1 files changed, 4 insertions, 64 deletions

diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 437d1f1cc5ec..bc38f79ca3a3 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -162,9 +162,6 @@ static int add_munmap(unsigned long addr, unsigned long len,
 	struct host_vm_op *last;
 	int ret = 0;
 
-	if ((addr >= STUB_START) && (addr < STUB_END))
-		return -EINVAL;
-
 	if (hvc->index != 0) {
 		last = &hvc->ops[hvc->index - 1];
 		if ((last->type == MUNMAP) &&
@@ -226,9 +223,6 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
 
 	pte = pte_offset_kernel(pmd, addr);
 	do {
-		if ((addr >= STUB_START) && (addr < STUB_END))
-			continue;
-
 		r = pte_read(*pte);
 		w = pte_write(*pte);
 		x = pte_exec(*pte);
@@ -346,12 +340,11 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
 
 	/* This is not an else because ret is modified above */
 	if (ret) {
+		struct mm_id *mm_idp = &current->mm->context.id;
+
 		printk(KERN_ERR "fix_range_common: failed, killing current "
 		       "process: %d\n", task_tgid_vnr(current));
-		/* We are under mmap_lock, release it such that current can terminate */
-		mmap_write_unlock(current->mm);
-		force_sig(SIGKILL);
-		do_signal(&current->thread.regs);
+		mm_idp->kill = 1;
 	}
 }
 
@@ -472,6 +465,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
 	struct mm_id *mm_id;
 
 	address &= PAGE_MASK;
+
 	pgd = pgd_offset(mm, address);
 	if (!pgd_present(*pgd))
 		goto kill;
@@ -608,57 +602,3 @@ void force_flush_all(void)
 		vma = vma->vm_next;
 	}
 }
-
-struct page_change_data {
-	unsigned int set_mask, clear_mask;
-};
-
-static int change_page_range(pte_t *ptep, unsigned long addr, void *data)
-{
-	struct page_change_data *cdata = data;
-	pte_t pte = READ_ONCE(*ptep);
-
-	pte_clear_bits(pte, cdata->clear_mask);
-	pte_set_bits(pte, cdata->set_mask);
-
-	set_pte(ptep, pte);
-	return 0;
-}
-
-static int change_memory(unsigned long start, unsigned long pages,
-			 unsigned int set_mask, unsigned int clear_mask)
-{
-	unsigned long size = pages * PAGE_SIZE;
-	struct page_change_data data;
-	int ret;
-
-	data.set_mask = set_mask;
-	data.clear_mask = clear_mask;
-
-	ret = apply_to_page_range(&init_mm, start, size, change_page_range,
-				  &data);
-
-	flush_tlb_kernel_range(start, start + size);
-
-	return ret;
-}
-
-int set_memory_ro(unsigned long addr, int numpages)
-{
-	return change_memory(addr, numpages, 0, _PAGE_RW);
-}
-
-int set_memory_rw(unsigned long addr, int numpages)
-{
-	return change_memory(addr, numpages, _PAGE_RW, 0);
-}
-
-int set_memory_nx(unsigned long addr, int numpages)
-{
-	return -EOPNOTSUPP;
-}
-
-int set_memory_x(unsigned long addr, int numpages)
-{
-	return -EOPNOTSUPP;
-}