1 files changed, 0 insertions, 235 deletions
diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c
deleted file mode 100644
index 94862e1ec03..00000000000
--- a/arch/x86_64/mm/pageattr.c
+++ /dev/null
@@ -1,235 +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/io.h>
-
-static inline 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;
-	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 flush_kernel_map(void *address) 
-{
-	if (0 && address && cpu_has_clflush) {
-		/* is this worth it? */ 
-		int i;
-		for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size) 
-			asm volatile("clflush (%0)" :: "r" (address + i)); 
-	} else
-		asm volatile("wbinvd":::"memory"); 
-	if (address)
-		__flush_tlb_one(address);
-	else
-		__flush_tlb_all();
-}
-
-
-static inline void flush_map(unsigned long address)
-{	
-	on_each_cpu(flush_kernel_map, (void *)address, 1, 1);
-}
-
-struct deferred_page { 
-	struct deferred_page *next; 
-	struct page *fpage;
-	unsigned long address;
-}; 
-static struct deferred_page *df_list; /* protected by init_mm.mmap_sem */
-
-static inline void save_page(unsigned long address, struct page *fpage)
-{
-	struct deferred_page *df;
-	df = kmalloc(sizeof(struct deferred_page), GFP_KERNEL); 
-	if (!df) {
-		flush_map(address);
-		__free_page(fpage);
-	} else { 
-		df->next = df_list;
-		df->fpage = fpage;
-		df->address = address;
-		df_list = df;
-	} 			
-}
-
-/* 
- * 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;
-
-	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);
-	pgprot_val(ref_prot) |= _PAGE_PSE;
-	large_pte = mk_pte_phys(__pa(address) & LARGE_PAGE_MASK, ref_prot);
-	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;
-	unsigned kpte_flags;
-	kpte = lookup_address(address);
-	if (!kpte) return 0;
-	kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
-	kpte_flags = pte_val(*kpte); 
-	if (pgprot_val(prot) != pgprot_val(ref_prot)) { 
-		if ((kpte_flags & _PAGE_PSE) == 0) { 
-			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 = split_large_page(address, prot, ref_prot); 
-			if (!split)
-				return -ENOMEM;
-			set_pte(kpte,mk_pte(split, ref_prot));
-			kpte_page = split;
-		}	
-		get_page(kpte_page);
-	} else if ((kpte_flags & _PAGE_PSE) == 0) { 
-		set_pte(kpte, pfn_pte(pfn, ref_prot));
-		__put_page(kpte_page);
-	} else
-		BUG();
-
-	/* on x86-64 the direct mapping set at boot is not using 4k pages */
- 	BUG_ON(PageReserved(kpte_page));
-
-	switch (page_count(kpte_page)) {
- 	case 1:
-		save_page(address, kpte_page); 		     
-		revert_page(address, ref_prot);
-		break;
- 	case 0:
- 		BUG(); /* memleak and failed 2M page regeneration */
- 	}
-	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; 
-	int i; 
-
-	down_write(&init_mm.mmap_sem);
-	for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
-		unsigned long pfn = __pa(address) >> PAGE_SHIFT;
-
-		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 = prot;
-			addr2 = __START_KERNEL_map + __pa(address);
- 			pgprot_val(prot2) &= ~_PAGE_NX;
-			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 deferred_page *df, *next_df;
-
-	down_read(&init_mm.mmap_sem);
-	df = xchg(&df_list, NULL);
-	up_read(&init_mm.mmap_sem);
-	if (!df)
-		return;
-	flush_map((df && !df->next) ? df->address : 0);
-	for (; df; df = next_df) { 
-		next_df = df->next;
-		if (df->fpage) 
-			__free_page(df->fpage);
-		kfree(df);
-	} 
-} 
-
-EXPORT_SYMBOL(change_page_attr);
-EXPORT_SYMBOL(global_flush_tlb);