1 files changed, 0 insertions, 222 deletions
diff --git a/arch/i386/mm/pageattr.c b/arch/i386/mm/pageattr.c
deleted file mode 100644
index f600fc244f0..00000000000
--- a/arch/i386/mm/pageattr.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/* 
- * Copyright 2002 Andi Kleen, SuSE Labs. 
- * Thanks to Ben LaHaise for precious feedback.
- */ 
-
-#include <linux/config.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/highmem.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <asm/uaccess.h>
-#include <asm/processor.h>
-#include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
-
-static DEFINE_SPINLOCK(cpa_lock);
-static struct list_head df_list = LIST_HEAD_INIT(df_list);
-
-
-pte_t *lookup_address(unsigned long address) 
-{ 
-	pgd_t *pgd = pgd_offset_k(address);
-	pud_t *pud;
-	pmd_t *pmd;
-	if (pgd_none(*pgd))
-		return NULL;
-	pud = pud_offset(pgd, address);
-	if (pud_none(*pud))
-		return NULL;
-	pmd = pmd_offset(pud, address);
-	if (pmd_none(*pmd))
-		return NULL;
-	if (pmd_large(*pmd))
-		return (pte_t *)pmd;
-        return pte_offset_kernel(pmd, address);
-} 
-
-static struct page *split_large_page(unsigned long address, pgprot_t prot)
-{ 
-	int i; 
-	unsigned long addr;
-	struct page *base;
-	pte_t *pbase;
-
-	spin_unlock_irq(&cpa_lock);
-	base = alloc_pages(GFP_KERNEL, 0);
-	spin_lock_irq(&cpa_lock);
-	if (!base) 
-		return NULL;
-
-	address = __pa(address);
-	addr = address & LARGE_PAGE_MASK; 
-	pbase = (pte_t *)page_address(base);
-	for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
-               set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT,
-                                          addr == address ? prot : PAGE_KERNEL));
-	}
-	return base;
-} 
-
-static void flush_kernel_map(void *dummy) 
-{ 
-	/* Could use CLFLUSH here if the CPU supports it (Hammer,P4) */
-	if (boot_cpu_data.x86_model >= 4) 
-		wbinvd();
-	/* Flush all to work around Errata in early athlons regarding 
-	 * large page flushing. 
-	 */
-	__flush_tlb_all(); 	
-}
-
-static void set_pmd_pte(pte_t *kpte, unsigned long address, pte_t pte) 
-{ 
-	struct page *page;
-	unsigned long flags;
-
-	set_pte_atomic(kpte, pte); 	/* change init_mm */
-	if (PTRS_PER_PMD > 1)
-		return;
-
-	spin_lock_irqsave(&pgd_lock, flags);
-	for (page = pgd_list; page; page = (struct page *)page->index) {
-		pgd_t *pgd;
-		pud_t *pud;
-		pmd_t *pmd;
-		pgd = (pgd_t *)page_address(page) + pgd_index(address);
-		pud = pud_offset(pgd, address);
-		pmd = pmd_offset(pud, address);
-		set_pte_atomic((pte_t *)pmd, pte);
-	}
-	spin_unlock_irqrestore(&pgd_lock, flags);
-}
-
-/* 
- * No more special protections in this 2/4MB area - revert to a
- * large page again. 
- */
-static inline void revert_page(struct page *kpte_page, unsigned long address)
-{
-	pte_t *linear = (pte_t *) 
-		pmd_offset(pud_offset(pgd_offset_k(address), address), address);
-	set_pmd_pte(linear,  address,
-		    pfn_pte((__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT,
-			    PAGE_KERNEL_LARGE));
-}
-
-static int
-__change_page_attr(struct page *page, pgprot_t prot)
-{ 
-	pte_t *kpte; 
-	unsigned long address;
-	struct page *kpte_page;
-
-	BUG_ON(PageHighMem(page));
-	address = (unsigned long)page_address(page);
-
-	kpte = lookup_address(address);
-	if (!kpte)
-		return -EINVAL;
-	kpte_page = virt_to_page(kpte);
-	if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) { 
-		if ((pte_val(*kpte) & _PAGE_PSE) == 0) { 
-			set_pte_atomic(kpte, mk_pte(page, prot)); 
-		} else {
-			struct page *split = split_large_page(address, prot); 
-			if (!split)
-				return -ENOMEM;
-			set_pmd_pte(kpte,address,mk_pte(split, PAGE_KERNEL));
-			kpte_page = split;
-		}	
-		get_page(kpte_page);
-	} else if ((pte_val(*kpte) & _PAGE_PSE) == 0) { 
-		set_pte_atomic(kpte, mk_pte(page, PAGE_KERNEL));
-		__put_page(kpte_page);
-	} else
-		BUG();
-
-	/*
-	 * If the pte was reserved, it means it was created at boot
-	 * time (not via split_large_page) and in turn we must not
-	 * replace it with a largepage.
-	 */
-	if (!PageReserved(kpte_page)) {
-		/* memleak and potential failed 2M page regeneration */
-		BUG_ON(!page_count(kpte_page));
-
-		if (cpu_has_pse && (page_count(kpte_page) == 1)) {
-			list_add(&kpte_page->lru, &df_list);
-			revert_page(kpte_page, address);
-		}
-	}
-	return 0;
-} 
-
-static inline void flush_map(void)
-{
-	on_each_cpu(flush_kernel_map, NULL, 1, 1);
-}
-
-/*
- * Change the page attributes of an page in the linear mapping.
- *
- * This should be used when a page is mapped with a different caching policy
- * than write-back somewhere - some CPUs do not like it when mappings with
- * different caching policies exist. This changes the page attributes of the
- * in kernel linear mapping too.
- * 
- * The caller needs to ensure that there are no conflicting mappings elsewhere.
- * This function only deals with the kernel linear map.
- * 
- * Caller must call global_flush_tlb() after this.
- */
-int change_page_attr(struct page *page, int numpages, pgprot_t prot)
-{
-	int err = 0; 
-	int i; 
-	unsigned long flags;
-
-	spin_lock_irqsave(&cpa_lock, flags);
-	for (i = 0; i < numpages; i++, page++) { 
-		err = __change_page_attr(page, prot);
-		if (err) 
-			break; 
-	} 	
-	spin_unlock_irqrestore(&cpa_lock, flags);
-	return err;
-}
-
-void global_flush_tlb(void)
-{ 
-	LIST_HEAD(l);
-	struct page *pg, *next;
-
-	BUG_ON(irqs_disabled());
-
-	spin_lock_irq(&cpa_lock);
-	list_splice_init(&df_list, &l);
-	spin_unlock_irq(&cpa_lock);
-	flush_map();
-	list_for_each_entry_safe(pg, next, &l, lru)
-		__free_page(pg);
-} 
-
-#ifdef CONFIG_DEBUG_PAGEALLOC
-void kernel_map_pages(struct page *page, int numpages, int enable)
-{
-	if (PageHighMem(page))
-		return;
-	/* the return value is ignored - the calls cannot fail,
-	 * large pages are disabled at boot time.
-	 */
-	change_page_attr(page, numpages, enable ? PAGE_KERNEL : __pgprot(0));
-	/* we should perform an IPI and flush all tlbs,
-	 * but that can deadlock->flush only current cpu.
-	 */
-	__flush_tlb_all();
-}
-#endif
-
-EXPORT_SYMBOL(change_page_attr);
-EXPORT_SYMBOL(global_flush_tlb);