X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;ds=sidebyside;f=mm%2Fmmap.c;h=497e502dfd6b6e54fc2bf902ea55fac36e70ac72;hb=c52f0aa574246f133a0bc2041e9468a06d34da7b;hp=d799d896d74aae5f19c604928eb6a52738676d66;hpb=2dc94310bd94d0906febea7d0f7c188da620c952;p=powerpc.git

diff --git a/mm/mmap.c b/mm/mmap.c
index d799d896d7..497e502dfd 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -116,7 +116,7 @@ int __vm_enough_memory(long pages, int cap_sys_admin)
 		 * which are reclaimable, under pressure.  The dentry
 		 * cache and most inode caches should fall into this
 		 */
-		free += atomic_read(&slab_reclaim_pages);
+		free += global_page_state(NR_SLAB_RECLAIMABLE);
 
 		/*
 		 * Leave the last 3% for root
@@ -900,17 +900,6 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
 	int accountable = 1;
 	unsigned long charged = 0, reqprot = prot;
 
-	if (file) {
-		if (is_file_hugepages(file))
-			accountable = 0;
-
-		if (!file->f_op || !file->f_op->mmap)
-			return -ENODEV;
-
-		if ((prot & PROT_EXEC) &&
-		    (file->f_vfsmnt->mnt_flags & MNT_NOEXEC))
-			return -EPERM;
-	}
 	/*
 	 * Does the application expect PROT_READ to imply PROT_EXEC?
 	 *
@@ -1000,6 +989,16 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
 		case MAP_PRIVATE:
 			if (!(file->f_mode & FMODE_READ))
 				return -EACCES;
+			if (file->f_vfsmnt->mnt_flags & MNT_NOEXEC) {
+				if (vm_flags & VM_EXEC)
+					return -EPERM;
+				vm_flags &= ~VM_MAYEXEC;
+			}
+			if (is_file_hugepages(file))
+				accountable = 0;
+
+			if (!file->f_op || !file->f_op->mmap)
+				return -ENODEV;
 			break;
 
 		default:
@@ -1105,12 +1104,6 @@ munmap_back:
 			goto free_vma;
 	}
 
-	/* Don't make the VMA automatically writable if it's shared, but the
-	 * backer wishes to know when pages are first written to */
-	if (vma->vm_ops && vma->vm_ops->page_mkwrite)
-		vma->vm_page_prot =
-			protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
-
 	/* We set VM_ACCOUNT in a shared mapping's vm_flags, to inform
 	 * shmem_zero_setup (perhaps called through /dev/zero's ->mmap)
 	 * that memory reservation must be checked; but that reservation
@@ -1128,6 +1121,10 @@ munmap_back:
 	pgoff = vma->vm_pgoff;
 	vm_flags = vma->vm_flags;
 
+	if (vma_wants_writenotify(vma))
+		vma->vm_page_prot =
+			protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
+
 	if (!file || !vma_merge(mm, prev, addr, vma->vm_end,
 			vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
 		file = vma->vm_file;