Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs pile (part one) from Al Viro:
 "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
  locking violations, etc.

  The most visible changes here are death of FS_REVAL_DOT (replaced with
  "has ->d_weak_revalidate()") and a new helper getting from struct file
  to inode.  Some bits of preparation to xattr method interface changes.

  Misc patches by various people sent this cycle *and* ocfs2 fixes from
  several cycles ago that should've been upstream right then.

  PS: the next vfs pile will be xattr stuff."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
  saner proc_get_inode() calling conventions
  proc: avoid extra pde_put() in proc_fill_super()
  fs: change return values from -EACCES to -EPERM
  fs/exec.c: make bprm_mm_init() static
  ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
  ocfs2: fix possible use-after-free with AIO
  ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
  get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
  target: writev() on single-element vector is pointless
  export kernel_write(), convert open-coded instances
  fs: encode_fh: return FILEID_INVALID if invalid fid_type
  kill f_vfsmnt
  vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
  nfsd: handle vfs_getattr errors in acl protocol
  switch vfs_getattr() to struct path
  default SET_PERSONALITY() in linux/elf.h
  ceph: prepopulate inodes only when request is aborted
  d_hash_and_lookup(): export, switch open-coded instances
  9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
  9p: split dropping the acls from v9fs_set_create_acl()
  ...

8 files changed, 67 insertions, 68 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9b43ff77a51e..f3b133d79914 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -383,7 +383,7 @@ static int lstats_open(struct inode *inode, struct file *file)
 static ssize_t lstats_write(struct file *file, const char __user *buf,
 			    size_t count, loff_t *offs)
 {
-	struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 
 	if (!task)
 		return -ESRCH;
@@ -602,7 +602,7 @@ static const struct inode_operations proc_def_inode_operations = {
 static ssize_t proc_info_read(struct file * file, char __user * buf,
 			  size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	unsigned long page;
 	ssize_t length;
 	struct task_struct *task = get_proc_task(inode);
@@ -668,7 +668,7 @@ static const struct file_operations proc_single_file_operations = {
 
 static int __mem_open(struct inode *inode, struct file *file, unsigned int mode)
 {
-	struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	struct mm_struct *mm;
 
 	if (!task)
@@ -869,7 +869,7 @@ static const struct file_operations proc_environ_operations = {
 static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
 			    loff_t *ppos)
 {
-	struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	char buffer[PROC_NUMBUF];
 	int oom_adj = OOM_ADJUST_MIN;
 	size_t len;
@@ -916,7 +916,7 @@ static ssize_t oom_adj_write(struct file *file, const char __user *buf,
 		goto out;
 	}
 
-	task = get_proc_task(file->f_path.dentry->d_inode);
+	task = get_proc_task(file_inode(file));
 	if (!task) {
 		err = -ESRCH;
 		goto out;
@@ -976,7 +976,7 @@ static const struct file_operations proc_oom_adj_operations = {
 static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
 					size_t count, loff_t *ppos)
 {
-	struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	char buffer[PROC_NUMBUF];
 	short oom_score_adj = OOM_SCORE_ADJ_MIN;
 	unsigned long flags;
@@ -1019,7 +1019,7 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
 		goto out;
 	}
 
-	task = get_proc_task(file->f_path.dentry->d_inode);
+	task = get_proc_task(file_inode(file));
 	if (!task) {
 		err = -ESRCH;
 		goto out;
@@ -1067,7 +1067,7 @@ static const struct file_operations proc_oom_score_adj_operations = {
 static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
 				  size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	struct task_struct *task = get_proc_task(inode);
 	ssize_t length;
 	char tmpbuf[TMPBUFLEN];
@@ -1084,7 +1084,7 @@ static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
 static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
 				   size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	char *page, *tmp;
 	ssize_t length;
 	uid_t loginuid;
@@ -1142,7 +1142,7 @@ static const struct file_operations proc_loginuid_operations = {
 static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
 				  size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	struct task_struct *task = get_proc_task(inode);
 	ssize_t length;
 	char tmpbuf[TMPBUFLEN];
@@ -1165,7 +1165,7 @@ static const struct file_operations proc_sessionid_operations = {
 static ssize_t proc_fault_inject_read(struct file * file, char __user * buf,
 				      size_t count, loff_t *ppos)
 {
-	struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	char buffer[PROC_NUMBUF];
 	size_t len;
 	int make_it_fail;
@@ -1197,7 +1197,7 @@ static ssize_t proc_fault_inject_write(struct file * file,
 	make_it_fail = simple_strtol(strstrip(buffer), &end, 0);
 	if (*end)
 		return -EINVAL;
-	task = get_proc_task(file->f_dentry->d_inode);
+	task = get_proc_task(file_inode(file));
 	if (!task)
 		return -ESRCH;
 	task->make_it_fail = make_it_fail;
@@ -1237,7 +1237,7 @@ static ssize_t
 sched_write(struct file *file, const char __user *buf,
 	    size_t count, loff_t *offset)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct task_struct *p;
 
 	p = get_proc_task(inode);
@@ -1288,7 +1288,7 @@ static ssize_t
 sched_autogroup_write(struct file *file, const char __user *buf,
 	    size_t count, loff_t *offset)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct task_struct *p;
 	char buffer[PROC_NUMBUF];
 	int nice;
@@ -1343,7 +1343,7 @@ static const struct file_operations proc_pid_sched_autogroup_operations = {
 static ssize_t comm_write(struct file *file, const char __user *buf,
 				size_t count, loff_t *offset)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct task_struct *p;
 	char buffer[TASK_COMM_LEN];
 
@@ -1711,7 +1711,7 @@ static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
 		return -ECHILD;
 
 	if (!capable(CAP_SYS_ADMIN)) {
-		status = -EACCES;
+		status = -EPERM;
 		goto out_notask;
 	}
 
@@ -1844,7 +1844,7 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
 	struct dentry *result;
 	struct mm_struct *mm;
 
-	result = ERR_PTR(-EACCES);
+	result = ERR_PTR(-EPERM);
 	if (!capable(CAP_SYS_ADMIN))
 		goto out;
 
@@ -1900,7 +1900,7 @@ proc_map_files_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	ino_t ino;
 	int ret;
 
-	ret = -EACCES;
+	ret = -EPERM;
 	if (!capable(CAP_SYS_ADMIN))
 		goto out;
 
@@ -2146,7 +2146,7 @@ out_no_task:
 static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
 				  size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	char *p = NULL;
 	ssize_t length;
 	struct task_struct *task = get_proc_task(inode);
@@ -2167,7 +2167,7 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
 static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
 				   size_t count, loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	char *page;
 	ssize_t length;
 	struct task_struct *task = get_proc_task(inode);
@@ -2256,7 +2256,7 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
 static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
 					 size_t count, loff_t *ppos)
 {
-	struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	struct mm_struct *mm;
 	char buffer[PROC_NUMBUF];
 	size_t len;
@@ -2308,7 +2308,7 @@ static ssize_t proc_coredump_filter_write(struct file *file,
 		goto out_no_task;
 
 	ret = -ESRCH;
-	task = get_proc_task(file->f_dentry->d_inode);
+	task = get_proc_task(file_inode(file));
 	if (!task)
 		goto out_no_task;
 
@@ -2618,6 +2618,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
 
 	name.name = buf;
 	name.len = snprintf(buf, sizeof(buf), "%d", pid);
+	/* no ->d_hash() rejects on procfs */
 	dentry = d_hash_and_lookup(mnt->mnt_root, &name);
 	if (dentry) {
 		shrink_dcache_parent(dentry);
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 76ddae83daa5..2983dc52ca25 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -42,7 +42,7 @@ static ssize_t
 __proc_file_read(struct file *file, char __user *buf, size_t nbytes,
 	       loff_t *ppos)
 {
-	struct inode * inode = file->f_path.dentry->d_inode;
+	struct inode * inode = file_inode(file);
 	char 	*page;
 	ssize_t	retval=0;
 	int	eof=0;
@@ -188,7 +188,7 @@ static ssize_t
 proc_file_read(struct file *file, char __user *buf, size_t nbytes,
 	       loff_t *ppos)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	ssize_t rv = -EIO;
 
 	spin_lock(&pde->pde_unload_lock);
@@ -209,7 +209,7 @@ static ssize_t
 proc_file_write(struct file *file, const char __user *buffer,
 		size_t count, loff_t *ppos)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	ssize_t rv = -EIO;
 
 	if (pde->write_proc) {
@@ -412,8 +412,7 @@ static const struct dentry_operations proc_dentry_operations =
 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
 		struct dentry *dentry)
 {
-	struct inode *inode = NULL;
-	int error = -ENOENT;
+	struct inode *inode;
 
 	spin_lock(&proc_subdir_lock);
 	for (de = de->subdir; de ; de = de->next) {
@@ -422,22 +421,16 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
 		if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
 			pde_get(de);
 			spin_unlock(&proc_subdir_lock);
-			error = -ENOMEM;
 			inode = proc_get_inode(dir->i_sb, de);
-			goto out_unlock;
+			if (!inode)
+				return ERR_PTR(-ENOMEM);
+			d_set_d_op(dentry, &proc_dentry_operations);
+			d_add(dentry, inode);
+			return NULL;
 		}
 	}
 	spin_unlock(&proc_subdir_lock);
-out_unlock:
-
-	if (inode) {
-		d_set_d_op(dentry, &proc_dentry_operations);
-		d_add(dentry, inode);
-		return NULL;
-	}
-	if (de)
-		pde_put(de);
-	return ERR_PTR(error);
+	return ERR_PTR(-ENOENT);
 }
 
 struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
@@ -460,7 +453,7 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
 {
 	unsigned int ino;
 	int i;
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	int ret = 0;
 
 	ino = inode->i_ino;
@@ -522,7 +515,7 @@ out:
 
 int proc_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 
 	return proc_readdir_de(PDE(inode), filp, dirent, filldir);
 }
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 439ae6886507..70322e1a4f0f 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -144,7 +144,7 @@ void pde_users_dec(struct proc_dir_entry *pde)
 
 static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	loff_t rv = -EINVAL;
 	loff_t (*llseek)(struct file *, loff_t, int);
 
@@ -179,7 +179,7 @@ static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
 
 static ssize_t proc_reg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	ssize_t rv = -EIO;
 	ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
 
@@ -201,7 +201,7 @@ static ssize_t proc_reg_read(struct file *file, char __user *buf, size_t count,
 
 static ssize_t proc_reg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	ssize_t rv = -EIO;
 	ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
 
@@ -223,7 +223,7 @@ static ssize_t proc_reg_write(struct file *file, const char __user *buf, size_t
 
 static unsigned int proc_reg_poll(struct file *file, struct poll_table_struct *pts)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	unsigned int rv = DEFAULT_POLLMASK;
 	unsigned int (*poll)(struct file *, struct poll_table_struct *);
 
@@ -245,7 +245,7 @@ static unsigned int proc_reg_poll(struct file *file, struct poll_table_struct *p
 
 static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	long rv = -ENOTTY;
 	long (*ioctl)(struct file *, unsigned int, unsigned long);
 
@@ -268,7 +268,7 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne
 #ifdef CONFIG_COMPAT
 static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	long rv = -ENOTTY;
 	long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
 
@@ -291,7 +291,7 @@ static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned
 
 static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma)
 {
-	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	struct proc_dir_entry *pde = PDE(file_inode(file));
 	int rv = -EIO;
 	int (*mmap)(struct file *, struct vm_area_struct *);
 
@@ -445,12 +445,9 @@ static const struct file_operations proc_reg_file_ops_no_compat = {
 
 struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 {
-	struct inode * inode;
+	struct inode *inode = iget_locked(sb, de->low_ino);
 
-	inode = iget_locked(sb, de->low_ino);
-	if (!inode)
-		return NULL;
-	if (inode->i_state & I_NEW) {
+	if (inode && (inode->i_state & I_NEW)) {
 		inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 		PROC_I(inode)->pde = de;
 
@@ -482,10 +479,12 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 	} else
 	       pde_put(de);
 	return inode;
-}			
+}
 
 int proc_fill_super(struct super_block *s)
 {
+	struct inode *root_inode;
+
 	s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
@@ -494,11 +493,17 @@ int proc_fill_super(struct super_block *s)
 	s->s_time_gran = 1;
 	
 	pde_get(&proc_root);
-	s->s_root = d_make_root(proc_get_inode(s, &proc_root));
-	if (s->s_root)
-		return 0;
+	root_inode = proc_get_inode(s, &proc_root);
+	if (!root_inode) {
+		printk(KERN_ERR "proc_fill_super: get root inode failed\n");
+		return -ENOMEM;
+	}
 
-	printk("proc_read_super: get root inode failed\n");
-	pde_put(&proc_root);
-	return -ENOMEM;
+	s->s_root = d_make_root(root_inode);
+	if (!s->s_root) {
+		printk(KERN_ERR "proc_fill_super: allocate dentry failed\n");
+		return -ENOMEM;
+	}
+
+	return 0;
 }
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index b1822dde55c2..ccfd99bd1c5a 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -45,7 +45,7 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
 	file = region->vm_file;
 
 	if (file) {
-		struct inode *inode = region->vm_file->f_path.dentry->d_inode;
+		struct inode *inode = file_inode(region->vm_file);
 		dev = inode->i_sb->s_dev;
 		ino = inode->i_ino;
 	}
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 3131a03d7d37..b4ac6572474f 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -163,7 +163,7 @@ static int proc_tgid_net_readdir(struct file *filp, void *dirent,
 	struct net *net;
 
 	ret = -EINVAL;
-	net = get_proc_task_net(filp->f_path.dentry->d_inode);
+	net = get_proc_task_net(file_inode(filp));
 	if (net != NULL) {
 		ret = proc_readdir_de(net->proc_net, filp, dirent, filldir);
 		put_net(net);
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 1827d88ad58b..612df79cc6a1 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -478,7 +478,7 @@ out:
 static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
 		size_t count, loff_t *ppos, int write)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	struct ctl_table_header *head = grab_header(inode);
 	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
 	ssize_t error;
@@ -542,7 +542,7 @@ static int proc_sys_open(struct inode *inode, struct file *filp)
 
 static unsigned int proc_sys_poll(struct file *filp, poll_table *wait)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	struct ctl_table_header *head = grab_header(inode);
 	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
 	unsigned int ret = DEFAULT_POLLMASK;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index ca5ce7f9f800..3e636d864d56 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -271,7 +271,7 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
 	const char *name = NULL;
 
 	if (file) {
-		struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+		struct inode *inode = file_inode(vma->vm_file);
 		dev = inode->i_sb->s_dev;
 		ino = inode->i_ino;
 		pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
@@ -743,7 +743,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 		return rv;
 	if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
 		return -EINVAL;
-	task = get_proc_task(file->f_path.dentry->d_inode);
+	task = get_proc_task(file_inode(file));
 	if (!task)
 		return -ESRCH;
 	mm = get_task_mm(task);
@@ -1015,7 +1015,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
 static ssize_t pagemap_read(struct file *file, char __user *buf,
 			    size_t count, loff_t *ppos)
 {
-	struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+	struct task_struct *task = get_proc_task(file_inode(file));
 	struct mm_struct *mm;
 	struct pagemapread pm;
 	int ret = -ESRCH;
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 1ccfa537f5f5..56123a6f462e 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -149,7 +149,7 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
 	file = vma->vm_file;
 
 	if (file) {
-		struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+		struct inode *inode = file_inode(vma->vm_file);
 		dev = inode->i_sb->s_dev;
 		ino = inode->i_ino;
 		pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT;