1 files changed, 56 insertions, 30 deletions

diff --git a/arch/nios2/mm/init.c b/arch/nios2/mm/init.c
index 2c609c2516b2..94efa3de3933 100644
--- a/arch/nios2/mm/init.c
+++ b/arch/nios2/mm/init.c
@@ -26,10 +26,10 @@
 #include <linux/memblock.h>
 #include <linux/slab.h>
 #include <linux/binfmts.h>
+#include <linux/execmem.h>
 
 #include <asm/setup.h>
 #include <asm/page.h>
-#include <asm/pgtable.h>
 #include <asm/sections.h>
 #include <asm/tlb.h>
 #include <asm/mmu_context.h>
@@ -46,46 +46,32 @@ pgd_t *pgd_current;
  */
 void __init paging_init(void)
 {
-	unsigned long zones_size[MAX_NR_ZONES];
-
-	memset(zones_size, 0, sizeof(zones_size));
+	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
 
 	pagetable_init();
 	pgd_current = swapper_pg_dir;
 
-	zones_size[ZONE_NORMAL] = max_mapnr;
+	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
 
 	/* pass the memory from the bootmem allocator to the main allocator */
-	free_area_init(zones_size);
+	free_area_init(max_zone_pfn);
 
 	flush_dcache_range((unsigned long)empty_zero_page,
 			(unsigned long)empty_zero_page + PAGE_SIZE);
 }
 
-void __init mem_init(void)
-{
-	unsigned long end_mem   = memory_end; /* this must not include
-						kernel stack at top */
-
-	pr_debug("mem_init: start=%lx, end=%lx\n", memory_start, memory_end);
-
-	end_mem &= PAGE_MASK;
-	high_memory = __va(end_mem);
-
-	/* this will put all memory onto the freelists */
-	memblock_free_all();
-	mem_init_print_info(NULL);
-}
-
 void __init mmu_init(void)
 {
 	flush_tlb_all();
 }
 
-#define __page_aligned(order) __aligned(PAGE_SIZE << (order))
-pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PGD_ORDER);
-pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER);
+pgd_t swapper_pg_dir[PTRS_PER_PGD] __aligned(PAGE_SIZE);
+pte_t invalid_pte_table[PTRS_PER_PTE] __aligned(PAGE_SIZE);
 static struct page *kuser_page[1];
+static struct vm_special_mapping vdso_mapping = {
+	.name = "[vdso]",
+	.pages = kuser_page,
+};
 
 static int alloc_kuser_page(void)
 {
@@ -110,21 +96,61 @@ arch_initcall(alloc_kuser_page);
 int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 {
 	struct mm_struct *mm = current->mm;
-	int ret;
+	struct vm_area_struct *vma;
 
-	down_write(&mm->mmap_sem);
+	mmap_write_lock(mm);
 
 	/* Map kuser helpers to user space address */
-	ret = install_special_mapping(mm, KUSER_BASE, KUSER_SIZE,
+	vma = _install_special_mapping(mm, KUSER_BASE, KUSER_SIZE,
 				      VM_READ | VM_EXEC | VM_MAYREAD |
-				      VM_MAYEXEC, kuser_page);
+				      VM_MAYEXEC, &vdso_mapping);
 
-	up_write(&mm->mmap_sem);
+	mmap_write_unlock(mm);
 
-	return ret;
+	return IS_ERR(vma) ? PTR_ERR(vma) : 0;
 }
 
 const char *arch_vma_name(struct vm_area_struct *vma)
 {
 	return (vma->vm_start == KUSER_BASE) ? "[kuser]" : NULL;
 }
+
+static const pgprot_t protection_map[16] = {
+	[VM_NONE]					= MKP(0, 0, 0),
+	[VM_READ]					= MKP(0, 0, 1),
+	[VM_WRITE]					= MKP(0, 0, 0),
+	[VM_WRITE | VM_READ]				= MKP(0, 0, 1),
+	[VM_EXEC]					= MKP(1, 0, 0),
+	[VM_EXEC | VM_READ]				= MKP(1, 0, 1),
+	[VM_EXEC | VM_WRITE]				= MKP(1, 0, 0),
+	[VM_EXEC | VM_WRITE | VM_READ]			= MKP(1, 0, 1),
+	[VM_SHARED]					= MKP(0, 0, 0),
+	[VM_SHARED | VM_READ]				= MKP(0, 0, 1),
+	[VM_SHARED | VM_WRITE]				= MKP(0, 1, 0),
+	[VM_SHARED | VM_WRITE | VM_READ]		= MKP(0, 1, 1),
+	[VM_SHARED | VM_EXEC]				= MKP(1, 0, 0),
+	[VM_SHARED | VM_EXEC | VM_READ]			= MKP(1, 0, 1),
+	[VM_SHARED | VM_EXEC | VM_WRITE]		= MKP(1, 1, 0),
+	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= MKP(1, 1, 1)
+};
+DECLARE_VM_GET_PAGE_PROT
+
+#ifdef CONFIG_EXECMEM
+static struct execmem_info execmem_info __ro_after_init;
+
+struct execmem_info __init *execmem_arch_setup(void)
+{
+	execmem_info = (struct execmem_info){
+		.ranges = {
+			[EXECMEM_DEFAULT] = {
+				.start	= MODULES_VADDR,
+				.end	= MODULES_END,
+				.pgprot	= PAGE_KERNEL_EXEC,
+				.alignment = 1,
+			},
+		},
+	};
+
+	return &execmem_info;
+}
+#endif /* CONFIG_EXECMEM */