This is the same as 64-bit, and seems saner than using a non-standard list via page->index. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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parent
fa28ba21ce
commit
e3ed910db2
6 changed files with 11 additions and 27 deletions
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@ -907,10 +907,8 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
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force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
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}
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#ifdef CONFIG_X86_64
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DEFINE_SPINLOCK(pgd_lock);
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LIST_HEAD(pgd_list);
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#endif
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void vmalloc_sync_all(void)
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{
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@ -935,13 +933,11 @@ void vmalloc_sync_all(void)
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struct page *page;
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spin_lock_irqsave(&pgd_lock, flags);
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for (page = pgd_list; page; page =
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(struct page *)page->index)
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list_for_each_entry(page, &pgd_list, lru) {
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if (!vmalloc_sync_one(page_address(page),
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address)) {
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BUG_ON(page != pgd_list);
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address))
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break;
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}
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}
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spin_unlock_irqrestore(&pgd_lock, flags);
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if (!page)
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set_bit(pgd_index(address), insync);
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@ -175,7 +175,7 @@ static void __set_pmd_pte(pte_t *kpte, unsigned long address, pte_t pte)
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if (!SHARED_KERNEL_PMD) {
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struct page *page;
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for (page = pgd_list; page; page = (struct page *)page->index) {
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list_for_each_entry(page, &pgd_list, lru) {
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pgd_t *pgd;
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pud_t *pud;
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pmd_t *pmd;
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@ -205,27 +205,18 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
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* vmalloc faults work because attached pagetables are never freed.
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* -- wli
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*/
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DEFINE_SPINLOCK(pgd_lock);
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struct page *pgd_list;
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static inline void pgd_list_add(pgd_t *pgd)
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{
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struct page *page = virt_to_page(pgd);
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page->index = (unsigned long)pgd_list;
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if (pgd_list)
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set_page_private(pgd_list, (unsigned long)&page->index);
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pgd_list = page;
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set_page_private(page, (unsigned long)&pgd_list);
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list_add(&page->lru, &pgd_list);
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}
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static inline void pgd_list_del(pgd_t *pgd)
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{
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struct page *next, **pprev, *page = virt_to_page(pgd);
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next = (struct page *)page->index;
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pprev = (struct page **)page_private(page);
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*pprev = next;
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if (next)
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set_page_private(next, (unsigned long)pprev);
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struct page *page = virt_to_page(pgd);
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list_del(&page->lru);
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}
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@ -131,6 +131,8 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
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extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
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#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
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extern spinlock_t pgd_lock;
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extern struct list_head pgd_list;
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/*
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* The following only work if pte_present() is true.
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@ -27,8 +27,6 @@ struct vm_area_struct;
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extern pgd_t swapper_pg_dir[1024];
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extern struct kmem_cache *pmd_cache;
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extern spinlock_t pgd_lock;
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extern struct page *pgd_list;
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void check_pgt_cache(void);
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static inline void pgtable_cache_init(void) {}
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@ -240,9 +240,6 @@ static inline unsigned long pmd_bad(pmd_t pmd)
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
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#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
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extern spinlock_t pgd_lock;
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extern struct list_head pgd_list;
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extern int kern_addr_valid(unsigned long addr);
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#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
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