1 files changed, 0 insertions, 249 deletions
diff --git a/arch/x86_64/mm/pageattr_64.c b/arch/x86_64/mm/pageattr_64.c
deleted file mode 100644
index 10b9809ce82..00000000000
--- a/arch/x86_64/mm/pageattr_64.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/* 
- * Copyright 2002 Andi Kleen, SuSE Labs. 
- * Thanks to Ben LaHaise for precious feedback.
- */ 
-
-#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/io.h>
-
-pte_t *lookup_address(unsigned long address)
-{ 
-	pgd_t *pgd = pgd_offset_k(address);
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *pte;
-	if (pgd_none(*pgd))
-		return NULL;
-	pud = pud_offset(pgd, address);
-	if (!pud_present(*pud))
-		return NULL; 
-	pmd = pmd_offset(pud, address);
-	if (!pmd_present(*pmd))
-		return NULL; 
-	if (pmd_large(*pmd))
-		return (pte_t *)pmd;
-	pte = pte_offset_kernel(pmd, address);
-	if (pte && !pte_present(*pte))
-		pte = NULL; 
-	return pte;
-} 
-
-static struct page *split_large_page(unsigned long address, pgprot_t prot,
-				     pgprot_t ref_prot)
-{ 
-	int i; 
-	unsigned long addr;
-	struct page *base = alloc_pages(GFP_KERNEL, 0);
-	pte_t *pbase;
-	if (!base) 
-		return NULL;
-	/*
-	 * page_private is used to track the number of entries in
-	 * the page table page have non standard attributes.
-	 */
-	SetPagePrivate(base);
-	page_private(base) = 0;
-
-	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) {
-		pbase[i] = pfn_pte(addr >> PAGE_SHIFT, 
-				   addr == address ? prot : ref_prot);
-	}
-	return base;
-} 
-
-static void cache_flush_page(void *adr)
-{
-	int i;
-	for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
-		asm volatile("clflush (%0)" :: "r" (adr + i));
-}
-
-static void flush_kernel_map(void *arg)
-{
-	struct list_head *l = (struct list_head *)arg;
-	struct page *pg;
-
-	/* When clflush is available always use it because it is
-	   much cheaper than WBINVD. */
-	/* clflush is still broken. Disable for now. */
-	if (1 || !cpu_has_clflush)
-		asm volatile("wbinvd" ::: "memory");
-	else list_for_each_entry(pg, l, lru) {
-		void *adr = page_address(pg);
-		cache_flush_page(adr);
-	}
-	__flush_tlb_all();
-}
-
-static inline void flush_map(struct list_head *l)
-{	
-	on_each_cpu(flush_kernel_map, l, 1, 1);
-}
-
-static LIST_HEAD(deferred_pages); /* protected by init_mm.mmap_sem */
-
-static inline void save_page(struct page *fpage)
-{
-	if (!test_and_set_bit(PG_arch_1, &fpage->flags))
-		list_add(&fpage->lru, &deferred_pages);
-}
-
-/* 
- * No more special protections in this 2/4MB area - revert to a
- * large page again. 
- */
-static void revert_page(unsigned long address, pgprot_t ref_prot)
-{
-	pgd_t *pgd;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t large_pte;
-	unsigned long pfn;
-
-	pgd = pgd_offset_k(address);
-	BUG_ON(pgd_none(*pgd));
-	pud = pud_offset(pgd,address);
-	BUG_ON(pud_none(*pud));
-	pmd = pmd_offset(pud, address);
-	BUG_ON(pmd_val(*pmd) & _PAGE_PSE);
-	pfn = (__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT;
-	large_pte = pfn_pte(pfn, ref_prot);
-	large_pte = pte_mkhuge(large_pte);
-	set_pte((pte_t *)pmd, large_pte);
-}      
-
-static int
-__change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot,
-				   pgprot_t ref_prot)
-{ 
-	pte_t *kpte; 
-	struct page *kpte_page;
-	pgprot_t ref_prot2;
-
-	kpte = lookup_address(address);
-	if (!kpte) return 0;
-	kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
-	BUG_ON(PageLRU(kpte_page));
-	BUG_ON(PageCompound(kpte_page));
-	if (pgprot_val(prot) != pgprot_val(ref_prot)) { 
-		if (!pte_huge(*kpte)) {
-			set_pte(kpte, pfn_pte(pfn, prot));
-		} else {
- 			/*
-			 * split_large_page will take the reference for this
-			 * change_page_attr on the split page.
- 			 */
-			struct page *split;
-			ref_prot2 = pte_pgprot(pte_clrhuge(*kpte));
-			split = split_large_page(address, prot, ref_prot2);
-			if (!split)
-				return -ENOMEM;
-			set_pte(kpte, mk_pte(split, ref_prot2));
-			kpte_page = split;
-		}
-		page_private(kpte_page)++;
-	} else if (!pte_huge(*kpte)) {
-		set_pte(kpte, pfn_pte(pfn, ref_prot));
-		BUG_ON(page_private(kpte_page) == 0);
-		page_private(kpte_page)--;
-	} else
-		BUG();
-
-	/* on x86-64 the direct mapping set at boot is not using 4k pages */
- 	BUG_ON(PageReserved(kpte_page));
-
-	save_page(kpte_page);
-	if (page_private(kpte_page) == 0)
-		revert_page(address, ref_prot);
-	return 0;
-} 
-
-/*
- * 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_addr(unsigned long address, int numpages, pgprot_t prot)
-{
-	int err = 0, kernel_map = 0;
-	int i; 
-
-	if (address >= __START_KERNEL_map
-	    && address < __START_KERNEL_map + KERNEL_TEXT_SIZE) {
-		address = (unsigned long)__va(__pa(address));
-		kernel_map = 1;
-	}
-
-	down_write(&init_mm.mmap_sem);
-	for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
-		unsigned long pfn = __pa(address) >> PAGE_SHIFT;
-
-		if (!kernel_map || pte_present(pfn_pte(0, prot))) {
-			err = __change_page_attr(address, pfn, prot, PAGE_KERNEL);
-			if (err)
-				break;
-		}
-		/* Handle kernel mapping too which aliases part of the
-		 * lowmem */
-		if (__pa(address) < KERNEL_TEXT_SIZE) {
-			unsigned long addr2;
-			pgprot_t prot2;
-			addr2 = __START_KERNEL_map + __pa(address);
-			/* Make sure the kernel mappings stay executable */
-			prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot)));
-			err = __change_page_attr(addr2, pfn, prot2,
-						 PAGE_KERNEL_EXEC);
-		} 
-	} 	
-	up_write(&init_mm.mmap_sem); 
-	return err;
-}
-
-/* Don't call this for MMIO areas that may not have a mem_map entry */
-int change_page_attr(struct page *page, int numpages, pgprot_t prot)
-{
-	unsigned long addr = (unsigned long)page_address(page);
-	return change_page_attr_addr(addr, numpages, prot);
-}
-
-void global_flush_tlb(void)
-{ 
-	struct page *pg, *next;
-	struct list_head l;
-
-	down_read(&init_mm.mmap_sem);
-	list_replace_init(&deferred_pages, &l);
-	up_read(&init_mm.mmap_sem);
-
-	flush_map(&l);
-
-	list_for_each_entry_safe(pg, next, &l, lru) {
-		list_del(&pg->lru);
-		clear_bit(PG_arch_1, &pg->flags);
-		if (page_private(pg) != 0)
-			continue;
-		ClearPagePrivate(pg);
-		__free_page(pg);
-	} 
-} 
-
-EXPORT_SYMBOL(change_page_attr);
-EXPORT_SYMBOL(global_flush_tlb);