1 files changed, 0 insertions, 154 deletions
diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
deleted file mode 100644
index 633249c3ba9..00000000000
--- a/arch/s390/lib/uaccess_pt.c
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- *  arch/s390/lib/uaccess_pt.c
- *
- *  User access functions based on page table walks.
- *
- *    Copyright IBM Corp. 2006
- *    Author(s): Gerald Schaefer (gerald.schaefer@de.ibm.com)
- */
-
-#include <linux/errno.h>
-#include <linux/mm.h>
-#include <asm/uaccess.h>
-#include <asm/futex.h>
-
-static inline int __handle_fault(struct mm_struct *mm, unsigned long address,
-				 int write_access)
-{
-	struct vm_area_struct *vma;
-	int ret = -EFAULT;
-
-	down_read(&mm->mmap_sem);
-	vma = find_vma(mm, address);
-	if (unlikely(!vma))
-		goto out;
-	if (unlikely(vma->vm_start > address)) {
-		if (!(vma->vm_flags & VM_GROWSDOWN))
-			goto out;
-		if (expand_stack(vma, address))
-			goto out;
-	}
-
-	if (!write_access) {
-		/* page not present, check vm flags */
-		if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
-			goto out;
-	} else {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto out;
-	}
-
-survive:
-	switch (handle_mm_fault(mm, vma, address, write_access)) {
-	case VM_FAULT_MINOR:
-		current->min_flt++;
-		break;
-	case VM_FAULT_MAJOR:
-		current->maj_flt++;
-		break;
-	case VM_FAULT_SIGBUS:
-		goto out_sigbus;
-	case VM_FAULT_OOM:
-		goto out_of_memory;
-	default:
-		BUG();
-	}
-	ret = 0;
-out:
-	up_read(&mm->mmap_sem);
-	return ret;
-
-out_of_memory:
-	up_read(&mm->mmap_sem);
-	if (is_init(current)) {
-		yield();
-		down_read(&mm->mmap_sem);
-		goto survive;
-	}
-	printk("VM: killing process %s\n", current->comm);
-	return ret;
-
-out_sigbus:
-	up_read(&mm->mmap_sem);
-	current->thread.prot_addr = address;
-	current->thread.trap_no = 0x11;
-	force_sig(SIGBUS, current);
-	return ret;
-}
-
-static inline size_t __user_copy_pt(unsigned long uaddr, void *kptr,
-				    size_t n, int write_user)
-{
-	struct mm_struct *mm = current->mm;
-	unsigned long offset, pfn, done, size;
-	pgd_t *pgd;
-	pmd_t *pmd;
-	pte_t *pte;
-	void *from, *to;
-
-	done = 0;
-retry:
-	spin_lock(&mm->page_table_lock);
-	do {
-		pgd = pgd_offset(mm, uaddr);
-		if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
-			goto fault;
-
-		pmd = pmd_offset(pgd, uaddr);
-		if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd)))
-			goto fault;
-
-		pte = pte_offset_map(pmd, uaddr);
-		if (!pte || !pte_present(*pte) ||
-		    (write_user && !pte_write(*pte)))
-			goto fault;
-
-		pfn = pte_pfn(*pte);
-		if (!pfn_valid(pfn))
-			goto out;
-
-		offset = uaddr & (PAGE_SIZE - 1);
-		size = min(n - done, PAGE_SIZE - offset);
-		if (write_user) {
-			to = (void *)((pfn << PAGE_SHIFT) + offset);
-			from = kptr + done;
-		} else {
-			from = (void *)((pfn << PAGE_SHIFT) + offset);
-			to = kptr + done;
-		}
-		memcpy(to, from, size);
-		done += size;
-		uaddr += size;
-	} while (done < n);
-out:
-	spin_unlock(&mm->page_table_lock);
-	return n - done;
-fault:
-	spin_unlock(&mm->page_table_lock);
-	if (__handle_fault(mm, uaddr, write_user))
-		return n - done;
-	goto retry;
-}
-
-size_t copy_from_user_pt(size_t n, const void __user *from, void *to)
-{
-	size_t rc;
-
-	if (segment_eq(get_fs(), KERNEL_DS)) {
-		memcpy(to, (void __kernel __force *) from, n);
-		return 0;
-	}
-	rc = __user_copy_pt((unsigned long) from, to, n, 0);
-	if (unlikely(rc))
-		memset(to + n - rc, 0, rc);
-	return rc;
-}
-
-size_t copy_to_user_pt(size_t n, void __user *to, const void *from)
-{
-	if (segment_eq(get_fs(), KERNEL_DS)) {
-		memcpy((void __kernel __force *) to, from, n);
-		return 0;
-	}
-	return __user_copy_pt((unsigned long) to, (void *) from, n, 1);
-}