---

yaml
---
r: 139159
b: refs/heads/master
c: 56a76f8
h: refs/heads/master
i:
  139157: dd9bbe8
  139155: 97c800e
  139151: 17ee7c4
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c2ec175c39f62949438354f603f4aa170846aabb
+refs/heads/master: 56a76f8275c379ed73c8a43cfa1dfa2f5e9cfa19

trunk/fs/btrfs/inode.c

@@ -4307,10 +4307,15 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	u64 page_end;
 
 	ret = btrfs_check_data_free_space(root, inode, PAGE_CACHE_SIZE);
-	if (ret)
+	if (ret) {
+		if (ret == -ENOMEM)
+			ret = VM_FAULT_OOM;
+		else /* -ENOSPC, -EIO, etc */
+			ret = VM_FAULT_SIGBUS;
 		goto out;
+	}
 
-	ret = -EINVAL;
+	ret = VM_FAULT_NOPAGE; /* make the VM retry the fault */
 again:
 	lock_page(page);
 	size = i_size_read(inode);
@@ -4363,8 +4368,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 out_unlock:
 	unlock_page(page);
 out:
-	if (ret)
-		ret = VM_FAULT_SIGBUS;
 	return ret;
 }
 

trunk/fs/buffer.c

@@ -2320,7 +2320,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 	struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
 	unsigned long end;
 	loff_t size;
-	int ret = -EINVAL;
+	int ret = VM_FAULT_NOPAGE; /* make the VM retry the fault */
 
 	lock_page(page);
 	size = i_size_read(inode);
@@ -2340,10 +2340,14 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 	if (!ret)
 		ret = block_commit_write(page, 0, end);
 
-out_unlock:
-	if (ret)
-		ret = VM_FAULT_SIGBUS;
+	if (unlikely(ret)) {
+		if (ret == -ENOMEM)
+			ret = VM_FAULT_OOM;
+		else /* -ENOSPC, -EIO, etc */
+			ret = VM_FAULT_SIGBUS;
+	}
 
+out_unlock:
 	unlock_page(page);
 	return ret;
 }